I have an atmega168 driving 4 different buffered outputs (voltage follower opamp with single rail supply powered from gnd and +5).
I also want to put leds on these four outputs to show their logic status.
Should I put the leds+current limit resistor to the uC pin (before the opamp buffer?
OR connect it to the opamp buffer output?
OR connect it to the uC output via a BJT?
I also want to put leds on these four outputs to show their logic status.
Should I put the leds+current limit resistor to the uC pin (before the opamp buffer?
OR connect it to the opamp buffer output?
OR connect it to the uC output via a BJT?