UNIVERSAL BATTERY CHARGER


Posted on Feb 5, 2014

When power is applied to the circuit, SCR1 is off, so there is no bias-current path to ground; thus, LM317 acts as a current regulator. The LM317 is connected to the battery through steering diode D1, limiting resistor R1, and bias resistor R2. The steering diode prevents the battery from discharging through the LED and the SCR when power is remov


UNIVERSAL BATTERY CHARGER
Click here to download the full size of the above Circuit.

ed from the circuit. As the battery charges, the voltage across trip-point potentiometer R5 rises, and at some point, turns on the SCR. Then, current from the regulator can flow to ground, so the regulator now functions in the voltage mode. When the SCR turns on, it also provides LED1 with a path to ground through R3. So, when LED1 is on, the circuit is in the voltage-regulating mode; when LED1 is off, the circuit is in the current-regulating mode.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Infrared Interruption counter
Wireless Data Communication system
Color organ
Nicad Battery Tester
51 surround amplifier circuit schematic
switching
two stage fm transmitter bug more tank circuits
Network RJ45 Cable Tester Circuit
Novel BuzzerCircuit
ISL6315 Two-Phase Multiphase Buck PWM Controller with MOSFET Drivers Integrated (No Droop)
SIMPLE CONTINUITY TESTER CIRCUIT
R/C Timer-Switch for Radio Control Applications
Infrared remote control receiver for Media Centers
RC Servo Processor



Top