Simple circuit for improving current detection accuracy of controller

The utility model provides a simple circuit for improving the current detection accuracy of a controller, and the circuit comprises a power supply unit which is connected with the positive electrode of a load and converts the voltage transmitted by the load; the controller is provided with an ADC (Analog to Digital Converter) detection end, and a power supply end takes power from the output end of the power supply unit; the resistor R3 is bridged between the negative electrode of the load and the ground; the circuit further comprises a resistor R1 and a resistor R2, the output end of the power supply unit is sequentially connected with the resistor R1 and the resistor R2 in series to the negative electrode of the load, the resistance value of the resistor R1 is larger than that of the resistor R2, and the ADC detection end of the controller is connected to a contact between the resistor R1 and the resistor R2. According to the utility model, the current detection accuracy of the controller can be improved wit