We already know that the circuits using opamp will only work on dual power supply. What is actually a dual power supply? For example, usual 12V Dc means that it contains supply wires of 0 and 12V. But in the case of a dual supply, it contains 3 wires 0,-12,+12. When we check the potential difference between the +12 and -12 wires using a multimeter, it may display you about 24V dc. In normal cases, a dual power supply system consist of a center tap transformer, positive voltage regulator and a negative regulator etc. But here this circuit avoids such things from the system and uses a single LM380 IC. We get dual supply at the output whenever we give a DC voltage to it.
Circuit Diagram of Voltage inverter Using LM380: Click to enlarge
Working
The heart, all in all in this circuit is a LM380 audio amplifier IC. You need to connect 14,3,7 input pins to supply, and we get the 0V from the pin 8 of the IC. We can use RV1 potentiometer for adjusting and balancing the voltage output. So the circuit may used to convert a single supply into dual power supply.
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1 comments:
How much power it can survive
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