Regulated dual power supply circuit from single battery source


Posted on Feb 4, 2014

How to create dual power supply unit using single battery for your lab prupose Dual voltage power supplies are required particularly for op amp experiments and some of the instrumentation amplifiers. Some low power audio pre amplifiers also uses dual voltage supply. Here is a simple dual power supply schematic capable of producing +9V, 0V and -9V


Regulated dual power supply circuit from single battery source
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(dual polarity and ground potential) from a single 9V battery. You can create your own dual power supplies with different ranges of +Vcc and Vcc such as +5V, 0V and -5V or +12V, 0V and -12V. This article gives the working and constructional details of the circuit schematic using single battery source. Timer IC NE555 is configured as a free running astable multivibrator oscillator. It provides approximately 100 kHz frequency. We have already discussed about astable multivibrator. The frequency of the astable multivibrator depends on the values of capacitor and resistorsassociatedwith 555 timer circuit. Our astable frequency calculator will help you decide them. The operating voltage of 555 timer IC isapproximatelybetween 3V to 16V, so by changing the battery supply you can implement required dual power supply varies from 3V to 16V other than +9V, 0V and -9V supply.




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