Precision battery voltage monitor
The precision voltage-monitor chip contains a temperature-compensated voltage reference. R1 divides down the battery voltage to match the built-in reference vol...
Battery charge-discharge indicator
This circuit monitors car battery voltage. It provides an indication of nominal supply voltage as well as low or high voltage. RV1 and RV2 adjust the point at w...
Ni-cad discharge limiter
The circuit disconnects the battery from the load when output voltage falls below a preset level. Cl charges through R1 and turns on Q2. Collector current flows...
Battery charging regulator
The circuit is capable of charging a 12 volt component selection. When the battery voltage battery at up to a six ampere rate...
Simple ni-cad battery zapper
This circuit is used to clear internal shorts in nickel cadmium batteries...
Ni-cad charger
This circuit uses constant current LEDs to adjust charging current. It makes use of LEDs that pass a constant current of about 15 mA for an applied voltage rang...
Automotive charger for ni-cad battery packs
The number of silicon diodes across the output is determined by the voltage of the battery pack. Figure each diode at 0 volt...
Ni-cad charger with current and voltage limiting
Lamp LI will glow brightly and the LED will be out when the battery is low and being charged, but the LED will be bright and the light bulb dim when the battery...
200Ma-12v ni-cad battery charger
This circuit charges the battery at 75 mA battery can be left in the charger indefinitely, until the battery is charged, then it reduces the To set the shut-off...
Automatic shutoff battery charger
Adjust by setting the 500 ohm resistor while attached...
Battery charger
A diac is used in the gate circuit to provide work for the signal being applied to the gate. R1 a threshold level for firing the triac. C3 and R4 is selected to...
Simple ni-cad battery charger
This circuit provides an adjustable output voltage up to 35 Vdc and maximum output current of 50 mA...
12 V battery charger
This circuit is a high performance charger for gelled electrolyte lead-acid batteries. Charger quickly recharges battery and shuts off at full charge. Initially...
Battery-powered fence charger
In essence, the circuit is nothing more than an auto ignition coil and a set of points which accomplishes the same thing. A pulsing circuit made from a single C...
Voltage monitor circuit
This circuit gives an early warning of the discharge of batteries. Zener diode Dl is chosen for the voltage below which an indication is required (9 V). Should ...
Lithium battery indicator
State-of-Charge indication of-a sloping-voltage discharge can be used as a state-of-charge indicator. A typical voltage comparator circuit that gives a visual i...
Low battery indicator
Under good battery conditions the LED is off. As the battery voltage falls, the LED begins to flash until, in the low battery condition, the LED lights continuo...
Battery indicator
Continually monitors battery voltage during use and consumes only about 250 ? A (until the end point is reached). Near the end point Trl turns off, allowing Tr2...
Voltage detector relay
While the battery is being charged, its voltage is measured at V. If the measured voltage is lower than the minimum the relay will be energized, that wiU connec...
Heavy duty battery charger
Operation amplifier A1 directly drives the VN64GA with the error signal to control the output voltage. Peak rectifier Dl, CI supplies error amplifier A1 and the...