Chip S of type 555 timer connected according to the scheme of single-shot which is triggered by touching the touch output. A fixed period of time in the on state is determined by the values of the components of IP, and in this case equal to 4. to increase the time, increase the resistance of the resistor R3 or the capacitance of the capacitor C2; to reduce the time - to reduce these parameters.
The output signal voltage of approximately 9 V output 3 chip IC1 can be used to power the optocouplers, power transistor, field effect transistors, CMOS circuits, etc.
Publication: N. Bolshakov, rf.atnn.ru