There is a piece of programmable RGB ribbon. The management is done with the WS2801 chip. (for a detailed description www.adafruit.com/datasheets/WS2801.pdf
). You want to pull the led, and instead to connect the segment of the tape (with its own power supply).
Picture the desired result is attached.
The problem is that I don't know what scheme I is more suitable (red or green) and what is the transistor you need ( well, I'm not strong in this, so please help). I only know that the maximum length for the segments that will be inserted after the transistors, is 2 meters.
Tape consumes = 0,06 mA (each led) x 64 (number of LEDs on 2 metres of segment) = 3,84 A.
So the transistor must be able to withstand 4A. Power on the tape either 5 or 12 volts.
Yet as far as I remember, they need a resistor, but I could be wrong.
If I do something wrong or made a mistake do not judge strictly. Please help this is not difficult. Thank you.