Teensy Voltage Divider

Thread Starter

rpschultz

Joined Nov 23, 2022
416
Hi,

I'm working on a Teensy circuit to measure audio frequency input. See schematic of what is recommended. It wants a bias voltage of 0.6v at the Teensy input. I understand why it's 0.6v at point A, but I don't get how it is also 0.6v at the Teensy Input. Please explain.

Thanks!

TeensyVoltageDivider.png
 

BobTPH

Joined Jun 5, 2013
8,661
It depends on the input impedance of “teensy input.” If it is 1M, there is very little drop across R3. If it is 47K, the voltage is halved.
 
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