Reply to "LEDS lights"

Vernon BarryOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

That is clearly an incandescent grain of wheat bulb. I can see the filament.

KA317 is the LM317 equivalent. That device can either be used in constant voltage or constant current mode but given incandescent bulbs, and not maxing the voltage out- indicates likely CV mode.

Given the low measured regulated voltage of 6.7V and being white LEDS typically are above 3V, putting them in series output is right on that limit of possibly not working. So for 20mA I get a 165 Ohm resistor. Or if running the 2 LEDS in parallel and single resistor, then roughly 100-82 Ohms.

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11/28/2210:56 PM

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