Quote:
Originally Posted by mytimeyet
Here is a site that can figure out what resistors to add to a circuit to light up LEDs from any DC power supply.
Alan Parekh's Electronic Projects - LED Resistor Calculator
Actually bare LEDs with proper resisters in series will work with AC voltage as well, they will light on the FWD side of the AC sine wave. @ 60Hz this is hard for human eyes to detect. Not that I would recommend plugging a low voltage wire system into the wall... Just that a cheap landscape/AirCon/doorbell transformer without rectifier or filter will work fine. |
Looks like a good resource. This stuff is tricky. Perusing that page leads me to wonder if LEDs react differently to more current (I mean amps, not volts) than is needed than do traditional resistors. And perhaps those rules are different for AC v. DC.
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