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  • Phase detector

    <cut> Phase detector is the circuit that use to compare the phase of input signal.In the buttom circuit the LED will turn off when the phase of input signal is same. </cut> VN:F [1.6.9_936]please wait…Rating: 8.0/10 (2 votes cast)VN:F [1.6.9_936]Rating: +1 (from 1 vote)

  • Voltage Doubler

    <cut>Voltage Doubler This is a simple voltage doubler circuit which has the output voltage is 2xVin</cut> VN:F [1.6.9_936]please wait…Rating: 6.0/10 (2 votes cast)VN:F [1.6.9_936]Rating: -1 (from 1 vote)

  • Automatic Fan Control circuit

    This circuit is ON / OFF 12V DC fan or die CPU fan factory IF temperature above normal again temperature.You Can Feed the temperature of VR1. This circuit uses an NTC (Negative Temperature Coefficient) die, a thermistor is one in which die-zero energy is resistance with increasing temperature. Even die IF temperature increate voltage at […]

  • Standalone Linear NiMH / NiCd Fast Battery Charger

    This is a simple battery charger for NiMH / NiCd.It Requires No microcontroller or any Firmware.Linear Technology Corporation presents the LTC4060, an autonomous 1 – to 4-cell, 0.4A to 2A linear NiMH and NiCd Battery charger. The LTC4060 contains all functions required for a battery charger circuit that without the help of a microcontroller or […]

  • Auto Burglar Alarm

    This alarm circuit is based on two 555 timers. The alarm will sound your car horn if anyone opens the car door while the circuit is armed. The timers will allow you to leave the car without sounding the horn. To turn the circuit on S1 must be closed. VN:F [1.6.9_936]please wait…Rating: 0.0/10 (0 votes […]

  • HiJack Alarm

    Description: This circuit is designed primarily for the situation where a hijacker forces the driver from the vehicle. If a door is opened while the ignition is switched on, the circuit will trip. After a few minutes delay – when the thief is at a safe distance – the alarm will sound and the engine […]

  • Car Alarm and Immobilizer

    Description: This circuit features exit and entry delays, an instant alarm zone, an intermittent siren output and automatic reset. By adding external relays you can immobilize the vehicle and flash the lights. VN:F [1.6.9_936]please wait…Rating: 0.0/10 (0 votes cast)VN:F [1.6.9_936]Rating: 0 (from 0 votes)

  • Motorcycle Alarm Number 5 & 6

    Description: These are two – easy to build – relay-based alarms. You can use them to protect your motorcycle – but they have many more applications. If you use relays with 6-volt coils – they’ll protect your “Classic Bike”. VN:F [1.6.9_936]please wait…Rating: 0.0/10 (0 votes cast)VN:F [1.6.9_936]Rating: 0 (from 0 votes)

  • Motorcycle Alarm Number 4

    Description: This is a simple – easy to build – transistor based motorcycle alarm. It’s designed to work at 12-volts. But – if you change the relay for one with a 6-volt coil – it’ll protect your “Classic Bike”. The standby current is virtually zero – so it won’t drain your battery. VN:F [1.6.9_936]please wait…Rating: […]

  • Motorcycle Alarm Number 3

    Description: This circuit features an intermittent siren output and automatic reset. It can be operated manually using a key-switch or a hidden switch; but it can also be wired to set itself automatically when you turn-off the ignition. By adding external relays you can immobilize the bike, flash the lights etc. VN:F [1.6.9_936]please wait…Rating: 0.0/10 […]