Required materials: heating resistor (metal, silver paste, carbon paste, carbon fiber, etc.), protective tape (high temperature tape). The production circuit is, USB power supply a heating pad connected to a wire. Then the other line of the heating pad to connect the temperature control switch a line, the remaining temperature control switch line to connect the usb another power line. Because it is heated, all connections must be firmly connected, can not be soldered. Wire must be set of high temperature resistant protective sleeve.
Expanded Information:
The advantages of the USB heating pad:
1, USB heating pad advantages: the surface safety is not electrically charged, good insulation, no open flame, the use of safe.
2, rapid warming, high thermal efficiency, uniform heating, up to a temperature of 40 ℃ ~ 50 ℃. The temperature can be easily controlled by controlling the resistance.
3, power density can be adjusted according to customer requirements.
4, simple structure, long life.
5, diversified specifications, can be designed and produced according to customer requirements of a variety of different shapes, thickness and so on.
6, the heating body and air insulation, components resistant to acid and alkali and other corrosive substances.
7, environmental protection: does not contain lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers and other hazardous substances, in full compliance with the European Union environmental requirements.