Hello all,
I have couple of large LED modules laying around that I would like to control with a transistor and a 595 shift register. They use 12v and supposed to pull 160mA but usually pull 200mA. The spec sheet and schematic are attached.
-My first question: is this possible? (judging by this forum thread, it doesnt look good)
-If this can work, what setup do I need with the transistor and base resistor? I've tried a 2n2222A and various resistors. Ideally, I would like a 1k ohm + to limit the load on the shift register, but I've found it takes a lower ohm resistor to make the LED module to pull it's 160mA's.
Spec Sheet 1: http://img7.imageshack.us/img7/914/cci03102009000002.jpg
Spec Sheet 2: http://img7.imageshack.us/img7/9068/cci0310200900001.jpg
Schematic:
I have couple of large LED modules laying around that I would like to control with a transistor and a 595 shift register. They use 12v and supposed to pull 160mA but usually pull 200mA. The spec sheet and schematic are attached.
-My first question: is this possible? (judging by this forum thread, it doesnt look good)
-If this can work, what setup do I need with the transistor and base resistor? I've tried a 2n2222A and various resistors. Ideally, I would like a 1k ohm + to limit the load on the shift register, but I've found it takes a lower ohm resistor to make the LED module to pull it's 160mA's.
Spec Sheet 1: http://img7.imageshack.us/img7/914/cci03102009000002.jpg
Spec Sheet 2: http://img7.imageshack.us/img7/9068/cci0310200900001.jpg
Schematic: