Circuit diagram
Components:
47k x 4
100R x 2
100k x 1
22uF/25V x 1
BC337 x 1
LM358 X 1
9V or 12V battery
5mm white light LED 5V x1/x2
This circuit works for both 9V and 12V dc power supply.
When you change the capacitance, the rate of flashing change.
Higher capacitance gives lower rate of flashing.
