How come does the minigen output a 1.5V offset with its waveform? Is it from the voltage divider R6 and R7 or R9 and R10?
NOTE: The output is at a DC offset of Vcc/2, however neither the offset nor the amplitude can be varied. By default, the MiniGen ships configured with a 3.3V regulator enabled and should only be used with 3.3V signals (or 3.3V Pro Minis if you are using this as a shield) unless the jumper on the back is soldered over to bypass the regulator for 5V use
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Hi, Russell,
Thank you for your response. Yes, I understand that there should be a Vcc/2 DC offset. However, what part of the circuit is producing it?
Voltage divider R6 and R7 or R9 and R10?
I would guess 9 & 10 based on the schematic https://cdn.sparkfun.com/datasheets/Bre … iniGen.pdf - can you probe it to see?