Recent content by jspoon

Thanks to all who have responded, this has been very interesting and helpful, with lots to consider.   Jay

Does this look reasonable?                  1.5K           |--------|          O----------/\/\/\/\/\---------|led     |------------  WC                               |        |                               |  Opt   | O-----------------------------|        |------------...

Sorry, what is a PM?

sorry, duplicate post, it said it failed...

I recently ordered a wc from smarthome and assume I got a wc8 (it did not indicate which it was as far as I can tell) and did not see any other options.  When I go to the CAI site, I only see one WC, not two.   So, has the WC32 shipped?  If yes, how do you know where to get it?

mwester, that I/O board is interesting, and of course expensive :-)  However, they had a schematic of the board and if I am reading it correctly, they simply have an optocoupler and a 1.5K resistor on the input?    That seems pretty simple to put together...   Ross, how much extra room do I have...

I am new to this board and hardware, so I may be missing something...  It appears to me that the area of TTL input had kind of been ingored.  Since I had not thought about the protection aspect, I expected some very simple solution, but it seems ICs are involved. For the analog input, we have...

OOPS, ignore my previous comment, that is for output control, not input...

Actually, I see a lot of small cards that have relays on them that say they can be driven directly by a micrprocessor and are only like $9...

Should have stuck with software, this hardware stuff hurts my head :-)   Thank you for the responses.  It sounds like the optical isoloation is the safest route to go...   Ross, I believe you have some boards that have logic to help with analog levels (certainly not there yet, since I cannot...

I now have my wc 2.2.2 up and running with a whopping one temperature sensor, so now want to play with input.  I have several alarm sensors that I want to monitor.  It basically just closes a switch inside, right?  So, can I just put 5 volts from the wc on one side and route the other to the...