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555 MONOSTABLE EXAMPLES

V. Ryan © 2006

 

A number of 555 monostable example circuits are seen below. They are all based on the same circuit (DIA. A). The switch must be presses each time to light the LED as the timing cycle only works once.

DIA 'A'

 

 
FURTHER EXAMPLES

The bulb only illuminates when the push switch is pressed. It works once and then stops. The switch must be pressed again for the bulb to light.

Increasing the value of the resistors and capacitor extends the time the bulb is illuminated.

The LED only lights when the push switch is pressed. It works once and then stops. The switch must be pressed again for the LED to light.
A 330 ohm resistor has been added to protect the LED. Without it the LED would ‘blow’.

Increasing the value of the resistors and capacitor extends the time LED stays illuminated.

The motor spindle only turns when the push switch is pressed. It works once and then stops. The switch must be pressed again for the spindle to rotate.

Increasing the value of the resistors and capacitor extends the time the spindle turns.

   
 
   
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