I am new to electronics and have been exploring easy to make DIY things for a while now.
I am using the following circuit to make a voltage regulated high current DC power supply.
The problem is, I can't adjust the potentiometers to get an output voltage beyond 11-12 volt. The DC output is always between 11 - 12 volts, neither less, nor more. By the way, the transformer is 12-0-12 5 amp, and I am measuring no-load voltage with a digital voltmeter.
My questions are:
- Is the circuit correct, regulated voltage at the base of 2N3055 will regulate the voltage at its emitter - is this principle true?
- Is keeping one of the terminals of the potentiometers open (not connected) a good idea? Should they serve the purpose in this circuit?
- If I want to troubleshoot, what are the test points and what are the expected voltage or other attributes I should look for?