Battery voltage monitor

Philips’ IC Type TEA 104 1T is ideal for monitoring the voltage of 1.8_4.0 V batteries. Internal trigger and timing logic prevent a circuit from reacting to brief breaks in the supply voltage caused by pulses on the load current. 6ne or two LEDs may be used to indicate when the voltage drops below a[…]

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battery tester

Battery Tester Circuit Diagram

Various types of dry and rechargeable battery (with an e.m.f. of ≤2.7) can be tested with the circuit shown in the diagram below. It is based on the well-known Type LM 3914 LED display driver from National Semiconductors. The battery tester circuit compares the e.m.f. of the battery with a reference voltage that is derived[…]

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