Pepper drying control circuit with overvoltage and undervoltage protection

The utility model relates to a pepper drying control circuit with overvoltage and undervoltage protection, which comprises a circuit board, an MCU and a power supply module, the MCU and the power supply module are arranged on the circuit board, the power supply module comprises a power supply circuit I and a power supply circuit II, the output end of the power supply circuit I is electrically connected with the power supply circuit II, the power supply circuit II is electrically connected with the MCU, and the MCU is electrically connected with the MCU. Wherein the MCU comprises a CPU, AD detection circuits, a temperature sensor, a current detection module circuit and a voltage detection module circuit, the number of the AD detection circuits is multiple, and the output ends of the AD detection circuits are electrically connected with the CPU; the MCU and the AD detection circuit are arranged in a matched mode, the MCU, the voltage detection module circuit and the current detection module circuit jointly dete