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Found 1 result

  1. My son is doing an NPN transistor type diff gain circuit/CMRR breadboard for his class. He's using the +3V and -3V supplies and the AWG from the openscope MZ board. Seems to me he needs to ground the scope 1- and 2- leads to the black GND, otherwise floating, hence wacky results. He has in fact been floating these "-" leads and indeed got some weird results. Since he is using positive and negative supplies, the breadboard has no GND connection explicitly. So the path to ground is maybe thru the supplies, or some weird high impedance AC path thru the scope "+" leads. Should