Hi TO ALL
I HAVE GOT A PIC16F767 THAT HAS 3 HARDWARE PWM. I HAVE GOT THIS DRIVING 1 X 3 WATT RGB. WHAT I WOULD LIKE TO DO IS DRIVE 4 OR MORE 3WATT RGB LEDs.
I HAVE A FEW TIP41 TRANSISTORS LAYING AROUND COULD I US 3 OF THEM, 1 PER COLOR.EACH LED HAS ITS OWN CURRENT REGULATOR CIRCUIT.
THE TIP41 IS REATED AS FOLLOWS:
COLLECTOR BASE 40V
COLLECTOR EMITTER 40V
EMMITTER BASE 5V
COLLECTOR CURRENT 6A
BASE CURRENT 2A
A PIC CAN DELIVER 20mA AT THE PIN, BUT THE TIP41 REQUIRES 2A.
I HAVE LOOKED AT CIRCUITS FOR TRANSISTORS AS A SWITCH BUT CAN'T FIGURE OUT
WHAT RESISTOR TO USE ON THE BASE.
DAVID
I HAVE GOT A PIC16F767 THAT HAS 3 HARDWARE PWM. I HAVE GOT THIS DRIVING 1 X 3 WATT RGB. WHAT I WOULD LIKE TO DO IS DRIVE 4 OR MORE 3WATT RGB LEDs.
I HAVE A FEW TIP41 TRANSISTORS LAYING AROUND COULD I US 3 OF THEM, 1 PER COLOR.EACH LED HAS ITS OWN CURRENT REGULATOR CIRCUIT.
THE TIP41 IS REATED AS FOLLOWS:
COLLECTOR BASE 40V
COLLECTOR EMITTER 40V
EMMITTER BASE 5V
COLLECTOR CURRENT 6A
BASE CURRENT 2A
A PIC CAN DELIVER 20mA AT THE PIN, BUT THE TIP41 REQUIRES 2A.
I HAVE LOOKED AT CIRCUITS FOR TRANSISTORS AS A SWITCH BUT CAN'T FIGURE OUT
WHAT RESISTOR TO USE ON THE BASE.
DAVID