Battery-capacity-tester


Posted on Sep 10, 2012

The test circuit gives an indication of the capacity remaining in a battery. By noting the time in seconds that the LED remains on after you depress the test switch Sl. The circuit has proven reliable in testing NiCad-, carbon-, and alkaline-type batteries. Closing Sl activates the circuit by applying voltage from the battery under test.


Battery-capacity-tester
Click here to download the full size of the above Circuit.

Voltage V, jumps to a value V0 ~ VRR3 /(R2 + R3 ) when the switch closes and then increases with a time constant T ~ C1 (R2 + R3). The divider R4/R5 fixes V2. The reference circuit IC1 sets VR to approximately 2.5 V. The op amp"s output remains high (LED on) until V, rises to the level of V,, when the LED turns off.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

3-30 V/2.5 A Stabilized variable power supply
FM PLL transmitter
Squib-firing circuit
Function-generator
Factory Alarm
Communication between a USB/serial device and an AVR (atmega/Arduino) microcontroller
Hearing Aids Circuit
VCO circuit
UPDATED ST-5 MAINLINE DEMODULATOR
Constant current charging circuit long delay
MP1826 by the LM567 and precision timer circuit
DTL integrated circuit by a crystal oscillator a



Top