I saw these LED filaments on Big Clive’s channel and wanted to do a project with them. As always we’re sponsored by https://www.PCBWay.com/?from=atomic

The only problem is they need more than 40volts to light up and I didn’t fancy messing around with mains power… So I thought it would be fun to build a DC boost circuit to go from USB 5v up to a nice 50v.

It works pretty well, I’ve also done a quick simulation of the circuit using ngspice in KiCad which works surprisingly well and pretty much matches the real-world performance.

Even better, I only destroyed one of my ESP32 boards in the process…

0:00 Why are we here? (pretty deep eh?) 0:28 KiCad DC boost circuit simulation 3:36 Does it work in the real world? 7:20 How can we control the output voltage? 9:44 Wiring up our feedback circuit and testing it 12:26 Addendum

These are the LED filaments that I got (affiliate link): https://s.click.aliexpress.com/e/_AX9l74

Update: I just noticed that you can now get 3v versions (affiliate link): https://s.click.aliexpress.com/e/_AVLHsm - also mentioned on Big Clive’s channel - though his all arrived broken… https://youtu.be/tykxeuyfX5Q?t=525

Patreon: https://www.patreon.com/atomic14 ko-fi: https://ko-fi.com/atomic14