Comfort  Automation/ Security System Forums Home
Home Search search Menu menu Not logged in - Login | Register

0 to 10 volt detection
 Moderated by: slychiu
 New Topic   Reply   Printer Friendly 
 Rate Topic 
AuthorPost
 Posted: Wednesday Mar 25th, 2015 02:56 am
   PM  Quote  Reply 
1st Post
Ghyllwood
UCM Pi Users
 

Joined: Friday Mar 27th, 2009
Location: Beverley , United Kingdom
Posts: 53
Status: 
Offline

  back to top

I have a humidity sensor that gives out 0 to 10 volts. Does anyone know if it is possible to read this voltage in Comfort so that I can output a command when the voltage reaches a pre-set value?



 Posted: Wednesday Mar 25th, 2015 05:43 am
   PM  Quote  Reply 
2nd Post
slychiu
Administrator


Joined: Saturday Apr 29th, 2006
Location: Singapore
Posts: 5502
Status: 
Offline

  back to top

We arre developing such  a product but it will still take several  months before it is ready



 Posted: Friday Mar 27th, 2015 01:41 pm
   PM  Quote  Reply 
3rd Post
Ingo
UCM Pi Users


Joined: Sunday Jan 21st, 2007
Location: South Africa
Posts: 562
Status: 
Offline

  back to top

In the meantime you could use a voltage divider to bring the 10V down to 3V. In a case like this you could then read 0-3V as a 0-255 value in Comfort. EG. If your sensor output is 5V then the divider will drop it down to 1.5V and comfort will read 255/2 = +-127 on the analogue port. It's also not extremely accurate as the Comfort internal port resistance will affect your voltage divider a bit but if you just want a setpoint to activate a response then it will probably work.

Just a word of caution, make sure your device output is isolated. Take a voltmeter and measure the device GND to Comfort GND. If there is any potential difference then connecting it up to Comfort might make it go up in smoke - I know, it happened to me.

This all sounds very 'geeky' so if you are familiar with electronics it's all possible. If not then it's best to wait for the new product under development.

Ingo



 Current time is 07:31 am
Top




UltraBB 1.172 Copyright © 2007-2014 Data 1 Systems