Just a quick update on the Gasifier Gauges project: Based on the great feedback received, I’ve added a scrolling feature to the ‘user set’ menu, as well as changed some of the default thermocouple channel descriptions. Video here:
Things I forgot to mention in the video: the scrolling feature can be disabled by setting the scroll speed to zero. Also, the relays will also be triggered by timers if desired, instead of waiting for process conditions to get out of their happy zone.
I have some Red/Yellow/Green light displays left over from a past project, see pic below. These could be used instead of or in addition to a thermocouple display, with adjustable temperature setpoints for each color. We could even overlap ranges, such as: Red is way too hot (likely causing damage), Red and Yellow is too hot but not doing any damage, Yellow is just right, Yellow and Green is too cool but not making tar, Green is too cold to run the engine on. We could even flash different lights for further warnings (green flashing: you’re making tar!!! or red flashing: reactor meltdown!!!). Just brainstorming…
If space for all three lights is a problem, I have some tri-color leds (to the left of the Red/Yellow/Green displays in the pic) that could serve the same purpose and save space. For color blind users, maybe the individual lights would be better so light position would mean more than color. Also have some weatherproof RGB strips shown in the pic, maybe these could be used for outdoor units.
Speaking of outdoor units, I’ve been toying with a weatherproof Gasifier Monitor with a 2-line by 16-character display and membrane keypad, pictured below. Still working on the programming for it. Snowed in this weekend so should have some time to work on it!