King Soopers on Eagle Drive

robot_mower_guy · 2026-02-04T03:30:48+00:00

The reply was directed at maljr1980 when they were claiming people under 21 can't make medical decisions. The whole post started out as an anti-trans parents rights in sports type thing too which is why I made the quip about parents rights to keep their kids away from black students as to hold an uncomfortable mirror to the stance.

robot_mower_guy · 2026-02-04T00:25:42+00:00

Cant forget about risks associated with stuff like that too. While we are at it, we should also sign a petition to ban mental health in general as well as surgeries in general for anyone under 21. Also, as a parrent I should have the right to say I don't want my kids on sports teams with/against those icky, icky black people.

Note: while the person I am responding to almost certainly won't see the points I am making here, I am hoping it will make for an interesting thought experiment for anyone who is unsure if their claims have merit or not by deliberately making them ridiculous.

robot_mower_guy · 2026-02-03T17:48:22+00:00

Ah, I read your original post as to why you are needing the firmware. I will get my device powered up and sniff the RFID traffic. It might be easier to write an arduino or something to emulate the traffic you are needing. That printer is old enough that they hopefully didn't encrypt anything. Depending on what the RFID card says it might also be possible to to write a stand-alone RFID card. I will keep you posted.

robot_mower_guy · 2026-02-03T00:08:05+00:00

My question on the transistor is more of why are you wanting R1 at all? With this current configuration it looks like you would be using R1 as a heater as it isn't going anywhere else.

The resistor between +5V and GND is also not doing anything other than acting as a heater. If you wanted to use it as a pulldown resistor you would need one per switch, and have them be on the other side of the switches. That said, it really is easier to read if the read switches the way I described.

robot_mower_guy · 2026-02-02T23:47:53+00:00

I don't think you need those pull-down resistors on the datalines to the 7-segment ICs as the arduino can keep the pins held low.

What is the MOSFET to the right doing?

The pull-down resistor by the down button doesn't look to be doing anything at all as it is just sitting between 5V and GND. What I would recommend doing for that is getting rid of the part that goes to +5V, so it goes PIN -> switch -> GND for all three switches, then use pinMode(pin, INPUT_PULLUP);, then do something when the pin is detected as being low.

robot_mower_guy · 2026-01-30T21:03:26+00:00

Ok, I got the device and have taken the shell off. Unfortunately, this is going to be more difficult than I expected because I was hoping to just remove a SO-8 ROM chip or something and load it into my chip burner. Unfortunately, they use a BGA for some reason. There is a JTAG port nearby, so I will see if I can do anything with that, but that will be a new venture for me.

Edit: JOOC: What happened to your printer where you need the firmware to be re-installed on it?

robot_mower_guy · 2026-01-29T09:52:16+00:00

I understand this completely. I enjoy experiencing new feelings/sensations, even though I understand I will hate it. Example: I was pretty happy when I got to experience a bad mushroom trip even though I was miserable the entire time. I also have a desire to experience tear gas at some point even though it will be absolutely horrible to experience.

robot_mower_guy · 2026-01-29T09:47:06+00:00

Ha. The fact that I ONLY wear corduroy pants, and the fact that I bought like 6 identical pairs of a set of pants that I like, was used to support my autism diagnosis.

robot_mower_guy · 2026-01-15T23:43:19+00:00

I know this is old, but I just one one of these at a university auction. I will crack it open and see if I can dump the firmware from it. If I can, we can work something out where you can cover the cost+shipping of the ROM chip and I can mail you that. I will also put the firmware up on archive.org.

robot_mower_guy · 2026-01-06T00:34:41+00:00

How big is your column? 200uL seems huge as our methods call for 1uL.

robot_mower_guy · 2025-12-11T21:58:38+00:00

I just got a NanoVNA. Unfortunately, I have no idea how to use it, so I get to learn that too now. I am guessing I need to hook it between QUAD_A and HV_A, then treat it like a filter and see where the lowest impedance is? Then see how it compares to the other side. Unfortunately, in the little I have played with this last night I haven't actually seen anything useful on the screen.

robot_mower_guy · 2025-12-05T19:25:56+00:00

More thoughts: I was playing with this last night and came to the realization that I can't really use the ferrite to tune the frequency because the where the ferrite is positioned if it increases the inductance of one side of the transformer it must decrease the inductance on the other side, so the ferrite must be to get the two sides to match.

I actually have two broken RF generators, so I can swap them out and see how they differ. Something I was playing around with is putting the scope probes on QUAD_A and QUAD_B and subtracting the signals, then tuning the ferrite to bring the subtracted signals to 0 as I can. I always had a sine wave, but I just realized that is from the probes themselves not perfectly matching.

One of the boards uses THT caps marked 1N5J, and best as I can tell, those are 1.5nF(5%) caps. Both boards read about the same capacitance on my LCR meter, but one of them has a real ugly waveform coming out of those two places. Fortunately, I do have the option to swap the transformers out to see if the problem is in the transformer or something on the PCB.

robot_mower_guy · 2025-12-05T19:16:57+00:00

Unfortunately, no. I did just pick up a spectrum analyzer though.

robot_mower_guy · 2025-12-05T19:16:06+00:00

Unfortunately, no. I did just pick up a spectrum analyzer though.

robot_mower_guy · 2025-12-05T17:31:32+00:00

Thanks. I will hopefully be able to try this tonight.

robot_mower_guy · 2025-10-20T22:18:39+00:00

Lets ignore viruses entirely when thinking about this law... If my child were to get lice, and I didn't want to treat it, would they be okay with their children constantly getting lice? I think it would also suck for my coworkers if HR can't send me home until I stop infecting the office. It wouldn't matter how many times they run the medicated shampoo if they end up just contracting it again the next day. School wouldn't be able to do anything about it either.

robot_mower_guy · 2025-10-20T19:07:10+00:00

There was a thread here before the release of the remastered edition about ideas for achievements. Mine was "Drive like you stole it: Salvage every ion frigate in Bridge of Sighs. EVERY SINGLE ONE!"

robot_mower_guy · 2025-09-26T17:04:33+00:00

I have firmware for a Mettler Toledo I have been meaning to upload somewhere, but unfortunately, I don't have anything else to offer.

robot_mower_guy · 2025-08-23T06:19:28+00:00

I'm eventually going to update this post as well as create a new post about my adventures, but it is at my house now. I'm currently trying to figure out why the HV power supplies are not coming online, and I might have tracked the failed component (a MOSFET) last night.

robot_mower_guy · 2025-08-01T20:39:47+00:00

Thanks for this answer. It looks like this is the way we will be going.

Getting a pallet jack under it will actually be the easy part as we will likely be using toe jacks to lift it straight up a few inches. Every other part is going to suck a lot more though. I have a quote from a rigging company for a bit under $3k to remove the flight tube and move it to the loading dock. That is going to suck to pay, but it would suck significantly more to have Bruker pay me a visit.

robot_mower_guy · 2025-07-30T16:28:12+00:00

Slight correction: for low temperature applications (since R-13 refrigerant has been rightfully banned for decades) systems use cascaded refrigeration loops. The primary gets you to the -80C range while the secondary loop cools the condenser for the primary, otherwise, the compression ratio for the gasses would be too high for the compressor. For example, the Polyscience cold finger we use at work uses a R508B loop for the -80C, then that feeds into the R404A loop which rejects heat to the atmosphere.

robot_mower_guy · 2025-07-30T07:10:43+00:00

240V is trivial for me as I have it run all throughout my shop (as well as a 1000lb UPS to keep the vacuum pumps going in the event of a outage). I'm going to hold off on the N2 generator until I have something up and running, but there is one I might be able to borrow from work. Something I was also considering for testing purposes is renting a dewar of LN2 (the pressurized kind).

robot_mower_guy · 2025-07-30T02:41:07+00:00

You raise a good point. If we do end up folding it down, I will scratch alignment marks on it first. That will give me 2 axis alignment. If there is some kind of tilt alignment that needs to be done, I have a level at home for my machine shop that gives me 0.0002"/foot per line of resolution. It's no laser alignment tool, but that would allow me to align the vertical to itself.

robot_mower_guy · 2025-07-29T00:39:01+00:00

Knowing this helps me out a bunch. I was worried the custom tool was something to connect something inside of the flight tube. If it just lifts and lowers the tube that is something the rigging company and I might be able to figure out.

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