Solar Panel Circuit Board

For night time switching you may have to use a delay on timer with the circuit.

Solar panel circuit board.

Two 1n4007 is fine considering the ease of making and the solar panel being 9 v or 12 v plenty of voltage available for the 2 v drop. It offers the advantages of low power dissipation low minimum operating voltage and automatic dusk to dawn switching. Ic cl0116 lamp controller is an application specific integrated circuit asic in which solar charging and led driving sections are integrated on the chip. Between the two is a reverse blocking diode.

1 x 3 7 volt battery at least 4 5 volt solar cell in. So batteries and the circuit dictate the solar cell size there are some of these lights with pr sensors that use a 3 7 volt battery and a solar cell of 4 5 volts. In this circuit the solar panel charges up a 3 cell nimh battery 3 6 v. The lights won t turn on until the solar panel voltage became 1 v or lower that will happen at extreme dusk but not at night.

2 x 1 2 volt batteries at least 3 volt solar cell in full sun. 1 x 1 2 volt battery at least 1 5 volt solar cell in full sun.