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A project log for Toast-R-Reflow

Yet another toaster oven -> reflow oven conversion

Nick SayerNick Sayer 05/20/2015 at 03:483 Comments

If anyone reading this has a Toast-R-Reflow controller, please go get the latest firmware from Github.

The change adds support for the AVR watchdog. The oven at The Hacker Dojo was discovered wedged somehow with one of the elements turned on. It's not immediately clear what happened, or if the watchdog would have prevented it, but the watchdog certainly can't prevent anything if it's not used.

Discussions

Analog Two wrote 04/19/2016 at 18:57 point

Enabling the watchdog on a microprocessor enabled a product I was working on to pass a higher level of ESD testing. I think the watchdog HW itself (just a counter really) is more robust than the other portions of the microprocessor.

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davedarko wrote 05/20/2015 at 07:41 point

that's something where I'd always cut mains afer use.l, but then again people are forgetful.

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Nick Sayer wrote 05/20/2015 at 13:34 point

Yeah. It's my bad for not using the watchdog in the first place. It couldn't hurt, it's easy and free, and it could have prevented that incident.

That said, I leave my oven plugged in 24/7, and I've never seen anything like that happen. And the oven in question had been sitting with one of its elements on for hours and nothing untoward happened so far as I know (probably because the oven was designed originally to be fail-safe).

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