Fast charging of NiCd and NiMH batteries

Pin-compatible ICs Type MAX712 and MAX 713 from Maxim are intended for fast charging of nickel-metal-hydride (NiMH) batteries: the MAX713 may also be used in nickel-cadmium (NiCd) battery chargers (see Table 1). In this table, C is the nominal capacity of the battery in Ah. Note that charging at currents >2 C should be undertaken[…]

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Automatic battery charger 1

The charger described switches off the charging voltage when the battery reaches its full nominal voltage and switches it on again when the battery voltage drops below a predetermined level. Part of the battery voltage is taken from across potential divider Ri-R2-R3-R4 and compared with a reference voltage in IC2b. As long as the battery[…]

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Battery charger

The battery charger shown in the diagram may be used to charge a battery, or batteries with a total nominal voltage of 12 V (that is, ten NiCd batteries or six 2-V lead-acid batteries. It is small enough to be built into a mains adapter case. Misuse is virtually impossible: batteries connected with incorrect polarity;[…]

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Voltage Inverter

Voltage Inverter

A negative supply voltage may be obtained with the use of a special inverter IC. but such ICs are not always readily available. Fortunately. if the current drawn is not excessive, a standard HC-MOS chip may be used. The present circuit is based on Type 74HC14, which contains six Schmitt triggers, whose combined gates can[…]

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Automatic Battery Charger Circuit Diagram | Circuit Diagramz

Keeping your car battery constantly charged when the car is not in use appreciably increases the life of the battery. Charging is, of course, normally possible in your garage. The charger described here provides a constant charging current that may, for example, be fed to the battery via the cigarette lighter. Automatic battery charger circuit[…]

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