Board issues
- Thread starter MobileMe
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I'll give that a try. Thanks
CAI_Support
Senior Member
Could you please send all your configuration to us at [email protected]? We like to find out from you what was firmware version, what other components on the board? If possible, we could get hold of your setup, so that we can see what is going on? Sorry for the problem, and thanks for letting us know.
When I get an opportunity, I'll send you the info. Thanks.
I removed both of the new temperature sensors and the board seems to be working fine now. I hate to think that one of the sensors is bad. They were a real pain to install and running the wire was no picnic either.
On a side note, four of the digitals inputs are not working either. That one was my fault. I put to much amperage to one of the digital inputs when trying to figure out when my condensation pump was running.
I think the board is not running at 100% anymore. For that reason it could also be the board. As soon as I get another board, I plan on sending the broken one to CAI so they can see if they can fix it. This board was first run at home automation. I've had the board for almost a year and have learned a great deal about circuits. Mostly what not to do!
If anyone knows a CO sensor that I can hookup to the board, let me know.
Thanks,
Mike
On a side note, four of the digitals inputs are not working either. That one was my fault. I put to much amperage to one of the digital inputs when trying to figure out when my condensation pump was running.
I think the board is not running at 100% anymore. For that reason it could also be the board. As soon as I get another board, I plan on sending the broken one to CAI so they can see if they can fix it. This board was first run at home automation. I've had the board for almost a year and have learned a great deal about circuits. Mostly what not to do!
If anyone knows a CO sensor that I can hookup to the board, let me know.
Thanks,
Mike
You can try this one:
http://www.ebay.com/itm/251179736436
In addition, you can search for MQ9, MQ7, MQ2 sensors.
http://www.ebay.com/itm/251179736436
In addition, you can search for MQ9, MQ7, MQ2 sensors.
Doesn't this sensor need to run at 1.5v for 30 seconds then 5v for 10 seconds to detect CO? I have one of these sensors, but it needs voltage change to get CO readings. I don't know how to do that with the Webcontrol board.
CAI_Support
Senior Member
You are correct, MQ-7 requires to have 1.5V 90 second+/-1S, then 5V 60 seconds +/-1S. You read the sensor out at the low voltage period.
I think you can control the voltage with 1.5V low voltage is always on, then every 90 seconds turn on one TTL output control a relay providing 5V for 60S.
I think you can control the voltage with 1.5V low voltage is always on, then every 90 seconds turn on one TTL output control a relay providing 5V for 60S.
I didn't think the board has a 1.5V output. If it does, where is it?
5V-1.5V = 3.5V. You could just put a 3.6V zener in series with it and run it straight off the 5V line (1.4V is probably close enough), and then as previously offered, a relay (or high-side transistor switching) to give the 5V pulse. Seems pretty trivial to me actually!
What do you mean by trivial?
Four or five lines of code, a transistor, a resistor and a zener.....
It might be trivial for someone whom has experience with building advanced circuits, but for some of us it is not so trivial. I'm a network admin that does home automation for fun. I don't do much board level work so there is a learning curve for me. With respect, trivial it is not from my point of view but I do like to learn.
Sorry, no offence intended. If I get a minute this afternoon I'll sketch something for you that should work.
I too am a network admin (Unix servers plus all the routers etc) - but have been in electronics R&D and manufacturing for 35 years, so perhaps my perspective is different...
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