This is an amazing LED flasher that run by only 1.5v AA battery.
The circuit based on joule thief method.
main circuit was designed by handmade choke coil but i change that to this new circuit that don't need to coil making because that was very difficult.
you can use an electric zapper choke coil. the flashing speed can change by potentiometer.
A new 1.5v alkaline battery can run this circuit for more than 30 hours(by lowest flashing speed).
I test this circuit by 25 LEDs but you can add more.
Zapper choke coil usually have 6pin and 3 internal coil. in first you should determine that by an ohmmeter, then put that in the circuit.
the temperature of transistor raise in high speed flashing, so need to a heatsink.
Parts list:
Transistor 2N2222
Resistor 100 ohm
Potentiometer 1k
Capacitor 100uF 35v
Chock coil of old camera or electric zapper or mobile charger
Battery 1.5v AAA or AA
LED
Diode 1N4007
Diac DB3
Parts list:
Transistor 2N2222
Resistor 100 ohm
Potentiometer 1k
Capacitor 100uF 35v
Chock coil of old camera or electric zapper or mobile charger
Battery 1.5v AAA or AA
LED
Diode 1N4007
Diac DB3
