1-Wire clocks for run time monitoring?

[dBeau]

I'd like to use a 1-wire network to monitor my heating system. The temperature sensing seems easy. However, I'd also like to monitor run time on my burner and circulators. A CT and something like the HVAC monitor board are almost what I am thinking of, but if I understand it correctly, the HVAC board will only tell me if the burner is currently running. I'd rather a device that can answer the question "how long has the burner been running?". The idea is that I dont want to worry about the polling frequency. So something like a 1-wire clock that only ran when a contact was closed would be ideal. This way, I could poll as little as once per day or longer and still determine how long the burner has run since the last polling time. Does this sort of thing exist?

 

[ericvic]

We don't have a device like that but I had heard of a device that used a DS2423 counter and a 555 circuit that would count when triggered by an external event. I don't remember where I saw it though.

Eric