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Category : " Other meter circuits "

BatCap: A Battery Capacity meter

Catagory : Other meter circuits
The principle of the meter is very simple:You hookup a fully charged battery and load resistor to the meter, enter the value of the resistor and the cutoff voltage and start a discharge cycle. The meter will switch on the load using a power mosfet and continiously measure the battery voltage. To precisily measure the voltage a reference diode is used. During the discharge you can select to display the current voltage and current or the time expired and capacity so-far. If the cutoff voltage is reached the load will be disconnected and the capacity will be shown on the LCD display. [...]

A Battery capacity meter

Catagory : Other meter circuits
With this mAh meter you can check the mAh capacitance of your NiCad or NiMH rechargeable batteries.when you insert a freshly charged battery, the LED will start blinking and the counter will start counting. After some time (1-3 hours) the battery is discharged and the counter will stop. The readout of the counter indicates the capacitance of the battery in mAh. [...]

Electro meter circuit

Catagory : Other meter circuits
This is a simple electro meter circuit.This circuit will detect electrostatic charge from the any material such plastic,comb etc.It can measure up to 30 cm from the target material. [...]