Plus/minus supply using LMC7660

LM 7660 is a CMOS voltage convertor capable of converting a positive voltage in the range of +1.5 v – 10 v to the corresponding negative voltage of -1.5v to -10v using very few external components. Below is the schematic diagram for the same.

We can use this get +/-5v from different sources like from 9v battery. Adding LM7805 converter to a 9v battery or 9v power supply will reduce it to 5v as shown below.

Components

  • IC1 – LMC7660
  • IC2 – LM7805
  • C1,C2 – 10μF 16V
  • C3 – 470 μF 25V
  • C4 – 2.2μF 16V
  • Battery – 9v

 

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