Ok I connected some jumpers and got their ohms to be 1Ω. The issue Im dealing with is that because I had a split power supply set up and Im connecting the opamp's GND to vcc- on the split supply, I have some things connected to ground and others connected to vcc-.Connected to Ground (midway between vcc- and vcc+):mic speaker10uF cap on the way to v+ opampopamp negative feedback loopConnected to Vcc- from split supplyGND opamp100uF (Vo) thru 10k R2n3906 collectorChrisTenone, I read your reply #87 but i want to make sure I understand it right before firing this up. According to what I have, GND on opamp would be connected to -9V as well as the 100uF (Vo) thru 10k R and the 2n3906. Should I move these to real ground which will actually be 0V because it is in the middle of the 2 9V batteries?Thanks
Right, but at this moment I still have the 2 batteries making up a split supply +9V and -9V. Thats what I mean by "I have connected to GND and some connected to Vcc-).Im thinking I should move the:GND opamp100uF (Vo) thru 10k R2n3906 collectorto real GND from the supply, 0V.
...And, if we're working with arduino...... we also usually connect that wire (0V) to the GND pin of the arduino as well.
Totally correct. But it needs a caution!!!Do not hook up the + or - voltages to an Arduino. Both +9 volts, or -anything can fry things in the Arduino world.
Basically break the connection from the opamp-Vcc- to -9V, and reconnect it to GND then, but leave everything else connected to -9V?