I don't know why we're still talking about dacs. Are you saying you want to use a micro-controller that has PWM capability to drive a dac that uses PWM to drive a transistor? <- rhetorical question in case you were wonderingMotoFab wrote:Output pins from processors also typically only drive 20mA, and must be connected to a driver transistor to make a PWM signal that can drive something practical.
In the same way, usual practice puts a current buffer transistor after the high impedance DAC output pin to serve as the DAC driver. Which is identical to the usual practice putting a current buffer transistor after the processor output pin to serve as a the PWM driver.
It seems like part of this circuit is redundant, but I can't figure out which part.
Hip Hip Hooray for turning this thread into a pointless argument. lmao