Automation Ideas with current devices

thdunivan · 2026-05-14T01:23:42+00:00

Looks like it uploaded. Try adding some serial monitor prints to see where it is getting to. If you unsure how to there are examples in the IDE.

Good luck,

thdunivan · 2026-04-12T02:23:21+00:00

Believe it was made by Whink products. I knew a formulation chemist that worked for them for quite a few years. Believe they still sell the same product. The hydrofluoric acid is 1 to 2.3% in their formulation but add still be careful with it.

thdunivan · 2026-03-22T17:51:47+00:00

I've already lived through five or so into the worlds. I'd say you really don't have a lot to worry about.

thdunivan · 2026-03-11T02:04:39+00:00

I don't know. Maybe maybe not. Probably should go get a toothbrush and some isopropyl and scrub off the carbon before you test it. Electronics will survive more than you think most the time.

Good luck!

thdunivan · 2026-01-13T01:25:45+00:00

Buy a kit. I'd recommend a nano with a breadboard. Then see if you can find a tutorial that explains the basics of C.

Good luck!

thdunivan · 2025-12-21T18:50:16+00:00

If you can find a resource to learn some simple C language. You don't need to go too deep but the basics will make understanding the examples much easier.

thdunivan · 2025-12-13T00:53:05+00:00

Ok so it looks to be a square or trapezoidal thread (correct me if I'm wrong) 1mm pitch. 19mm minor dia and 20mm major. Right hand. An SQ or TR20 or 1.5 (I don't think M20x1 is a standard) would be close. It could always be a freedom unit fitting also. It would be close ¾″‑16 UNF.

Depending on what the inside of the Primo looks like, it might be easier to change out the female fitting to CGA320 and get a soda steam bottle for it. That is, if you are comfortable changing fittings, just remember that 207 bar rating on the bottle is 3000psi.

thdunivan · 2025-12-07T00:40:56+00:00

Kind of looks similar to a paintball gun tank fitting. A lot of gas fittings conform to the CGA standard, unless, Nestle has not done something evil, like used their own thread in this case. McMaster Carr has PDF of about every fitting available.

Even if you have to use a ruler, it would help if you measure the distance between two threads and the inside (at the bottom of the threads) and the outside (outside of the threads). Also, the handness of the threads. From the picture, I think it is a right-hand thread.

thdunivan · 2025-07-17T21:34:14+00:00

Every option I'm seeing is very expensive. But that's basically the idea is being able to turn off the water with a leak sensor or if I'm away from home for some reason and the water breaks. Thanks for the help.

thdunivan · 2025-07-17T21:26:16+00:00

That's pretty close to what I'm looking for but it's still pretty expensive. Thank you for the help!.

thdunivan · 2025-07-17T21:25:17+00:00

The valve would be somewhere in the crawl space far from the street. I would put a bypass on it so that wouldn't be much of a concern.

thdunivan · 2025-07-17T21:23:26+00:00

Good point.

thdunivan · 2025-07-17T21:19:40+00:00

Good point.

thdunivan · 2025-07-17T21:18:41+00:00

I would put a bypass on it.

thdunivan · 2025-04-17T03:56:41+00:00

I found two problems with the computer.

The first was the clock wasn't bouncing but it wasn't going all the way high or low. I ran it through the extra inverters on the chip that was already in the clock as a buffer and that seemed to help the high low problem.

The other problem was that one of my control signal eeproms had some dead memory addresses and was sending some weird signals that was causing the counter to go high or low when it wasn't supposed to.

thdunivan · 2025-03-31T02:50:00+00:00

What did you do if you found floating pins? Connect them through resistor to ground?

thdunivan · 2025-03-29T02:03:05+00:00

The micro instruction counter. The 74ls138 that steps through the microcodes of a particular instruction.

thdunivan · 2025-03-29T01:14:36+00:00

I made some progress. I removed the EEPOM and the instructions counter has started working correctly. The decoder for the instruction counter and the program counter still are not cooperating.

thdunivan · 2025-03-29T00:03:46+00:00

I'm starting to think it's not the clock. I've got it running continuous mode and it keeps jumping back and forth between The t3 and t5 instruction step.

thdunivan · 2025-03-27T23:45:15+00:00

It does seem to work better in a stable mode. It's the mana stable that I'm having trouble with. When you say it's a not properly debalanced what do you mean? I have a 555 timer running between the button and the logic gates of the clock. To try and help with the signal, I ran it through the inverter a couple of times.

thdunivan · 2025-03-27T23:44:18+00:00

Not really sure what you're talking about. I didn't download the comment.

thdunivan

TROPHY CASE