3 ms·

Won't work with gas burners, of course

snthd 5y ago
It's not a million miles away from it though. Typically gas stoves have a failsafe safety system that uses a thermocouple to keep the gas on only when there's enough heat. If you used a timer to break that safety circuit (relay?), the solenoid will revert to it's safe state, and turn off the gas. Doing that safely may be difficult. And doing anything with a gas installation may be illegal, depending on where you live.
- lathiat 5y ago
  In Australia this has only been legally required since 2017. My 2014 new house stove doesn't have it. Likely country dependent (I think more commonly it restarts the igniters instead of cutting the gas)
- dang 5y ago
  Sorry for the offtopicness but could you please email hn@ycombinator.com? I want to send you a repost invite.
rainbowzootsuit 5y ago
A normally-closed gas solenoid valve is a readily available item for about $200. https://www.mcmaster.com/gas-solenoid-valves/solenoid-on-off-valves-for-natural-gas-propane-and-butane-9/ https://www.mcmaster.com/gas-solenoid-valves/solenoid-on-off... Combine with a countdown timer: https://www.intermatic.com/Catalog/us/Products/In-Wall-Controls/Spring-Wound-Countdown-Timers/FF32H https://www.intermatic.com/Catalog/us/Products/In-Wall-Contr... At ~$1200 DIY is a add-on fire suppression system for the range that would include a similar gas valve or contactor to shut down the range if fire suppression activated plus fire alarm klaxon and alarm system tie in possibilities. https://guardianssi.com/ https://guardianssi.com/
- hagbard_c 5y ago
  You can get those solenoid valves for around $20 online (e.g. [1]), that one is scandalously overpriced - a replacement coil costs $160... [1] https://www.amazon.com/Beduan-Electric-Solenoid-Normally-Colsed/dp/B07N6246YB/ https://www.amazon.com/Beduan-Electric-Solenoid-Normally-Col...
  - rainbowzootsuit 5y ago
    McMaster tends to be that way, but it's got such a great catalog, that's why I end up there. I appreciate you forwarding the link for a more reasonable priced option.

It's not a million miles away from it though. Typically gas stoves have a failsafe safety system that uses a thermocouple to keep the gas on only when there's enough heat. If you used a timer to break that safety circuit (relay?), the solenoid will revert to it's safe state, and turn off the gas. Doing that safely may be difficult. And doing anything with a gas installation may be illegal, depending on where you live.

lathiat 5y ago
In Australia this has only been legally required since 2017. My 2014 new house stove doesn't have it. Likely country dependent (I think more commonly it restarts the igniters instead of cutting the gas)
dang 5y ago
Sorry for the offtopicness but could you please email hn@ycombinator.com? I want to send you a repost invite.

rainbowzootsuit 5y ago

A normally-closed gas solenoid valve is a readily available item for about $200. https://www.mcmaster.com/gas-solenoid-valves/solenoid-on-off-valves-for-natural-gas-propane-and-butane-9/ https://www.mcmaster.com/gas-solenoid-valves/solenoid-on-off... Combine with a countdown timer: https://www.intermatic.com/Catalog/us/Products/In-Wall-Controls/Spring-Wound-Countdown-Timers/FF32H https://www.intermatic.com/Catalog/us/Products/In-Wall-Contr... At ~$1200 DIY is a add-on fire suppression system for the range that would include a similar gas valve or contactor to shut down the range if fire suppression activated plus fire alarm klaxon and alarm system tie in possibilities. https://guardianssi.com/ https://guardianssi.com/

hagbard_c 5y ago
You can get those solenoid valves for around $20 online (e.g. [1]), that one is scandalously overpriced - a replacement coil costs $160... [1] https://www.amazon.com/Beduan-Electric-Solenoid-Normally-Colsed/dp/B07N6246YB/ https://www.amazon.com/Beduan-Electric-Solenoid-Normally-Col...
- rainbowzootsuit 5y ago
  McMaster tends to be that way, but it's got such a great catalog, that's why I end up there. I appreciate you forwarding the link for a more reasonable priced option.