I have this circuit to vary the voltage from 6 to 22 volts. The problem is it does not work. I get voltages around 6 volts all the time.
**broken link removed**
I believe I need an OP Amplifier and have the circuit like this. Can some one suggest an OP Amp to use and is this going to work.
Ray.
**broken link removed**
**broken link removed**
I believe I need an OP Amplifier and have the circuit like this. Can some one suggest an OP Amp to use and is this going to work.
Ray.
**broken link removed**
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