Parts:
R1______________6K8 1/4W Resistor R2____________270K 1/4W Resistor R3_____________22K 1/4W Resistor C1____________220µF 25V Electrolytic Capacitor C2_____________10µF 25V Electrolytic Capacitor D1___________1N4002 100V 1A Diode Q1____________BC557 45V 100mA PNP Transistor Q2____________BD139 80V 1.5A NPN Transistor LP1___________Existing filament Lamp: any type in the range 3-24V 10W max. SW1___________Existing On-Off switch B1____________Existing V DC source: any type in the range 3-24V suited to the lamp adopted
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