SOLAR LIGHT: Solar Lamp Circuit

Simplest automatic solar led light circuit. As an alkaline battery is charged in a completely different circuit than one used for nicd or nimh batteries what is more likely happening is that your garden lights are simply running off the battery without the solar cell being involved other than to shut off the light in the daytime.

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Here is a green energy project for school students on how to make solar lamps for your home.

Solar lamp circuit. The battery is connected to the input line through the no and common contacts of the relay. Solar energy has now become a popular alternative for the production of electricity. The main component of this simple solar lamp circuit is a small solar panel and a battery using rechargeable cells.

Relay also drops some voltage so that around 8 volts will be available for charging the battery. At the same time the solar current will charge to the batteries b1. Since the solar cell acts as a light sensor.

Solar powered led lamp circuit. When sunlight falls on the solar cell during daytime the solar cell charges the rechargeable battery and turns led1 off when no light falls on the solar cell during nighttime the ic draws power from the battery and provides constant current to light up led1. Diodes d1 and d2 drops 14 volts and charge indicator led uses 18 volts.

During the day the solar cell has voltage to d1 diode to bias transistor q1 it conducting collector and emitter closed so it not has the current bias to base of q2. A solar garden light circuit while the last circuit works well for driving a yellow or red led it runs at 24 v the output of the nimh battery it does not have sufficient voltage to drive a blue or white output led. It is off so led will go out.

Solar light ics are very handy they have the dark detection circuit and the voltage multiplying led driver built into one small four pin component. Solar pathway light circuit with constant voltage if a li ion battery is intended to be used for the above explained circuit a constant voltage feature becomes crucial for safeguarding battery life and prolonging it. Using the solar light ic all you need is the solar ic an inductor and the ultra bright led to make the circuit.