Voltage regulator from 1 LED 4 Uncategorized December 25, 2021 January 20, 2022Voltage regulator from 1 LED Voltage regulator from 1 LED from electronics View Reddit by ScienceDiscoverer – View Source
LEDs make pretty poor voltage references because the forward voltage depends on temperature (exponentially) and the current through the diode.
So this is a cute hack but not really something actually usable if you care about the voltage regulation.
I had that multimetr quite a long time ago.
Served me well, but now when I have a better one I would never switch back.
Woohoo, shunt regulator!
Nicely done.
I can’t see if there’s a decimal point or not, is that 600 or 60mA running through the LED? Wouldn’t running 600mA through an LED make it rather … not long for this world? I thought even 60mA was a lot for a single LED, particularly a red one.