Solar Light With Batteries : 7 Steps

Demonstrates the use of solar energy to light up the garden at night
Converts solar energy to DC power during daytime and stores it in rechargeable batteries
Photodiode controls brightness of LED's depending on available external lightComplexity Level - Jr.

Kit components,

Solar Panel 4V DC,
60 mAPhoto-transistorPrinted Circuit Board,
Rechargeable 9V Battery
All Other Required ComponentsPictorial Step-by-Step GuideInteractive Classroom Circuit
TheoryInstructional Videos with Testing and Troubleshooting Guide

For the component kits click the URL below ,

" http://www.adormi.com/solar-light?filter_name=light "

Step 1: Identifying Sides

The side of the board that has been printed with

component markings is the component side, this means the components are mounted by inserting them down from the printed side; then they are soldered on the opposite, unprinted side. Please identify the PCB soldering side and component side as given below in the Figure 3: Component and Solder side of PCB.

Step 2: Resistor Mounting

Begin with mounting all resistors R1-R9 in the

respective slots of the PCB on the component side as shown below in Figure 4: Resistors mounted on PCB. Please read resistors carefully for rating also described in Electronic Fundaments section before placing them in the slots marked in the PCB with their rating

Step 3: LED Mounting

Mount the LEDs in LED5M slots of the PCB.

LEDs must be mounted so that the long lead which is the anode is inserted into the base of the triangle symbol; the smaller lead is inserted in the cathode displayed as a vertical line on the tip of the triangle. As shown in the Figure 6: LEDs mounted on PCB, A stands for Anode and K stands for cathode

Step 4: Transistor Mounting

Transistors are polarized and then installed so

that their flat edge is above the flat edge of the placement marking. Transistors are very heat sensitive.Put your finger on the top to gauge heat while soldering and wait a while after soldering each lead to let the device cool down. Mount transistors in the respective slots of the PCB. Refer to Figure 7: Transistors mounted on PCB.

Step 5: Capacitor Mounting

The basic function of a capacitor is to store electric

charge. There are many kinds of capacitors depending on their requirements. Capacitor contains two terminals, the longer terminal is positive while the shorter one is negative. Inside the capacitor, the terminals connect to two metal plates separated by a non-conducting substance, or dielectric. Please install the capacitors and then solder them with care as shown in the Figure 8: Capacitors mounted on PCB