YouTube has many videos about restoring solar garden lights. Extending the battery life of solar garden lamps, making them run longer at night, and countless other hackers. This is a little different from what you found in the bathtub. From bright white to chip RGB or strobe LED, this is to turn on circular garden lights. Now, it\'s not about solar garden lights. You just replace the bright white LED with a chip RGB LED, which works like the first circuit. With this circuit, you only need to replace the bright white LED with chip LED, RGB or stroboscopic lamp, and the circuit can work. Diode 1N4148 or 1N5817 LED chip RGB or stroboscopic capacitor 0. 1 UF to 10 UF screwdrivers to turn on the solar lamp side cutter spring nipple clamp soldering tin soldering iron if you want to build your own circuit, this is the simplest and easiest circuit to build. 4 V solar cell chip RGB LED 1N5817 diode 5. 6 k_resistor 100_resistor S8550 or any general purpose PNP transistor 3x 1. The working principle of the circuit is very simple. When the sun rises, a positive charge is applied to the base of the transistor that opens the PNP transistor. This will turn off the RGB LED and charge all current through the 1N5817 diode. When the sun goes down; Solar cells allow current to flow in another way, imposing negative charges on the base of PNP transistors. This will turn off the PNP transistor and allow current from the battery to flow through the RGB LED. The 1N5817 diode prevents the battery from positively charging the base of the PNP transistor. 5252F Joule Burglar is a simple device. It converts 1. The voltage from rechargeable batteries to LEDs is 2 volts. Using the characteristics of inductors, Joule thieves turn on and off the current, increase the voltage and reduce the current. You can see the switching current on the oscilloscope. If you just change the LED, it probably won\'t light up. The reason is that chip LEDs use 10 mA more current than white LEDs. Looking at the 5252F data sheet, you can see that 270uH sensors provide 14. 5 mA and chip LED need more than 20 mA. From the data sheet of 5252F, you find that you need to replace the inductor with 150uH inductor. Now, the chip LED lights up, but it does not cycle through red, green and blue. When you connect the oscilloscope to the LED, you can see nothing on the data sheet. Chip LED needs DC. Every time the power is turned on, the chip in the LED starts counting the color changes, so every signal from the Joule burglar starts counting, and it never enters the next color. To solve this problem, you need to add a buffer to the LED. The buffer circuit is just a Joule burglar and chip LED circuit added between the S diode and a capacitor. When the Joule Burglar signal turns to zero volt, the diode keeps the capacitor charged. Now when you connect the oscilloscope to the chip LED, the DC current fluctuates a little, and the chip LED circulates through different colors. Now, you have RGB or strobe garden teams to install them and put them outside in a place where they can get full sunshine.