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Will 5v to the ground... EE help with RGB Topfire... see post #22

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Bender:

--- Quote from: BobA on January 20, 2011, 10:27:43 am ---If you changed the LED to a common cathode

--- End quote ---

how would one do that?

Popcorrin:

--- Quote from: Bender on January 20, 2011, 05:59:56 pm ---
--- Quote from: BobA on January 20, 2011, 10:27:43 am ---If you changed the LED to a common cathode

--- End quote ---

how would one do that?

--- End quote ---

They sell common cathode led's, but like BobA said, you run into the problem with the LED Wiz then. 

Popcorrin:
What might be the easiest is run 5 volts up your orange wire and then when you press the button it would send 5V down your black wire which would then go to a 5v relay or a transistor to close the circuit for button 1.

Popcorrin:
Here's an altered pic.  After thinking about it though, a relay might not be responsive enough, probably better to use a transistor.

Bender:
if I used a 5v transistor how would I wire it, it's got 3 contacts right?
Please explain as you would I child... a slow dim-witted child




I think this is the right diagram for a transistor switch
how would I wire the B,C,E to my setup?

ok I think my black wire goes to C, E to the ground and B to the encoder button 1?
do I need a resistor between B and the encoder? am I even close?

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