I'd never built a joule thief until today - so here's 30 minutes of joule thief shenanigans.
Big Clive's How to make an Authentic Joule Thief - https://www.youtube.com/watch?v=K53beWYdIpc
Big Clive's How to make an Authentic Joule Thief - https://www.youtube.com/watch?v=K53beWYdIpc
What a weird circuit! On mine the LED is oscillating on for a few seconds and then off for a few minutes. I'm guessing it's because not enough windings around my paper tube core. Ran out of wire.
My first functioning joule thief circuit today (no toroid, simply wound around a 1 cm diameter paper tube, if you must know), me all happy looking at the waveform on my DSO-138 when Julian let's out with "DSO-138 just won't work in this case." Nooby smile go to nooby frown.
The CFL bulbs don't last here in the USA either where we have 120volts.
What happens to brightness and current consumption when a fresh new battery is used?
I've been ruining Electronics since the early 60s but I've learned more about Electronics since I discovered Julian's videos then I have in the last 50 years. Nice job man!
That is awesome how you built the inductor onto that breadboard friendly header!! Nice!
don't kill the dipole. if you can switch fast enough, you can do it. unipolar pulsing.
This is a useful demonstration of back EMF from an inductor.
Suggest that you wind only one length of wire and after ten turns or so make a loop and then keep winding in the same direction and that will make your center tap without the mucking around. So much easier
its a center tap transformer not an inductor
You missed out on the whole point of the exercise. You should have measured the current in each experiment as the number of turns affects the efficiency of the circuit.
I am wondering if the scope's 1M ohm input impedance loads the circuit down enough so that you only saw 10 volts?
Excellent video 😎👌 now then can you make a video on how to build an ammeter.