Universal Battery Charger Using by LM317

A very straightforward universal charger electronic project ar reaching to be designed victimization the LM317 device and variety of entirely totally different electronic elements. As you'll be able to see during this schematic circuit this charger has extreme few parts , however is doing a really smart job . once power is applied to the circuit the SCR1 is off, therefore there's no bias-current path to ground.

Universal Battery Charger Circuit Diagram:

Universal Battery Charger Using by LM317

The LM317 is connected to the battery through diode D1, limiting resistor R1, and bias resistor R2. The D1 diode is used to prevent the battery from discharging through the LED and the SCR when power is removed from the circuit. When LED1 is on, the circuit is in the voltage-regulating mode and when LED1 is off, the circuit is in the current-regulating mode.

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