Hand warmers, every winter, many people wear long trousers, especially female friends. Compared with male friends, their hands and feet will be colder, their complexion will be paler, and they are prone to colds and fever. Winter is the season to keep warm. The hand warmer is developed by a single-chip microcomputer. The temperature of the hand warmer can be transmitted from the palm to the whole body, so that your winter will no longer be cold. Moreover, these personalized hand warmers are very exquisite, compact, easy to carry, and have a high face value, directly hitting girls' hearts!
Hand warmer PCB structure description
1. Heat conduction surface: The surface that is easily caused by the principle of material priority can transmit heat well;
2. Large-capacity battery: make the warmth last longer and make the winter more comfortable;
3. Heating film: separate from the hand warmer, so as to prevent short circuit and explosion problems;
4. Single-chip microcomputer IC chip: the program instructions of the single-chip microcomputer are sent to the heating sheet to conduct heat transfer.