Hi everyone:
I have to setup a timing system where:
- A piston moves inside a cylinder, measuring volume, I have all that setup already, need help with the electronics.
- A photocell will detect the piston moving at certain point and should be able to start a timer.
- A second photocell will detect the raising cylinder and stop the timer. At this moment, the cylinder will lower, but the timer should not reset or start over, but instead it should keep the time measured for the technician to record it.
We have some aromat sensors, they can be setup for NPN or PNP (NO/NC), they work with 12-24 VDC, and we can make them work, no problem.
I need some ideas, help with the timer controlling circuit. Our timers start with a NO switch, and they keep counting as long as the contact in the switch is closed, as soon as the contact opens, they do stop the timing.
Thanks.
I have to setup a timing system where:
- A piston moves inside a cylinder, measuring volume, I have all that setup already, need help with the electronics.
- A photocell will detect the piston moving at certain point and should be able to start a timer.
- A second photocell will detect the raising cylinder and stop the timer. At this moment, the cylinder will lower, but the timer should not reset or start over, but instead it should keep the time measured for the technician to record it.
We have some aromat sensors, they can be setup for NPN or PNP (NO/NC), they work with 12-24 VDC, and we can make them work, no problem.
I need some ideas, help with the timer controlling circuit. Our timers start with a NO switch, and they keep counting as long as the contact in the switch is closed, as soon as the contact opens, they do stop the timing.
Thanks.