Loli one-way brushed ESC modified version

        This circuit actually adds a pre-driver to the MOS tube. Since the Loli ESC uses the I/O port of the MCU to directly drive the MOS tube, the conduction voltage of the MOS tube is required to be lower than 5V, otherwise the working efficiency will be relatively low. Low. I bought 20 STP75NF75 during my last online shopping. The conduction voltage of this tube is 10v and the internal resistance is 11mΩ. It is larger than the internal resistance of the IRF3205 I bought before. It uses the original ESC circuit to drive a 180 motor with a 4-inch propeller and 2s full oil. The tube cannot be touched in less than 1 minute. After the improvement, the temperature of the MOS tube in full oil for 3 minutes is about 40 degrees, and it can be touched by hand. I don’t have the tools to test the current and temperature, so I can only give a rough estimate. The following is Circuit diagram, the motor uses Wanzhida FK-180-3736-45 motor, 7.2v no-load speed 38500, the motor coil has turned black after running with full oil for 2 seconds for about 4 minutes, and the 4-inch propeller shaft of the toy has been burned. The motor cannot be touched anymore, and the ESC is about 40 degrees when touched by hand. If the heat is dissipated well during flight, the temperature will be lower, and the effect is very obvious.        In order to reduce weight, only one triode is used as the driver, so the output of the MCU needs to be reversed. The PWM output in the firmware needs to be modified. Any 0 is changed to 1 and any 1 is changed to 0. The firmware is burned according to the Loli one-way brush. The ESC programming method is carried out. The option "P3.3 pin is low level after power-on reset" is not selected. After the ESC is powered on, the motor will rotate lightly for one or two turns. There is no danger. The circuit welding must be checked and there must be no If the MCU output port is soldered to the transistor part, the motor will spin wildly at the maximum throttle. Do not turn on the paddles during the test.