{"video_id":"l06PlYNShpQ","title":"Water Cooling a TI-84 Graphing Calculator!","channel":"Linus Tech Tips","show":"Linus Tech Tips","published_at":"2021-05-05T14:53:29Z","duration_s":764,"segments":[{"start_s":0.08,"end_s":8.08,"text":"did you know that you can overclock a graphing calculator for fun and profit","speaker":null,"is_sponsor":0},{"start_s":6.4,"end_s":11.92,"text":"yeah so we called up texas instruments and we're like hey guys can you send us","speaker":null,"is_sponsor":0},{"start_s":10.4,"end_s":15.92,"text":"some calculators to overclock so they sent us this one which","speaker":null,"is_sponsor":0},{"start_s":14.16,"end_s":18.88,"text":"this doesn't look like a calculator like it does that looks exactly like a","speaker":null,"is_sponsor":0},{"start_s":17.68,"end_s":26.0,"text":"calculator what are you talking about but it doesn't look like the calculator no it's not the calculator so we","speaker":null,"is_sponsor":0},{"start_s":22.96,"end_s":29.359,"text":"actually had to go digging through","speaker":null,"is_sponsor":0},{"start_s":26.0,"end_s":33.12,"text":"alex's sentimental drawer where we found","speaker":null,"is_sponsor":0},{"start_s":29.359,"end_s":35.36,"text":"the very ti 84 plus that got him most of","speaker":null,"is_sponsor":0},{"start_s":33.12,"end_s":39.04,"text":"the way through engineering school and also most of this job so i guess what","speaker":null,"is_sponsor":0},{"start_s":37.52,"end_s":42.719,"text":"you're trying to say is you'd like for us to not break it yes","speaker":null,"is_sponsor":0},{"start_s":40.96,"end_s":47.2,"text":"well good luck with that xsplit makes powerful streaming pc apps","speaker":null,"is_sponsor":0},{"start_s":44.96,"end_s":51.28,"text":"for streamers vloggers and more check out their vcam app to change or blur","speaker":null,"is_sponsor":0},{"start_s":49.52,"end_s":55.239,"text":"your background without a green screen learn more at the end of the video","speaker":null,"is_sponsor":0},{"start_s":62.239,"end_s":68.799,"text":"before we go any further we should probably address why anyone would want","speaker":null,"is_sponsor":0},{"start_s":66.479,"end_s":72.96,"text":"to overclock a graphing calculator now one obvious reason is that when you","speaker":null,"is_sponsor":0},{"start_s":70.96,"end_s":77.6,"text":"enter a more complex function in them they can actually take a hot minute to","speaker":null,"is_sponsor":0},{"start_s":75.119,"end_s":81.68,"text":"spit out the results but there are some even more fun and geekier reasons than","speaker":null,"is_sponsor":0},{"start_s":79.52,"end_s":85.92,"text":"that doom playing doom on your calculator in class turns out that's a","speaker":null,"is_sponsor":0},{"start_s":83.92,"end_s":90.799,"text":"thing you can do and the more you overclock it the faster it'll run doy of","speaker":null,"is_sponsor":0},{"start_s":89.04,"end_s":94.799,"text":"course to quantify the benefit of our experiment here we're going to have to","speaker":null,"is_sponsor":0},{"start_s":92.64,"end_s":97.759,"text":"set a baseline so let's get doom installed on this puppy and see how she","speaker":null,"is_sponsor":0},{"start_s":96.88,"end_s":103.04,"text":"runs all right so in order to get programs onto your","speaker":null,"is_sponsor":0},{"start_s":101.2,"end_s":108.0,"text":"calculator you just get ti connect it has not changed since i used in high","speaker":null,"is_sponsor":0},{"start_s":104.72,"end_s":110.479,"text":"school go to send to device all right so","speaker":null,"is_sponsor":0},{"start_s":108.0,"end_s":115.2,"text":"calculator overclocking in here we have doom 2 runs a bit better so let's toss","speaker":null,"is_sponsor":0},{"start_s":112.56,"end_s":119.92,"text":"that on wow the hat animation i remember but the pages and","speaker":null,"is_sponsor":0},{"start_s":118.479,"end_s":124.079,"text":"when you deleted things how the page would just oh my gosh","speaker":null,"is_sponsor":0},{"start_s":124.079,"end_s":130.879,"text":"yeah this is pretty slow to uh render new frames oh i think i got a new","speaker":null,"is_sponsor":0},{"start_s":128.879,"end_s":135.12,"text":"oh pistol bang bang bang bang bang hey back off before he first oh he hit me","speaker":null,"is_sponsor":0},{"start_s":132.8,"end_s":138.64,"text":"yeah these frames render a little on the slow side i can see how this experience","speaker":null,"is_sponsor":0},{"start_s":137.28,"end_s":142.959,"text":"could be enhanced with a faster calculator","speaker":null,"is_sponsor":0},{"start_s":142.959,"end_s":149.2,"text":"that's it eh that's the brain yep we need to find out how much power it's","speaker":null,"is_sponsor":0},{"start_s":147.28,"end_s":151.84,"text":"drawing so that you know you can't design a thermal system","speaker":null,"is_sponsor":0},{"start_s":150.48,"end_s":155.76,"text":"without knowing how much power you're drawing so first thing we need to do is","speaker":null,"is_sponsor":0},{"start_s":153.84,"end_s":160.72,"text":"power it that's flux you're just gonna solder leads to it positive and negative","speaker":null,"is_sponsor":0},{"start_s":158.16,"end_s":164.72,"text":"let's tin some wires here suckas this is nice normally they don't let me","speaker":null,"is_sponsor":0},{"start_s":162.08,"end_s":167.68,"text":"use the soldering iron well oh yeah the soldering that's coming in a bit you are","speaker":null,"is_sponsor":0},{"start_s":166.4,"end_s":171.84,"text":"not doing you can do this one like look at the landing pad you're not doing the harder","speaker":null,"is_sponsor":0},{"start_s":170.319,"end_s":176.319,"text":"ones look at this that i did this morning","speaker":null,"is_sponsor":0},{"start_s":174.239,"end_s":179.76,"text":"that is pretty impressive yeah assuming that it actually still works i have no","speaker":null,"is_sponsor":0},{"start_s":177.92,"end_s":184.48,"text":"clue okay so let's see if i did it right","speaker":null,"is_sponsor":0},{"start_s":182.159,"end_s":187.76,"text":"hey it's live yay","speaker":null,"is_sponsor":0},{"start_s":185.519,"end_s":193.28,"text":"he was a little nervous i saw him okay so i was slightly concerned about this","speaker":null,"is_sponsor":0},{"start_s":190.72,"end_s":196.56,"text":"uh it's drawing so little power that it's not registering on our power supply","speaker":null,"is_sponsor":0},{"start_s":195.76,"end_s":201.84,"text":"here yes so we're gonna have to","speaker":null,"is_sponsor":0},{"start_s":199.36,"end_s":205.84,"text":"calculate it a different way one moment so all we need to do is hook up to our","speaker":null,"is_sponsor":0},{"start_s":203.76,"end_s":209.72,"text":"multimeter which should tell us how much current we're drawing .001","speaker":null,"is_sponsor":0},{"start_s":209.76,"end_s":216.239,"text":"amps can you change the range and see if we can get that a bit more precise","speaker":null,"is_sponsor":0},{"start_s":214.08,"end_s":219.28,"text":"no you know what though i bet what we could","speaker":null,"is_sponsor":0},{"start_s":217.76,"end_s":222.959,"text":"do is actually do something on the calculator so i'm going to take that from you and i'll sanitize my hands","speaker":null,"is_sponsor":0},{"start_s":222.0,"end_s":227.519,"text":"after and then you do something","speaker":null,"is_sponsor":0},{"start_s":225.28,"end_s":233.44,"text":"like run doom for example okay so we're gonna graph now","speaker":null,"is_sponsor":0},{"start_s":230.4,"end_s":234.84,"text":"oh yeah 0.013","speaker":null,"is_sponsor":0},{"start_s":233.44,"end_s":239.599,"text":"is the max 0.091 watts of heat to dissipate","speaker":null,"is_sponsor":0},{"start_s":238.08,"end_s":243.28,"text":"for the total thing including the display so 0.1 watts yeah i think we've","speaker":null,"is_sponsor":0},{"start_s":242.319,"end_s":247.04,"text":"got this and we're taking this one step further","speaker":null,"is_sponsor":0},{"start_s":246.0,"end_s":252.84,"text":"what do you think the temperature is going to be 25 degrees","speaker":null,"is_sponsor":0},{"start_s":250.159,"end_s":257.04,"text":"i was thinking 24 and a half heating up boys i can see it it's","speaker":null,"is_sponsor":0},{"start_s":255.439,"end_s":262.639,"text":"integrating now you got the 24.5 24.5 i saw it 24.6","speaker":null,"is_sponsor":0},{"start_s":261.68,"end_s":267.6,"text":"yeah i win wow","speaker":null,"is_sponsor":0},{"start_s":265.199,"end_s":270.639,"text":"meaningless victory only if you round though i was closer","speaker":null,"is_sponsor":0},{"start_s":269.28,"end_s":274.96,"text":"dang it now that we have our baseline","speaker":null,"is_sponsor":0},{"start_s":272.639,"end_s":279.199,"text":"what do we need to overclock this thing as you can imagine there isn't exactly a","speaker":null,"is_sponsor":0},{"start_s":276.96,"end_s":284.32,"text":"BIOS that you can go into and change the multiplier a wild Anthony appears in our","speaker":null,"is_sponsor":0},{"start_s":282.24,"end_s":288.639,"text":"calculator and many older electronics the CPU speed is regulated by a resistor","speaker":null,"is_sponsor":0},{"start_s":286.479,"end_s":292.32,"text":"capacitor or rc oscillator we'll be simplifying a bit here so if you want a","speaker":null,"is_sponsor":0},{"start_s":290.4,"end_s":295.52,"text":"bit more of a complete explanation go ahead and watch this excellent video","speaker":null,"is_sponsor":0},{"start_s":293.6,"end_s":299.199,"text":"from ben eater basically how an rc oscillator works is you use a transistor","speaker":null,"is_sponsor":0},{"start_s":297.36,"end_s":302.4,"text":"or an op amp to compare the voltage between this capacitor and some voltages","speaker":null,"is_sponsor":0},{"start_s":301.28,"end_s":306.72,"text":"we set so when the voltage of the capacitor is","speaker":null,"is_sponsor":0},{"start_s":304.56,"end_s":310.4,"text":"below a certain threshold power is applied and then it is removed once it","speaker":null,"is_sponsor":0},{"start_s":308.72,"end_s":314.08,"text":"hits that threshold creating an oscillating motion which gives us the","speaker":null,"is_sponsor":0},{"start_s":312.16,"end_s":317.44,"text":"clock of our CPU to overclock in that case all we need to","speaker":null,"is_sponsor":0},{"start_s":316.16,"end_s":323.639,"text":"do is swap this resistor out to change the","speaker":null,"is_sponsor":0},{"start_s":320.639,"end_s":323.639,"text":"threshold","speaker":null,"is_sponsor":0},{"start_s":324.96,"end_s":332.0,"text":"which gives us a much faster rise and fall","speaker":null,"is_sponsor":0},{"start_s":329.28,"end_s":336.24,"text":"we're going to use that with our ti 84 to increase our clock speeds that sounds","speaker":null,"is_sponsor":0},{"start_s":334.16,"end_s":340.08,"text":"easy enough until you see the size of the resistors that we're dealing with","speaker":null,"is_sponsor":0},{"start_s":338.479,"end_s":346.08,"text":"we need to replace r07d","speaker":null,"is_sponsor":0},{"start_s":342.0,"end_s":348.32,"text":"and r08d so these are the two right here","speaker":null,"is_sponsor":0},{"start_s":346.08,"end_s":354.479,"text":"and as you can probably tell by how massive these tweezers look","speaker":null,"is_sponsor":0},{"start_s":351.12,"end_s":356.479,"text":"they are super tiny and i am not excited","speaker":null,"is_sponsor":0},{"start_s":354.479,"end_s":359.84,"text":"about this now this is the part that has the greatest risk of just completely","speaker":null,"is_sponsor":0},{"start_s":358.16,"end_s":363.84,"text":"killing everything so i'm going to have to use the hot air gun while pulling on","speaker":null,"is_sponsor":0},{"start_s":362.08,"end_s":368.319,"text":"the resistor and hope that the resistor that i want to","speaker":null,"is_sponsor":0},{"start_s":365.52,"end_s":372.16,"text":"come off comes off and no other bits do if i slip then i might destroy","speaker":null,"is_sponsor":0},{"start_s":371.36,"end_s":376.319,"text":"it it worked i got it off right there those","speaker":null,"is_sponsor":0},{"start_s":374.88,"end_s":383.039,"text":"are the pads that i have to land the solder on and this is the size of the resistor in","speaker":null,"is_sponsor":0},{"start_s":380.4,"end_s":388.08,"text":"theory we should be able to overclock it with just swapping one so what about we","speaker":null,"is_sponsor":0},{"start_s":386.08,"end_s":391.039,"text":"only swap one see if it works","speaker":null,"is_sponsor":0},{"start_s":389.68,"end_s":395.84,"text":"and then we can swap two and we'll have a larger range of potential overclocking","speaker":null,"is_sponsor":0},{"start_s":396.24,"end_s":402.16,"text":"after the cameras turned off last night i kept on working on this","speaker":null,"is_sponsor":0},{"start_s":401.36,"end_s":407.52,"text":"we had a bit of a problem you know how like you tried it as well yep nothing was","speaker":null,"is_sponsor":0},{"start_s":406.0,"end_s":411.36,"text":"sticking to the pads turns out they were gone yeah totally gone no pads at all","speaker":null,"is_sponsor":0},{"start_s":409.759,"end_s":414.8,"text":"ripped them right off fortunately there's another resistor right next to","speaker":null,"is_sponsor":0},{"start_s":413.039,"end_s":421.12,"text":"it that happens to be wired up in parallel so we were able to solder onto","speaker":null,"is_sponsor":0},{"start_s":417.84,"end_s":423.919,"text":"that one attach the potentiometer and","speaker":null,"is_sponsor":0},{"start_s":421.12,"end_s":429.36,"text":"overclocking works now yeah it works it's not 100 stable at the moment well","speaker":null,"is_sponsor":0},{"start_s":427.68,"end_s":435.759,"text":"that's overclocking for you yeah and i think that the reason for that is that like it needs water cooling","speaker":null,"is_sponsor":0},{"start_s":432.88,"end_s":440.08,"text":"it needs water cooling and also like it's a resistor capacitor thing that","speaker":null,"is_sponsor":0},{"start_s":438.24,"end_s":443.68,"text":"makes this whole clock circuit work yeah and with these long leads here we're","speaker":null,"is_sponsor":0},{"start_s":441.52,"end_s":448.4,"text":"adding capacitance so when we shorten these to like their","speaker":null,"is_sponsor":0},{"start_s":445.919,"end_s":451.199,"text":"final length got it it should be a lot better to make sure i understand","speaker":null,"is_sponsor":0},{"start_s":449.599,"end_s":455.039,"text":"properly it is your intention to continue using this calculator in its","speaker":null,"is_sponsor":0},{"start_s":453.12,"end_s":458.479,"text":"water-cooled overclocked state correct oh yeah it's like it's my calculator and","speaker":null,"is_sponsor":0},{"start_s":457.12,"end_s":465.84,"text":"it's now going to be maybe the coolest calculator in the world and i'll be building the most ridiculous water","speaker":null,"is_sponsor":0},{"start_s":461.919,"end_s":465.84,"text":"cooling loop you ever did see","speaker":null,"is_sponsor":0},{"start_s":467.44,"end_s":472.319,"text":"absolutely perfect would you look at that final block assembly here we go","speaker":null,"is_sponsor":0},{"start_s":471.199,"end_s":477.039,"text":"we're also going to have to make these leads shorter and the other thicker","speaker":null,"is_sponsor":0},{"start_s":475.199,"end_s":481.36,"text":"leads much shorter how short do you want it uh let's not","speaker":null,"is_sponsor":0},{"start_s":479.759,"end_s":485.199,"text":"make it much shorter so that we can shorten it later when we know how long","speaker":null,"is_sponsor":0},{"start_s":483.28,"end_s":489.12,"text":"it needs to be exactly this is the overclocking dial you better not bump","speaker":null,"is_sponsor":0},{"start_s":487.12,"end_s":492.639,"text":"that too far by accident a bump will be like 300 megahertz how are we going to","speaker":null,"is_sponsor":0},{"start_s":491.12,"end_s":498.479,"text":"solder it on even what do you mean well it's going to have to be long enough that we can get at it","speaker":null,"is_sponsor":0},{"start_s":496.72,"end_s":501.199,"text":"before we close it okay we should be able to find it","speaker":null,"is_sponsor":0},{"start_s":500.08,"end_s":505.52,"text":"we shouldn't have cut it we should have just yeah we probably shouldn't have cut it i","speaker":null,"is_sponsor":0},{"start_s":503.599,"end_s":509.199,"text":"knew it i had such a bad feeling about it oh that's quite a good tape job thank","speaker":null,"is_sponsor":0},{"start_s":507.36,"end_s":513.2,"text":"you thank you Linus if anything was going to go horribly wrong it already","speaker":null,"is_sponsor":0},{"start_s":511.199,"end_s":517.36,"text":"would have yeah you better do that better find the","speaker":null,"is_sponsor":0},{"start_s":515.36,"end_s":521.76,"text":"hardest wood possible knock on it for days i think this RGB","speaker":null,"is_sponsor":0},{"start_s":520.159,"end_s":527.2,"text":"reservoir sphere might be the most german thing i've ever filled with water","speaker":null,"is_sponsor":0},{"start_s":524.159,"end_s":530.32,"text":"uh well i forgot that you had the","speaker":null,"is_sponsor":0},{"start_s":527.2,"end_s":531.76,"text":"CPU block and these tubes were just open","speaker":null,"is_sponsor":0},{"start_s":530.32,"end_s":536.08,"text":"on the table and i was sitting here filling the reservoir real focused on","speaker":null,"is_sponsor":0},{"start_s":534.16,"end_s":539.279,"text":"doing a great job of pouring and the table is covered in water now the good","speaker":null,"is_sponsor":0},{"start_s":538.0,"end_s":542.959,"text":"news is i think i've got a better idea for how to fill it now oh","speaker":null,"is_sponsor":0},{"start_s":541.279,"end_s":547.44,"text":"just look at the block size compared to what we're actually cooling","speaker":null,"is_sponsor":0},{"start_s":545.6,"end_s":551.519,"text":"that is about as riced out as a calculator it could be","speaker":null,"is_sponsor":0},{"start_s":550.0,"end_s":555.2,"text":"oh there we go all right now oh there you go","speaker":null,"is_sponsor":0},{"start_s":553.44,"end_s":559.279,"text":"is it actually circulating water in there though it doesn't look like it","speaker":null,"is_sponsor":0},{"start_s":557.839,"end_s":563.44,"text":"well we better go fast we don't want it to overheat while there's no water flow","speaker":null,"is_sponsor":0},{"start_s":561.04,"end_s":566.959,"text":"what is coming through oh okay good enough this thing's horrible don't","speaker":null,"is_sponsor":0},{"start_s":565.44,"end_s":570.399,"text":"buy it she did it","speaker":null,"is_sponsor":0},{"start_s":568.48,"end_s":575.04,"text":"yes we have a water cooled calculator","speaker":null,"is_sponsor":0},{"start_s":572.72,"end_s":578.32,"text":"we do yeah absolutely amazing you know the funny thing is we're gonna go and","speaker":null,"is_sponsor":0},{"start_s":576.48,"end_s":582.64,"text":"play doom again and it took so long to get this done i'm not gonna remember if","speaker":null,"is_sponsor":0},{"start_s":580.16,"end_s":586.08,"text":"there's any difference i don't make this might actually be running faster oh","speaker":null,"is_sponsor":0},{"start_s":584.64,"end_s":592.16,"text":"it definitely is it's actually like noticeably faster","speaker":null,"is_sponsor":0},{"start_s":590.48,"end_s":597.68,"text":"this like dramatically exceeds my expectations","speaker":null,"is_sponsor":0},{"start_s":595.519,"end_s":602.48,"text":"look at this like i can actually kind of move around","speaker":null,"is_sponsor":0},{"start_s":599.519,"end_s":607.44,"text":"that's crazy because that difference is from 16 to","speaker":null,"is_sponsor":0},{"start_s":605.16,"end_s":612.399,"text":"18.7 megahertz we can try and get just a tiny bit more","speaker":null,"is_sponsor":0},{"start_s":609.12,"end_s":614.8,"text":"and see what it's like doing a live","speaker":null,"is_sponsor":0},{"start_s":612.399,"end_s":617.44,"text":"speed increase is it still running yeah","speaker":null,"is_sponsor":0},{"start_s":616.399,"end_s":623.04,"text":"okay let's just try and take in time before oh yeah it's faster it's faster","speaker":null,"is_sponsor":0},{"start_s":619.76,"end_s":623.04,"text":"loading that map there son","speaker":null,"is_sponsor":0},{"start_s":623.12,"end_s":628.16,"text":"look at here all right let's let's take it a tiny bit","speaker":null,"is_sponsor":0},{"start_s":626.56,"end_s":634.72,"text":"further let's see when it becomes unstable wow look how quickly","speaker":null,"is_sponsor":0},{"start_s":632.079,"end_s":639.36,"text":"it's loading now oh yeah that's like this is this is a big difference","speaker":null,"is_sponsor":0},{"start_s":637.279,"end_s":643.92,"text":"it seems to be taking it let's just push it until it's you know not stable","speaker":null,"is_sponsor":0},{"start_s":641.12,"end_s":648.24,"text":"anymore these are basically loading pretty much","speaker":null,"is_sponsor":0},{"start_s":644.839,"end_s":648.24,"text":"instantly wow","speaker":null,"is_sponsor":0},{"start_s":650.44,"end_s":655.6,"text":"26.8 damn","speaker":null,"is_sponsor":0},{"start_s":653.76,"end_s":659.519,"text":"so the reason why it's getting so garbled is definitely because","speaker":null,"is_sponsor":0},{"start_s":657.839,"end_s":664.24,"text":"it's not stable it's not stable then also it's like","speaker":null,"is_sponsor":0},{"start_s":662.0,"end_s":669.76,"text":"the flash for some of the cycles is just not there 26 megahertz that's a whole 10","speaker":null,"is_sponsor":0},{"start_s":667.839,"end_s":674.72,"text":"megahertz faster than before 10 million hertz if you guys enjoyed","speaker":null,"is_sponsor":0},{"start_s":672.399,"end_s":680.48,"text":"this video you might also enjoy the series where alex and i go through the","speaker":null,"is_sponsor":0},{"start_s":677.519,"end_s":685.6,"text":"grueling process of water cooling a red 8k camera that one was very frustrating","speaker":null,"is_sponsor":0},{"start_s":683.76,"end_s":688.72,"text":"but as long as it's entertaining for you guys it's totally worth it right yeah","speaker":null,"is_sponsor":0},{"start_s":687.6,"end_s":693.519,"text":"right i wasn't sure what he was going to say i'd like to thank everyone that helped","speaker":null,"is_sponsor":0},{"start_s":691.68,"end_s":698.24,"text":"us out on this particularly the people on the chem tech forums","speaker":null,"is_sponsor":0},{"start_s":695.36,"end_s":703.68,"text":"rs barges aka dr dinar and christopher michael aka kerm martin also virtual","speaker":null,"is_sponsor":0},{"start_s":700.88,"end_s":707.279,"text":"flak cad for the sick ti-84 model and of course tex instruments for","speaker":null,"is_sponsor":0},{"start_s":705.68,"end_s":710.959,"text":"the well the calculators that we didn't end up using but they still sent them it","speaker":null,"is_sponsor":0},{"start_s":708.72,"end_s":715.68,"text":"was nice thanks to xsplit for sponsoring today's video xsplit's vcam can remove","speaker":null,"is_sponsor":0},{"start_s":713.44,"end_s":719.44,"text":"replace and blur your background without a green screen it works with any webcam","speaker":null,"is_sponsor":0},{"start_s":717.92,"end_s":722.8,"text":"and there's no need for complicated lighting setups it uses ai to","speaker":null,"is_sponsor":0},{"start_s":721.6,"end_s":728.72,"text":"automatically know the difference between you and your background and you can customize the background to pretty","speaker":null,"is_sponsor":0},{"start_s":726.16,"end_s":734.959,"text":"much anything you want vcamp works with other xsplit broadcast tools but also","speaker":null,"is_sponsor":0},{"start_s":731.2,"end_s":736.88,"text":"obs slack skype and more they've got 24","speaker":null,"is_sponsor":0},{"start_s":734.959,"end_s":742.0,"text":"7 support and lifetime updates and it costs as little as 9.95 usd for a three","speaker":null,"is_sponsor":0},{"start_s":739.839,"end_s":746.72,"text":"month license or you can get a lifetime license for 40 bucks use offer code","speaker":null,"is_sponsor":0},{"start_s":744.399,"end_s":750.639,"text":"Linus tech tips to get 10 off at the link in the video description i'm very","speaker":null,"is_sponsor":0},{"start_s":749.12,"end_s":756.0,"text":"happy about this it's my new favorite thing you know what you should totally do is pull a that","speaker":null,"is_sponsor":0},{"start_s":754.8,"end_s":759.68,"text":"stupid manufacturer say water cooled RAM where","speaker":null,"is_sponsor":0},{"start_s":757.92,"end_s":763.279,"text":"it just like has water in it and just put plugs in it and just fill the block","speaker":null,"is_sponsor":0},{"start_s":761.44,"end_s":765.6,"text":"with water oh that was my plan oh nice i love it","speaker":null,"is_sponsor":0}],"full_text":"did you know that you can overclock a graphing calculator for fun and profit yeah so we called up texas instruments and we're like hey guys can you send us some calculators to overclock so they sent us this one which this doesn't look like a calculator like it does that looks exactly like a calculator what are you talking about but it doesn't look like the calculator no it's not the calculator so we actually had to go digging through alex's sentimental drawer where we found the very ti 84 plus that got him most of the way through engineering school and also most of this job so i guess what you're trying to say is you'd like for us to not break it yes well good luck with that xsplit makes powerful streaming pc apps for streamers vloggers and more check out their vcam app to change or blur your background without a green screen learn more at the end of the video before we go any further we should probably address why anyone would want to overclock a graphing calculator now one obvious reason is that when you enter a more complex function in them they can actually take a hot minute to spit out the results but there are some even more fun and geekier reasons than that doom playing doom on your calculator in class turns out that's a thing you can do and the more you overclock it the faster it'll run doy of course to quantify the benefit of our experiment here we're going to have to set a baseline so let's get doom installed on this puppy and see how she runs all right so in order to get programs onto your calculator you just get ti connect it has not changed since i used in high school go to send to device all right so calculator overclocking in here we have doom 2 runs a bit better so let's toss that on wow the hat animation i remember but the pages and when you deleted things how the page would just oh my gosh yeah this is pretty slow to uh render new frames oh i think i got a new oh pistol bang bang bang bang bang hey back off before he first oh he hit me yeah these frames render a little on the slow side i can see how this experience could be enhanced with a faster calculator that's it eh that's the brain yep we need to find out how much power it's drawing so that you know you can't design a thermal system without knowing how much power you're drawing so first thing we need to do is power it that's flux you're just gonna solder leads to it positive and negative let's tin some wires here suckas this is nice normally they don't let me use the soldering iron well oh yeah the soldering that's coming in a bit you are not doing you can do this one like look at the landing pad you're not doing the harder ones look at this that i did this morning that is pretty impressive yeah assuming that it actually still works i have no clue okay so let's see if i did it right hey it's live yay he was a little nervous i saw him okay so i was slightly concerned about this uh it's drawing so little power that it's not registering on our power supply here yes so we're gonna have to calculate it a different way one moment so all we need to do is hook up to our multimeter which should tell us how much current we're drawing .001 amps can you change the range and see if we can get that a bit more precise no you know what though i bet what we could do is actually do something on the calculator so i'm going to take that from you and i'll sanitize my hands after and then you do something like run doom for example okay so we're gonna graph now oh yeah 0.013 is the max 0.091 watts of heat to dissipate for the total thing including the display so 0.1 watts yeah i think we've got this and we're taking this one step further what do you think the temperature is going to be 25 degrees i was thinking 24 and a half heating up boys i can see it it's integrating now you got the 24.5 24.5 i saw it 24.6 yeah i win wow meaningless victory only if you round though i was closer dang it now that we have our baseline what do we need to overclock this thing as you can imagine there isn't exactly a BIOS that you can go into and change the multiplier a wild Anthony appears in our calculator and many older electronics the CPU speed is regulated by a resistor capacitor or rc oscillator we'll be simplifying a bit here so if you want a bit more of a complete explanation go ahead and watch this excellent video from ben eater basically how an rc oscillator works is you use a transistor or an op amp to compare the voltage between this capacitor and some voltages we set so when the voltage of the capacitor is below a certain threshold power is applied and then it is removed once it hits that threshold creating an oscillating motion which gives us the clock of our CPU to overclock in that case all we need to do is swap this resistor out to change the threshold which gives us a much faster rise and fall we're going to use that with our ti 84 to increase our clock speeds that sounds easy enough until you see the size of the resistors that we're dealing with we need to replace r07d and r08d so these are the two right here and as you can probably tell by how massive these tweezers look they are super tiny and i am not excited about this now this is the part that has the greatest risk of just completely killing everything so i'm going to have to use the hot air gun while pulling on the resistor and hope that the resistor that i want to come off comes off and no other bits do if i slip then i might destroy it it worked i got it off right there those are the pads that i have to land the solder on and this is the size of the resistor in theory we should be able to overclock it with just swapping one so what about we only swap one see if it works and then we can swap two and we'll have a larger range of potential overclocking after the cameras turned off last night i kept on working on this we had a bit of a problem you know how like you tried it as well yep nothing was sticking to the pads turns out they were gone yeah totally gone no pads at all ripped them right off fortunately there's another resistor right next to it that happens to be wired up in parallel so we were able to solder onto that one attach the potentiometer and overclocking works now yeah it works it's not 100 stable at the moment well that's overclocking for you yeah and i think that the reason for that is that like it needs water cooling it needs water cooling and also like it's a resistor capacitor thing that makes this whole clock circuit work yeah and with these long leads here we're adding capacitance so when we shorten these to like their final length got it it should be a lot better to make sure i understand properly it is your intention to continue using this calculator in its water-cooled overclocked state correct oh yeah it's like it's my calculator and it's now going to be maybe the coolest calculator in the world and i'll be building the most ridiculous water cooling loop you ever did see absolutely perfect would you look at that final block assembly here we go we're also going to have to make these leads shorter and the other thicker leads much shorter how short do you want it uh let's not make it much shorter so that we can shorten it later when we know how long it needs to be exactly this is the overclocking dial you better not bump that too far by accident a bump will be like 300 megahertz how are we going to solder it on even what do you mean well it's going to have to be long enough that we can get at it before we close it okay we should be able to find it we shouldn't have cut it we should have just yeah we probably shouldn't have cut it i knew it i had such a bad feeling about it oh that's quite a good tape job thank you thank you Linus if anything was going to go horribly wrong it already would have yeah you better do that better find the hardest wood possible knock on it for days i think this RGB reservoir sphere might be the most german thing i've ever filled with water uh well i forgot that you had the CPU block and these tubes were just open on the table and i was sitting here filling the reservoir real focused on doing a great job of pouring and the table is covered in water now the good news is i think i've got a better idea for how to fill it now oh just look at the block size compared to what we're actually cooling that is about as riced out as a calculator it could be oh there we go all right now oh there you go is it actually circulating water in there though it doesn't look like it well we better go fast we don't want it to overheat while there's no water flow what is coming through oh okay good enough this thing's horrible don't buy it she did it yes we have a water cooled calculator we do yeah absolutely amazing you know the funny thing is we're gonna go and play doom again and it took so long to get this done i'm not gonna remember if there's any difference i don't make this might actually be running faster oh it definitely is it's actually like noticeably faster this like dramatically exceeds my expectations look at this like i can actually kind of move around that's crazy because that difference is from 16 to 18.7 megahertz we can try and get just a tiny bit more and see what it's like doing a live speed increase is it still running yeah okay let's just try and take in time before oh yeah it's faster it's faster loading that map there son look at here all right let's let's take it a tiny bit further let's see when it becomes unstable wow look how quickly it's loading now oh yeah that's like this is this is a big difference it seems to be taking it let's just push it until it's you know not stable anymore these are basically loading pretty much instantly wow 26.8 damn so the reason why it's getting so garbled is definitely because it's not stable it's not stable then also it's like the flash for some of the cycles is just not there 26 megahertz that's a whole 10 megahertz faster than before 10 million hertz if you guys enjoyed this video you might also enjoy the series where alex and i go through the grueling process of water cooling a red 8k camera that one was very frustrating but as long as it's entertaining for you guys it's totally worth it right yeah right i wasn't sure what he was going to say i'd like to thank everyone that helped us out on this particularly the people on the chem tech forums rs barges aka dr dinar and christopher michael aka kerm martin also virtual flak cad for the sick ti-84 model and of course tex instruments for the well the calculators that we didn't end up using but they still sent them it was nice thanks to xsplit for sponsoring today's video xsplit's vcam can remove replace and blur your background without a green screen it works with any webcam and there's no need for complicated lighting setups it uses ai to automatically know the difference between you and your background and you can customize the background to pretty much anything you want vcamp works with other xsplit broadcast tools but also obs slack skype and more they've got 24 7 support and lifetime updates and it costs as little as 9.95 usd for a three month license or you can get a lifetime license for 40 bucks use offer code Linus tech tips to get 10 off at the link in the video description i'm very happy about this it's my new favorite thing you know what you should totally do is pull a that stupid manufacturer say water cooled RAM where it just like has water in it and just put plugs in it and just fill the block with water oh that was my plan oh nice i love it"}