I have two PWM sources to control mosfet gate driver. the first source is MCU which isn't connected all the time (when needed)(it is not on the pcb), the second is timer 555 which is connected just when i push the buttons (right or left)(manual control and it is on the pcb). I isolated the two sources with pnp transistors to connect the timer 555 when i push the buttons assuming that the MCU isn't connected. the output of the transistors is connected to AND gate. then when i connect the MCU to drive the circuit according to the code without pushing the buttons , it will be isolated from 555 timer.
do you have comments on this circuit?
do you have comments on this circuit?
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