Hello.
I don't know whenever this is the proper place to ask, so forgive me, if not.
The single led has characteristic current/voltage dependence curve, based on which, it is quite easy to determine the working voltage, even without knowing the working current - just begin slowly increasing the voltage, while monitoring the current, and when there's a sharp increase in current, here we are. LCR-T4 and similar testers can do this for a single led quite reliably. But I very often encounter strings of unknown number of leds, mostly 3-30 in series, which might have any (also unknown) working current, starting from 5mA to 1A most commonly.
I do have some high voltage lab power supplies, which I'm using for that measurement purposes, but it requires considerable amount of time, so I'd like to have some automated tool for that.
Are there any readily available or simple to make solutions for that?
Thanks in advance!