Archive for category: Battery and Charger Diagram

Receiver Battery Low Voltage Alarm Circuit

Battery and Charger Diagram | By: Diagram mania

Here is another equally cool low voltage alarm circuit for your glider receiver battery that I’ve shamelessly stolen from George Steiner’s book "A to Z–Radio Control Electronic Journal" (see below). I’ve modified it to use with small battery packs in R/C gliders. This design has a trigger voltage at about 4.3 volts, and it draws […]

Precision Receiver Battery Low Voltage Alarm Circuit

Battery and Charger Diagram | By: Diagram mania

Flying hand launch gliders means living with small capacity receiver NiCad battery packs. These small packs are light, but have the distinct disadvantage of rapidly depleting. You can carefully time your flights, but you end up either crashing when your plane seizes or using only a portion of the already small capacity of the battery. […]

Discharger for Receiver Battery Packs Circuit

Battery and Charger Diagram | By: Diagram mania

You may have read about cycling NiCad batteries. If not, read a little here ( Red’s R/C Battery Clinic) for an excellent overview. Overcharging apparently leads to voltage depression, which can be corrected by one or two complete discharges (to 1 to 1.1 volts per cell). On the other hand, over discharging the batteries to […]

Nicad Battery Charger Circuit

Battery and Charger Diagram | By: Diagram mania

WARNING: Take care with this circuit. Use a voltmeter to observe correct polarity. Nicads can explode if short circuited or connected with the wrong polarity. Circuit diagram Notes: This simple charger uses a single transistor as a constant current source. The voltage across the pair of 1N4148 diodes biases the base of the BD140 medium […]

Car Battery Charger Circuit

Battery and Charger Diagram | By: Diagram mania

This charger will quickly and easily charge most any lead acid battery. The charger delivers full current until the current drawn by the battery falls to 150 mA. At this time, a lower voltage is applied to finish off and keep from over charging. When the battery is fully charged, the circuit switches off and […]

12V Lead-Acid Battery Monitor circuit diagram

Battery and Charger Diagram | By: Diagram mania

This circuit is designed to monitor the level of power capacity at 12V Lead-Acid battery. Battery power level will be indicated by LEDs. This easy circuit makes it possible to monitor the charging process to a higher level. Final adjustsments are simple and easy and the only device required is a digital voltmeter for the […]

Circuits for use with batteries

Battery and Charger Diagram | By: Diagram mania

This is a page with a few circuits which may be useful for monitoring the state of your batteries.   Low battery indicator. The first simply circuit turns on an LED when the battery voltage gets too low.   For a transistor to conduct, it requires a voltage of about 0.6 between its base and […]

Solar charger for lead-acid batteries

Battery and Charger Diagram | By: Diagram mania

This circuit is still under development, but works well as shown. This circuit is intended for charging lead-acid batteries with a solar panel. The customary diode that prevents the battery from discharging through the solar panel has been replaced by a FET-comparator combination. The charger will stop charging once a pre-set voltage (temperature compensated) has […]

Batteries charger & PSU – ideal for digital cameras

Battery and Charger Diagram | By: Diagram mania

This circuit was created for digital cameras. It’s known the digital cameras have considerable power consumption. For example my camera Minolta E223 requires approximately 800 mA. In practice a mains power supply or high capacity NiMH accumulators (batteries) can satisfy this demand. This circuit consists of two parts, charger and adapter. The transformer, rectifier bridge […]

Economic Battery Sufficiency Tester by BC547

Battery and Charger Diagram | By: Diagram mania

Description Battery level indicators generally detect the voltage levels of the batteries to give a result. So, tester circuits must not be a heavy load during the measurement process. This tester circuit draws very low current. A short duration of LED bright will show you the battery has still enough voltage level to operate devices. […]