High Current Inductive Charge Kit - 5V @ 1.3A max

Inductive charging lets you power a device without direct wire connection. You've probably seen it in rechargeable electric toothbrushes, where you just place the toothbrush in the holder to recharge. These chargers split a power transformer into two halves. An AC waveform is generated in one half and couples into the second coil. This basic charger set provides a 5V DC output when the input half is powered with 9V - 12V DC. You can draw up to ~1000mA when the coils are 2 - 3 mm apart. As the distance between the coils increases, the efficiency drops. For a 500mA use, the coils can be 10mm apart. Non-ferrous and non-conductive materials like air, wood, leather, plastic, paper, or glass can be placed between the coils without affecting the distance or efficiency. The coils should be fairly co-axial for best power transfer, similar to how an electric toothbrush fits into the holder to align the coils. Since it's an air-core transformer, it's not very efficient, with only about 40% of the energy reaching the other end. But it's suitable for low-power or charging projects. If you draw 5V 100mA (0.5W) on the output side, you'll need about 150mA from the input end. The quiescent current is about 70mA all the time, even when the other coil is far away. These are basic modules, likely for low-cost toys. There are no datasheets or specifications. The rectangle board with two chips is the transmitter (powered by 9V), and the board with the large square inductor is the output that you can connect to the power - needed part of your project.

Using this inductive charging kit is easy. First, power the transmitter (the rectangle board with two chips) with 9V DC. Then, place the output board (the one with the large square inductor) near the transmitter. Make sure the two coils are as parallel as possible and the circles line up for the best power transfer. You can put non - ferrous and non - conductive materials like wood or plastic between the coils. When using, remember that the closer the two coils are, the more current you can draw. If you need more power, try to keep the distance between the coils within 2 - 3 mm. If you need less power, like 500mA, the coils can be up to 10mm apart. Keep in mind that this charger is not very efficient. You'll need to supply more current from the input end than you get on the output end. Also, the charger has a quiescent current of about 70mA all the time, so it consumes a bit of power even when not actively charging. As for maintenance, keep the boards clean and dry. Avoid dropping or subjecting them to strong impacts, as this could damage the coils or the chips. Since there are no datasheets, if you have any problems, it might be a bit tricky to troubleshoot, but basic checks like ensuring proper power supply and coil alignment can help.