Simple Solar Panel Circuit

The diode isolates the batteries from the solar cell so that when the sun is not out the solar cell will not drain the batteries.

Simple solar panel circuit.

The above mentioned changeover quickly changes the battery across charging mode to the led mode lighting the led from the battery voltage. You just created a basic solar powered led circuit. Bill of materials to get a 6v 4ah solar light circuit employing a 1 watt led. Now replace the battery with the solar panel with the positive lead of the solar panel connected to the positive lead wire from screw 5 and the negative lead of the solar panel connected to the negative lead wire from screw 3.

The first part of a solar circuit is a device for collecting sunlight. Test your solar circuit. To keep things simple we re using a single nicely made small solar panel for all of these circuits. I am building a model of a solar panel house for middle school students.

The panel that we re using for these circuits is this one part number pwr1241 from bg micro about 3 each. Pat yourself on your. Rx 10 ohm 2 watt. R1 r2 100 ohms 5 watts r3 r4 15 ohms 5 watts t1 t2 2n3055 mounted on suitable heatsink transformer 9 0 9v 3 to 10 amps r5 10k r6 0 1 ohms 1 watt p1 100k preset linear d1 d2 6a4 d3 1n4148 t3 bc547 c1 100uf 25v relay 9v spdt ldr any standard type solar panel 17.

Since the output of the panels varies from about 10 18volts i d like to regulate it at about 12 13vdc.