Accidentally step on the car throttle controller

When an accident happens while the car is driving, the driver may mistake the accelerator for the brake due to nervousness. Due to excessive force, the switch K at the lowest part of the accelerator is often closed. The author designed this control circuit by using the fact that K is closed by stepping on the accelerator.

As shown in the figure, 555 and R1, C1, etc. form a trigger circuit. Usually, 555 is in the set state, pin ③ is high level, and J does not work. Jl-1 and J1-2 are in the disconnected state. When the accelerator is stepped on by mistake, J is closed, and pin ⑥ is at a high potential, so that 555 is reset, J is attracted, J1-1 and J1-2 are closed, and the electromagnetic valve DF is energized, then the high-pressure gas is supplied to the brake mechanism through DF, so that the car brakes and prevents accidents.

It should be noted that the relevant circuits of automobile brakes require high reliability, and the driver should not take it lightly when driving.