A very simple adjustable power supply can be built on a single piece of chocolate block based on the L200CV IC. The output is variable between 0 and 30V, with an adjustable current limit up to 2 amps. This very simple, low component count project aims to provide a low current, adjustable power supply that [...]
Circuit :Volker Jeschkeit Description: A Universal Power supply based on the L200 regulator, which includes an outboard pass transistor to boost output currents up to 4 amps. Related Links More circuit about Variable Regulator More circuit by IC L200 top LM317 regulator L200 Variable Power Supply 3 to 15 volts 2Amp Current Limiting Bench Power [...]
The output voltage rises slowly and reaches 15 V in 5 seconds. In order to perform this soft-start function, the LM317 voltage regulator IC requires an external universal PNP transistor and the L200 uses its internal comparator (pin 2). After switch-on, the rising voltage on the positive side of the charging electrolytic capacitor slowly turns [...]
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