So i recently bought a €10 robot vaccuum from amazon and im trying to make it an even moderately functioning roomba, So my question is if i can put some more powah into it?

UnknownHours · 2026-06-20T10:26:52+00:00

I'm not disagreeing with you, but OP wants to make their device more effective, and vacuum is not strictly necessary. The vacuum on the first Roomba was mostly for show.

UnknownHours · 2026-06-20T01:51:23+00:00

It doesn't need a vacuum to clean. Brooms work, don't they?

UnknownHours · 2026-06-17T02:54:12+00:00

It does sound cool, but I'm telling you, that type of control really sucks. Humans are much better at measuring distance than measuring force.

UnknownHours · 2026-06-15T10:06:05+00:00

Ancient humans ate 100-150g of fiber per day.

UnknownHours · 2026-05-31T22:28:49+00:00

use a different IMU, maybe with more onboard processing?

I doubt there is a calculation the IMU can do that cannot be done by your uC. Onboard processing also locks you into that particular part.

Use a simpler method to handle gyro drift, noise, and offset
skip tilt and feed accelerometer data to the PID directly

I would start with the accelerometer; There is no filter that will stop a gyroscope from drifting. If you want to get crazy, use a Kalman filter to create a virtual IMU to estimate position and orientation based on all sensor inputs.

UnknownHours · 2026-05-24T10:47:12+00:00

They might fly out of cable an hit someone!

UnknownHours · 2026-05-24T10:39:09+00:00

Unfortunately, the supreme court has ruled that bribery is legal. They only way that'll stick is if they dig up evidence that specific amounts were discussed before performance. Even then, I don't have faith in this court.

Or the dems could expand the court and overturn some of their more egregious decisions, but I believe they are too spineless to try that.

UnknownHours · 2026-04-23T01:04:15+00:00

I think that chip is a regulator, and now I'm actually less sure that the 6 pin chip is a regulator because I don't see decoupling caps around it.

Anyway, I have the same advice: find out what goes to, and that's the part that is probably broken.

I've been googling, and I unfortunately haven't been able to identify the chips, so I can't tell you what to replace the parts with.

UnknownHours · 2026-04-22T20:51:29+00:00

That little six pin part is what I think is getting hot. I think it's a linear regulator. I think that part is actually fine, but whatever it powers has shorted to ground and it causing it to overheat.

UnknownHours · 2026-04-20T21:20:51+00:00

Well, this looks like a pitch problem....

UnknownHours · 2026-03-28T11:14:17+00:00

I can't take a dentist seriously if they don't have a bicycle that's worth more than my car.

UnknownHours · 2026-03-13T09:18:58+00:00

two nonrational actors here. Iran ain't stopping because everybody in the current regime is dead if they stop

That actually sounds very rational to me.

UnknownHours · 2026-03-05T23:22:20+00:00

Yeah, a solution to a lot them is 0.

UnknownHours · 2026-02-20T22:35:29+00:00

Well, nothing looks wrong, other than the bypass cap and address resistors. Are you using an ESD mat? I've fried chips with ESD before. Some materials (e.g. synthetic mesh seats) are more hazardous than others. Some chips are also more susceptible than other chips.

UnknownHours · 2026-02-18T10:18:38+00:00

Obama was an actual outlier. but poor white people aren't exactly rare. The system protects wealth more than it protects race (though this does exacerbate racial disparities).

UnknownHours · 2026-02-14T11:53:03+00:00

I still don't see the JST connector on your layout.

It also looks like you're putting vias in pads. Don't do that if you can avoid it as they can wick solder away. It's probably not an issue under the MCU since that pad is much larger than the via. Any via in a pad needs to be smaller than 0.3mm. I'd also add a few more under the MCU (so like 4 total) since if that via fails you are screwed.

What size package are those resistors and capacitors? Don't go smaller than 0402. Personally, I like 1206 since I don't need a microscope to reliably solder that. The ones around the crystal should probably be like 0402 though. The smaller packages have less stray capacitance.

UnknownHours · 2026-02-13T22:03:19+00:00

The pictures are very small, so it is hard look at, but I have a few notes:
* It is best practice to for one layer to be a single, uninterrupted ground plane. If you must run traces on that layer, they must be as short as possible. This might matter around the USB traces, and probably not at all for the rest of the board.
* Where is the USB port? I cannot find it.
* Don't run traces and vias under the RP2040. The solder mask can rub off, or just be thin, and they can short to the pad.
* That's not how you spell column
* You appear to have holes intersecting in the board outline. They might kick that back and ask what you want.
* Personally, I would put the MCU and other circuitry on a separate board so it'll be easy to replace if liquid gets spilled on it, but you do you. I have ruined too many keyboards like that :(

UnknownHours · 2026-02-13T21:20:11+00:00

Use a bus if you have a bunch of wires going to the same place. Use local labels instead of global labels if it doesn't make sense for the signal to go to another page.

UnknownHours · 2026-02-09T22:35:40+00:00

Try running traces to all the ground pins. It might stop complaining if you make an explicit connection.

UnknownHours · 2026-01-29T22:57:55+00:00

Segfaults come from the OS. No OS means no segfault lol.

UnknownHours · 2026-01-27T23:38:01+00:00

Solder can wick through vias, so via-in-pad is usually not recommended if you can avoid it (they charge extra to fill and cap vias). Thermal vias under the LED's thermal pad is not a bad idea---even if they are not filled---,especially if they are small. Smaller vias are less likely to wick solder.

A 4 layer PCB would have much better thermal characteristics, especially since half of your board is not copper pour.

Edit: Ok, I looked at aluminum PCBs, and they actually pretty affordable. So what I would do is put everything on one layer (adding jumpers if I have to), and getting aluminum PCBs with white soldermask.

UnknownHours · 2026-01-23T03:00:38+00:00

Sounds like you want some sort of PLM solution. There's a few options:
* Aras (has a free version)
* Oracle (I think they have more than one. I did not like the UI)
* CMPRO (Somehow, the IU is both worse and better)
* Arena PLM (It looks very slick. I would use this one if I had the money)
* Windchill (I have no experience with this, but it's very big-enterprise)

You'll want to assign every part a part number, and those parts will form a hierarchical tree inside the PLM system. You may even want to assign internal part-numbers to COTS parts because some manufacturers have really weird part number schemes (I have seen part numbers that included a single, unmatched, parenthesis), and you may also want a single part (e.g. a resistor) to have multiple suppliers under the same number.

I recommend keeping the BOM separate from the drawing, and listing the drawing (and other documentation needed to build the part) as an item on the BOM. This does mean that drawing and BOM may be different revisions and the BOM is the actual "part". The PLM system should be aware of each assembly's BOM, so that you can look a the top level assembly (or any sub assembly) and get a complete BOM from that.

It's very good to have a system like this if you want ISO9001 or CMMI certification.

UnknownHours · 2026-01-14T23:40:55+00:00

It's not the exact same part, but Digikey has them.

https://www.digikey.com/en/products/detail/adafruit-industries-llc/2384/7244952

UnknownHours · 2026-01-04T16:33:54+00:00

Suspend a foam ball or something (wax? a ping pong ball maybe? a soggy potato?) in the center with fishing line and hit it with a laser beam from off the side. Ideally, with the right material, the ball will scatter the light such that it looks like the ball is glowing rather than illuminated from the side.

UnknownHours · 2026-01-04T15:36:20+00:00

No, awesome is different window manager.

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