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PWM with 555 timer ic
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parts needed :
555 timer ic
NPN transistor (BD 139)
330 ohms resistor for the base of the transistor
LED with 330 ohms current limitting resistor
1 k resistor ( +vcc to pin 7)
potentiometre 100k
100 nf capacitor (pin 2 to GND )
555 timer ic
NPN transistor (BD 139)
330 ohms resistor for the base of the transistor
LED with 330 ohms current limitting resistor
1 k resistor ( +vcc to pin 7)
potentiometre 100k
100 nf capacitor (pin 2 to GND )
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