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High power LED
Here is a High power White LED lamp that gives ample light in a room. It is an energy saving lamp and consumes very little power to give sufficient light. The lamp is directly powered from AC hence it...
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Solar Powered LED
Here is the simple solution to make an automatic solar powered lamp. It automatically switches on two high power White LEDs in the evening and stays on for 6 hours using a 6 volt 4.5 Ah rechargeable...
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Power Factor Correction
Power factor correction is the method to reduce the lagging power factor in inductive loads by fixing a high value capacitor across the phase and neutral close to the load. When the Voltage and Current...
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Telephone Lamp
Here is a White LED Lamp that turns on when the telephone rings. The cool white light helps to locate the phone in darkness and also helps to note the message or telephone number. The lamp remains on...
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Telephone Status Indicator
This simple circuit tells you about status of phone such as Line OK, Dialing and Call attended. It also has a lock facility to block outgoing calls keeping the incoming calls as usual. This prevents...
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Traffic Alert
This Solar based LED flasher can Alert vehicles in heavy traffic areas or places where road work is going on. It is fully automatic and turns on in the evening. During day time it remains off and...
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Solar Charger Circuit
Here is a circuit to charge Lead Acid or NiCd batteries using solar energy. The circuit harvests solar energy to charge a 6 volt 4.5 Ah rechargeable battery for various applications. The charger has...
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Solar Inverter Battery Charger
Here is an Energy saving battery charger. It harvests solar energy to replenish 12 volt Inverter battery. It has auto cut off facility to stop charging when the battery attains full charge. The charger...
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Low cost Pilot Lamp
This is the simple way to connect an LED in the Mains to use it as a pilot lamp. It takes little current compared to a neon lamp. It can power low efficiency as well as high efficiency LEDs including …...
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Tricky Charger
Here is a crude but efficient charger for Lead Acid Battery. It uses a 12 volt car bulb as current regulator and charge status indicator. The brightness of the bulb indicates how much charge is flowing...
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