Haha pretty much
Interesting approach, never thought about using the cable for something completely unrelated.
Thanks, that’s pretty much exactly what I found: https://en.wikipedia.org/wiki/USB_hardware#Allowable_current_draw
I’ve actually done that with a simple single diode rectifier and a supercap with zener voltage limitation:
If your supercap has a too low series resistance for the LED to light immediately you need an additional resistor in series with it. It is simple and small enough to directly fit inside the original lamp casing and has been working without a problem for over 3 years.
That’s true, they explain this in a different video: https://www.youtube.com/watch?v=y9vXDy_zt4I
Yeah, it’s not really getting easier…
It indeed is, but there seem to be no testers available for resistance measurements.
Your solution may very well also work, good thinking. A few things to consider though: