The World’s Largest 555 Timer… Again!

PCBWay is having a great Winter sale now, check it out here: https://www.pcbway.com/ We’re going back to an old one - the venerable vacuum tube 555 timer. This was a really fun project we took on a while back to try to make a 555 timer out of just vacuum tubes, and while the prototype made at home on the mill was excellent in every sense of the word, we were struggling coming up with a more professional looking version. Well, fear not, our sponsor PCBWay is here! PCBWay hooked me up with some pretty righteous PCBs, so let’s take a look at what they sent and see if we can get the new and improved 555 going. Everything on the 555 timer is available here: https://github.com/Nakazoto/ue555 Notably, here’s the link to the datasheet: https://github.com/Nakazoto/ue555/blo... And here’s the link to the gerber files: https://github.com/Nakazoto/ue555/tre... If you need tubes, I strongly suggest either 6AU6 or the 6CB6, both work brilliantly. Just search eBay or your local auction site for “6AU6 lot” or “6CB6 lot.” The 7-pin sockets can be found on most online retailers like Amazon or AliExpress. Just search for “7 pin tube socket” and look for the ones that are PCB mount. If you want to support the channel please hop over to Patreon:   / usagielectric   Also, we now have some epic shirts for sale! https://my-store-11554688.creator-spr... Come join us on Discord and Twitter! Discord:   / discord   Twitter:   / usagielectric   Intro Music adapted from: Artist: The Runaway Five Title: The Shinra Shuffle https://ocremix.org/remix/OCR01847 Thanks for watching! Chapters 0:00 A look back at the OG 555 1:28 The new hotness 2:30 A close look at the new PCBs 5:14 Let’s build it 7:50 A close look at the datasheet 9:10 Tuning the OpAmps 13:01 Testing: Schmitt Trigger 14:24 Testing: Astable oscillator 16:46 How do you get one? 18:53 What’s next? (The CSS555!) 21:49 Bunny!