I am looking if anyone can help me make a timer circuit with an input and output switch

[Josh Pal]

I have a timer with one input/output switch but I need to wire it with one photovoltaic or infrared motion sensor to start the timer and one to stop it.

 

[Bluejets]

What range of timer?? If short time then a mono 555 ....pulse to start on terminal 2, reset on terminal 4

 

[Josh Pal]

Will this hold the timer or reset it to zero

 

[Bluejets]

Reset to original state.

 

[Josh Pal]

I need to drop something and time it is that possible

 

[AnalogKid]

If you already have the timer module/device/whatever, please tell us what it is, or post a link to where you bought it, or post a photo. Two LED / photo transistor light beam detectors can capture a falling object, but there are a zillion different timers in the world.

ak

 

[Josh Pal]

This is what I can get

 

[Bluejets]

Difficult to say without knowing the specs. If you need to time a falling object then a count up timer in milliseconds would probably be a good start.

 

[Josh Pal]

Would a count up timer be fairly easy to connect with the sensors

 

[Bluejets]

If input sensors have a switch action they may need to have a small circuit addition to give a short pulse similar to say a button press. That is fairly easy to do with a transistor and a capacitor maybe a resistor or two. Depends really on how much you know or are prepared to study- up on.