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

HI-FI Stereo Encoder / Multiplexer
Scope calibrator
Noisy-signals-filter
Electronic jam circuit diagram
Fully Adjustable Power Supply
40w no tune amp
Video Amplifier Circuit for Camera PCB
fade fade out led circuit car interior lighting
Two channel audio mixer circuit design electronic project
Electronic Transformer Coupled Oscillators
Level controller circuit
Using the same parameters more convenient level 36dB-oct low-pass filter design



Top