بزرگترين وبلاگ کيت های الکتريکی

parts:

U1    NE555 timer IC
R1    2.2k ohm resistor
R2    15k ohm resistor
C1    0.01 uF ceramic capacitor
C2, C3    220 uF electrolytic capacitor
C4    470 uF electrolytic capacitor
D1, D2    1N4002 diode


all resistors are 5 or 10 percent tolerance, 1/4-watt 
all capacitors are 10 percent tolerance 
this circuit rougly doubles the voltage of the input, however the current output is low. doubled output is at 'V source.'