meter

The LED Indicator for remote AC loads Circuit. At very cheap and use electronic part the a little. This circuit uses diode rectifier cheapness , Resistor and LED only. As a result assemble the circuit shows flowwing of AC current Source in load easily. Although intend to design for apply to office implement [...]

A friends at use the battery often meet a problem electric its energy is finished in important always may many good if there is the circuit warns before or there is the way checks at the beginning. By this circuit use the transistor just one and don’t have to have power supply [...]

This is Logic Digital Tester Circuit. It uses the level input about 5V and use the integrated circuit LM324. Be Main Part electronics perform Drive All LED. Then use Current very low about 10mA by have potentiometer be formed fine the value threshold give [...]