PowerSupply. - Here is Circuit Schematic Ni-MH Ni-Cd Adjustable Constant Current Charger. And this is a Adjustable Constant Current Ni-MH or Ni-Cd battery charger circuit. It can be used to get a constant current power supply. Here is the schematic diagram of the circuit:
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| Figure 1. Schematic Ni-MH Ni-Cd Adjustable Constant Current Charger using LM317 (Source: www.electronicecircuits.com) |
This circuit can be adjusted to any value from a few milliamp to about 500mA. The max current is 500mA because it is the limit of the BC140 transistor in the current-limiting part of the circuit.
Component List:
- R1 100Ω
- VR1 500Ω Preset
- C1 0.1µF
- C2 0.01µF
- D1 1N4001
- Q1 BC140
- IC1 LM317
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