Solar Panel Battery Charger Circuit

The copper stripboard includes copper tracks rows.

Solar panel battery charger circuit.

Place the solar panel in sunlight. The circuit of a simple lm338 solar battery charger is shown below using the ic lm338. If a smaller or less effective heat sink is used the maximum power dissipation must be de rated. The circuit uses a 12 volt solar panel and a variable voltage regulator ic lm 317.

Each every track is electrically. The solar panel consists of solar cells each rated at 1 2 volts. Schematic of the solar charger circuit. For attaching the wire one can make use of the soldered or the un soldered.

Charging voltage is typically around 4 2v. Using a current control feature the specialty of the design is that it incorporates a current control feature also. Solar cells are connected to the input of the lithium battery charger tp4056 whose output is connected to the 18560 lithium battery. 12 volt dc is available from the panel to charge the battery.

Online shopping from a great selection at health household store. Charging current passes through d1 to the voltage regulator ic lm 317. Circuit diagram of solar panel battery charger step 1. Now set the output voltage by adjusting pot rv1 check the battery voltage using digital multi meter.

By adjusting its adjust pin output voltage and current can be regulated. The circuit diagram shows a simple set up using the ic lm 338 which has been configured in its standard regulated power supply mode. 12v solar battery charger controller circuit make download circuit diagram a. A 5v step up voltage booster is also connected to the battery and is used to convert from 3 7v dc to 5v dc.

In this solar battery charger project the power is limited by the thermal resistances of both the lm317t and the heat sink. Voltage booster s input ranges from 0 9 to 5 0v. To keep the junction temperature below the 125 c max the power must be limited to about 10w.