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Lead-Acid Battery Charger With Voltage Analyser

Nowadays maintenance-free lead-acid batteries are common in vehicles, inverters, and UPS systems. If the battery is left in a poor state of ...

Parts: R1 6K8 1/4W Resistor R2 220K 1/4W Resistor R3 22K 1/4W Resistor C1 100µF 25V Electrolytic Capacitor C2 10µF 25V Electrolytic Capacito...

Parts List: U1 = LM339, Op-Amp Q1 = 2N3906, PNP transistor. D1,D2 = 1N4148, signal diode ZD1 = 1N5235, 6.8V zener diode R1 = 1K R2 = 10K, tr...

The brake lights of the automobile trigger this circuit on and off. This save the annoyance of the alarm when it is not needed. This is an o...

Description: A 12 Volt power suppiled designed for Ron's Modular Burglar Alarm. However, being a popular supply voltage this circuit wil...

Description: This circuit is designed primarily for the situation where a hijacker forces the driver from the vehicle. If a door is opened w...