Remote Living > Lighting

16+ Volts on LED lighting

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OperaHouse:
There are adjustable current versions for a little more money. http://www.ebay.com/itm/DC-DC-Buck-Converter-Module-LM2596-Constant-Current-Voltage-Adjustable-Module-/191015464867?hash=item2c7968afa3

If electronically inclined, a standard 2596 module can also be used.  The regulators sense voltage is 1.25V.  A resistor can be chosen  that produces 1.25V at the desired current in the negative lead.  The sense lead from the resistor goes to the low side of the sense pot.   At about 400ma a half watt is wasted in the resistor.

For a little less loss a PNP resistor can be used to sense on the positive LED side instead

Harold in CR:

 Last night I bought a 10 pack of the devices you recommended. Figured, if I have questions, YOU da man. !!   ;D ;D  Hope to have them before Xmas.

 Thank You

DanG:
I've used the CC-CV modules on 10w LED's, up to four units off a laptop power brick... These 8-amp 12/24V PWM twist-knob dimmers http://www.ebay.com/itm/New-LED-Light-Lamp-Strip-Dimmer-Brightness-Adjustable-Control-12-24V-8A-/140968532494 can be used two or three per power source, downstream from the CC-CV modules, but get limited by their own line noise.

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