Hi, I have a lamp with a constant current LED driver, which won't dim on the AC side, and has no ports for controlling output. So I just made a 555 PWM controller in parallel with the COB LED to drive a portion of the current onto a wire-wound resistor load. As I've never made anything like this before, and don't have an oscilloscope, is there anything I should be worried about between simulation and reality?
Electrolytic cap is rated 25V, and the load 10W. Ceramic caps and metal-film resistors for the rest.
CC LED driver voltage range is 4-16V, output 350mA
COB LED is running at 15.8V connected alone to driver
Diodes used were 1N4148, not 1N4149 as indicated
Cheers,
Ed
*edit - helps if I upload the circuit diagram
Electrolytic cap is rated 25V, and the load 10W. Ceramic caps and metal-film resistors for the rest.
CC LED driver voltage range is 4-16V, output 350mA
COB LED is running at 15.8V connected alone to driver
Diodes used were 1N4148, not 1N4149 as indicated
Cheers,
Ed
*edit - helps if I upload the circuit diagram
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