Flash blinky lights circuit

A very simple flash light circuit can be designed using common electronic components . As you can see in this flash light circuit schematic, this electronic project can be designed using few electronic components . When the S1 switch is closed , power is applied to U1 and U2 .

Two inverters of U2,a 4049 hex inverter buffer , are connected in a low frequency oscillator circuit that feeds clock pulses into U1, a 4017 decade counter . Outputs 0,2,4,6 and 8 of U1 are coupled to the gate of Q1 through a 1N914 diode . As the 4017 counts down , it turns the light on and off four times and then leaves it on until the S1 switch is released .

The on off rate can be set by R2 potentiometer . For best results , the on off rate should be set so that it is rapid .
This flash light electronic project must be powered from a 12 volt DC power supply .