This is another project I am making for my movie making friends.
It is a high power RGB fader. This should put out up to 1,200 lm when displaying white.
The RC network before the opamps will be charged via a Basic Stamp command and the opamp outputs go to the transistors. I could just pick an NPN of a high enough current value to work but was wondering if there is anyway to do better than that? What other things should I consider? Heat needs to stay as low as possible. The switch will ground the RC network through a resistor allowing the User to fade all LEDs out. And the way I write the program should allow the LEDs to fade back on once released. Anyone know where to get a 3pdt switch?
Thanks guys!
It is a high power RGB fader. This should put out up to 1,200 lm when displaying white.
The RC network before the opamps will be charged via a Basic Stamp command and the opamp outputs go to the transistors. I could just pick an NPN of a high enough current value to work but was wondering if there is anyway to do better than that? What other things should I consider? Heat needs to stay as low as possible. The switch will ground the RC network through a resistor allowing the User to fade all LEDs out. And the way I write the program should allow the LEDs to fade back on once released. Anyone know where to get a 3pdt switch?
Thanks guys!
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