Hi,
I have the speed which I can integrate using an op-amp to get the distance. I have a power output from a retro-reflective sensor when a certain point is passed. I was wondering if a device (capacitor maybe?) could store the distance traveled when it receives the power output from the retro-reflective sensor and then give a power output itself once the specific distance has been reached? I am trying to keep the circuit analog but have thought about using a microprocessor.
Many thanks.

 

Hi,
I have the speed which I can integrate using an op-amp to get the distance. I have a power output from a retro-reflective sensor when a certain point is passed. I was wondering if a device (capacitor maybe?) could store the distance traveled when it receives the power output from the retro-reflective sensor and then give a power output itself once the specific distance has been reached? I am trying to keep the circuit analog but have thought about using a microprocessor.
Many thanks.

Welcome to AAC.

Why are you trying to avoid an MCU?

 

Welcome to AAC.

Why are you trying to avoid an MCU?

It's for a project at university and mcu's aren't advised for some reason.

 

It's for a project at university and mcu's aren't advised for some reason.

OK, well what you are looking for is a sample and hold circuit which is a common OPA application. If you research sample and hold and have more questions after trying to work out how to use it, you can ask.

Since this is schoolwork, by forum rules help is limited to assisting with your work not explaining how to do something. I am sure you can get help as you need it if you try to use what you find.

 

Analog Sample & Holds have drift of the held voltage with time.
How long do you need to hold the values?