Solar path lights – Solar lights add atmosphere and provide a safer road at night. Making lights even allows you to create exactly the mood you want, either whimsical or mystical, and makes an engaging conversation starter.
Trim the PCB to a 2-inch by 2-inch square with a hacksaw. Make all soldered connections by putting electronics on the front and soldering them on the back of this forum, using soldering iron and solder of solar path lights. Solder the positive (+) terminal of the solar cell to one end of a 2.2K ohm resister (R1) and unbanded anode end of the power diode, using a soldering iron. Solder the free end of the 2.2K ohm resistor (R1) to the base end of MPS2222A NPN transister (Q1) and to one end of the10k-ohm resistor (R2).
Solder the free end of the 10k-ohm resister (R2) to a short piece of black wire leading to the negative (-) terminal on the solar panel, the emitters of both MPS2222A NPN transistors (Q1 and Q2), and a short piece of black wire will lead to the negative (-) terminals of the battery pack. Attach the wires to the solar path lights panel and battery pack, use the electrical coupling caps. Solder collector end Q1 MPS2222A NPN transistor to the base end of Q2 MPS2222A NPN transistor and to one end of the second 10K ohm resistor (R3). Solder the free end of the second 10K ohm resistor (R3) to the cathode (fixed) end of 1N4001 power diode (D1); for two short, red wires to be attached to the anode ends of both LED; and a short piece of red wire leading to the positive (+) terminals of the battery pack. Connect the wires to the battery and the LEDs, using electrical coupling caps.