Tragic day for my snakes.

[tcutting]

if you want to go crazy here is another... https://www.amazon.com/gp/product/B0...d_i=6291364011

[Aste88]

Sorry I guess I haven't been clear. Those are analog dimmer, they might be a good idea after the relay but that's not what I'm referring to. I'm talking about digital ones that can be controlled trough the GPIO and substitute the relays. Good thermostat like the herpstat aren't on-off and are able to keep the temperature more constant. They do that by either dimming (not sure how) or using a proportional function to calculate when turn on or off the heat (like sending pulses).

Since you're setting up such a good system I'd suggest going for a proportional relay.

Edit: not sure if I'm looking at them right but they seem expensive, maybe you can implement it software side like this https://learn.adafruit.com/sous-vide...rtional-output

[AbsoluteApril]

I'm very sorry for your losses

[tcutting]

Sorry I guess I haven't been clear. Those are analog dimmer, they might be a good idea after the relay but that's not what I'm referring to. I'm talking about digital ones that can be controlled trough the GPIO and substitute the relays. Good thermostat like the herpstat aren't on-off and are able to keep the temperature more constant. They do that by either dimming (not sure how) or using a proportional function to calculate when turn on or off the heat (like sending pulses).

Since you're setting up such a good system I'd suggest going for a proportional relay.

Edit: not sure if I'm looking at them right but they seem expensive, maybe you can implement it software side like this https://learn.adafruit.com/sous-vide...rtional-output

I think you are referring to solid state relays that can act as variable resistors(sort of anyway) in conjunction with being a relay.

http://www.crydom.com/en/products/pc.../cx241-series/

https://www.amazon.com/Anycubic-8-Ch...id+state+relay

Otherwise the only thing I can think of is a straight up solenoid/variable resistor controlled electronically.

[tcutting]

As an update I have gotten the raspberry pi to be able to trigger relays in tests of just how the pi communicates with the relays both via the command line and via a python script. Today I just finished up reading three temp probes in parallel. Making progress. Just need to start working on the programming logic of probes to trigger the relays now. Shouldnt be that long to get at least a 1 probe 1 relay system working. Alerts and emails are on phase 3.

[Creepy Alien]

Sweet!... Please keep updating this thread (I don't know anything about the programming aspect of this, but I find it extremely interesting).

[tcutting]

Sweet!... Please keep updating this thread (I don't know anything about the programming aspect of this, but I find it extremely interesting).

Thanks. I had missed sometime to work on this for a few weeks but was able to start to dive into it this week. my goal is to have a working 1 probe 1 heat element working by sunday evening. The hardest part will be mapping the probes to each heat element as they report in with serial numbers that arent really human readable or friendly.

Also I read up a lot on what Aste88 was referring to and really like where their head was at. I will be going with solid state relays, and seeing about a timer based logic to prevent heat elements exceeding a threshold. but that will take time testing and practice. Maybe other ideas to get done what he was talking about.

I will say as I am going through the process, the engineering behind it is a challenge for sure. Trying to make something that gives me all the features, safety logic, and control I want is not easy. But If it was easy it would be already done and a product or everyone would be doing it.

I also plan on sharing my work with everyone once everything is completed as well, so others can do similar if they wish.

[Aste88]

Found a board that would work well to replace the relays

http://www.electronicnuts.com/4-chan...atible-5060hz-

[tcutting]

Found a board that would work well to replace the relays

http://www.electronicnuts.com/4-chan...atible-5060hz-

Awesome find. I will reach out to these folks and see what I can find and what sort of help they can give me.

I see this as the right way to go if I can make it work.

[Bmocken]

I have the Zilla Thermostat and I'm confused as to how it didn't shut off? It has a safety feature built in that is supposed to trigger in this very circumstance.