Post #4025235
2026-07-23 02:23 UTC
@deprecated_ii@poa.st @snappler@poa.st maybe the air isn't necessary at all
have like a fat horizontal section of pipe as the mixing chamber, maybe with some shit shoved in there to make it take a whirly path and mix, shut off flow and add a solenoid on top to vent out the leftover pressure to a drain that opens for like a second, dispense the chemical into the chamber, shut off the fill solenoid, and open the supply solenoid.
but that'd require a fixed amount of water every time, or some calculations on how long to run the metering pump. possible, but it means adding a microcontroller.
i don't think i could do that smaller than like a 6 inch body with a 20 inch stem off the bottom and a couple pipe fittings on the sides.
Replies (1)
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@deprecated_ii@poa.st 2026-07-23 03:14
@skylar@misskey.yandere.love @snappler@poa.st yeah my first idea was an inline mixing chamber of some kind, but I thought of the pressure injection idea when I was thinking through the issues with my overcomplicated mixing chamber concept and it just seemed like a better idea because it can be so small and it can be arbitrarily scaled. downsides being it's probably a bit more expensive, with somewhat more complexity the air volume required would be quite small, I imagine. idk if you keep your air system pressurized though I can see how you might make either system work without a microcontroller but it would surely be easier to just use an arduino with a relay shield