circuit design 555

Submitted by Ken on

This is what I need

When input voltage in applied, output in high.

When input voltage is removed, output is low,  and starts a time delay

that will not be affected by applying another input voltage, until the time delay

is finished. After the delay is finished, the cycle will repeat.

Aswinth Raj

  Joined August 16, 2016      1000

Tuesday at 12:29 AM

Hi Ken,

I would suggest you to use a 555 timer in mono-stable mode for your application. In which you could calculate your time delay by using the formulae

T = 1.1 * R * C, Where R and C are the resistor and capacitor connected accross 8,7 and 6,Gnd respectively.

 

Refer: http://circuitdigest.com/electronic-circuits/555-timer-monostable-circu…

          http://circuitdigest.com/electronic-circuits/flashing-led-using-555-tim…

 

You might wanna tweak the design a bit by using a NOT gate to inverse operation. If you get stuck somewhere let us know we will help you out.