Counting thermostats opening and closing

[renewblescott]

I've made a test rig that tests thermostats opening and closing.

I have fifteen stats on test. I'd like to count the switches opening and closing. Can I put a small DC voltage through the switches and measure this going from +V to 0 and counting the pulse.

Is there something on the market I could use? Nice and simple as I am a meterials engineer not a programming/hardware wizard!

 

[BrianE22]

Counters are available from McMaster Carr:

http://www.mcmaster.com/#digital-counters/=eunwdu

Some can sense a low to high voltage transition.

 

[ornerynorsk]

A dry contact counter will count the simple opening and closing of a switch, no voltage involved. Ideal for thermostat testing. We use these on our cycle test rigs. They are very reliable and won't introduce anomolies into other electrical equipment.

http://www.grainger.com/Grainger/RE...cm_sp=IO-_-IDP-_-RR_VTV70300505&cm_vc=IDPRRZ1

It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.

 

[LunaApplication]

This may help you with counting opening and closing switches.

http://www.icpdas-usa.com/products.php?PID=503

16-channel Non-Isolated Digital Input Module with 16-bit Counters
Dry contact:
logic level 0: close to GND
logic level 1: open

Or there maybe more choices on here:

http://www.icpdas-usa.com/digital.php

Luna/AE

http://www.icpdas-usa.com