Set Up Dual Line Bench Power Supply For Op Amp Testing

AI Thread Summary
To set up a dual line bench power supply for op-amp testing using a 30V supply, connect the positive output to +15V and create a virtual ground using the op-amp's output. The negative output can be utilized as -15V, effectively referencing the circuit between +15V and -15V. This method allows for proper op-amp operation without needing a dual rail power supply. By applying +30V DC power, the op-amp output serves as the virtual ground for the circuit. This approach simplifies the setup while ensuring the op-amp functions correctly.
MathsDude69
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This is a very silly question. I can't believe I have forgotten. I have a 30v bench power supply and I am looking to test an op-amp running at +/- 15v. I have a supply which has a negative output/ positive output and inbetween a green common/earth output. How do I wire them to produce the +/- 15v rather than just the full 30v?
 
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From your description, you just have single rail +30V power supply. But there is a simple way to power op-amps from a single rail by generating a virtual ground. Consider the circuit:

VirtualGround.gif


Apply +30V Vcc DC power, and the output of the op-amp will serve as a virtual ground to be used for the rest of your circuit which is now going to be referenced between +15/-15 volts.
 
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