Josey
Flashlight Enthusiast
I'm building a 12V multi-LED light and need to control the voltage so I don't overdrive the bulbs. Most people simply use a resistor, but that consumes energy. I'm off-grid and have only solar power, so efficiency is important, at least in the winter. Plus, my household voltage varies from 12.2V to 14.5V during the course of the day, so no resistor value will be correct for all voltage conditions.
I used to know a simple circuit that uses a zener diode and a transistor to control voltage without consuming much energy and without much reguard to small changes in input voltage. But I can't remember it and can't find my old notes.
Can anybody help? Thanks.
Josey
I used to know a simple circuit that uses a zener diode and a transistor to control voltage without consuming much energy and without much reguard to small changes in input voltage. But I can't remember it and can't find my old notes.
Can anybody help? Thanks.
Josey