hi guys
i want to make a small led brightness controller, the leds are already in strips on a seperate board, runs of 12v at the moment.
a friend recommended that i look into pwm brightness control. i have done a bit of reading, and looked into control with a pic as well. i will have to control 2 sets of leds seperately, so the blue can be brighter at night and the white brighter during the day.
i had setup something like this..
555 timer -> 4017 -> (pin1: 400ohm) -> 555 timer pin 6
-> (pin2: 300ohm) ->
-> (pin3: 200ohm) ->
i had hoped that the different resistors on the 4017 outputs would change the timing amount on the 2nd 555.. in crocodile clips i could not get it to work.
any ideas guys?
i want to make a small led brightness controller, the leds are already in strips on a seperate board, runs of 12v at the moment.
a friend recommended that i look into pwm brightness control. i have done a bit of reading, and looked into control with a pic as well. i will have to control 2 sets of leds seperately, so the blue can be brighter at night and the white brighter during the day.
i had setup something like this..
555 timer -> 4017 -> (pin1: 400ohm) -> 555 timer pin 6
-> (pin2: 300ohm) ->
-> (pin3: 200ohm) ->
i had hoped that the different resistors on the 4017 outputs would change the timing amount on the 2nd 555.. in crocodile clips i could not get it to work.
any ideas guys?