Solar Panel Led Light Circuit

In our 4rth automatic solar light circuit we incorporate a single relay as a switch for charging a battery during day time or as long as the solar panel is generating electricity and for illuminating a connected led while the panel is not active.

Solar panel led light circuit.

Upgrading to a relay changeover. Bill of materials to get a 6v 4ah solar light circuit employing a 1 watt led. Solar panel 12v 800ma. Solar panel specifications a small portable solar panel specified for the present circuit is quite economical and will serve to provide a long life converting light into pure electricity.

The circuit design is extremely straightforward and may be understood with the following points. Solar cells are tiny electrical devices that convert energy from a light source such as the sun into electricity. Between the two is a reverse blocking diode. At the same time the solar current will charge to the batteries b1.

If you decide you can skip this step and control the leds via the switch. 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. Circuit diagram of solar garden light. The system automatically switches on the lamps at dusk and switches them off at dawn.

As can be seen in the given circuit diagram the design basically consists of a solar panel a pnp transistor few leds a battery and a few resistors. Simplest automatic solar led light circuit 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. Add the battery and the solar cell and you have a solar light. The transistor is the only active component which is positioned as a switch for preventing the battery voltage from reaching the connected leds.

A solar panel solar panels are made up of solar cells also called photovoltaic cells. Solar cells are made up of silicon which is a type of semiconductormaterial a material that can act as either an insulator or as a conductor. After the first transistor we get the famous joule thief circuit. It is off so led will go out.

In this circuit the solar panel charges up a 3 cell nimh battery 3 6 v. The above mentioned changeover quickly changes the battery across charging mode to the led mode lighting the led from the battery voltage. When power sunlight is hitting the solar panel the transistor is off. When there is power darkness coming from the solar panel the pathway turns on and we get power.

In this next circuit we use the solar panel to charge up a nimh rechargeable battery and also led off of the power which will stay on when it gets dark out. Rx 10 ohm 2 watt.