1: PCB; 2: Solder; 3: White LEDs; 4: Wire; 5: 10kΩ resistor; 6: Switch (it can be a momentary switch); 7: Battery holder for 4 AA batteries; 8: 10μF Electrolytic capacitor; 9: 555 timer (NE 555).
1: Wire clippers; 2: Soldering iron or gun; 3: Hot-glue gun; 4: Knife for stripping insulation from wire.
- Solder all parts together on a small PCB according to the diagram at left.
- By changing the value of R1 you can change the speed of the LED's blinking. You can also add a 10kΩ potentiometer trimmer instead of R1.