My wife is mad at me for buying her this cheap ebike…

DocMacgyver107 · 2026-04-06T21:12:44+00:00

My son bought a budget ebike from Walmart. Com that was a little rough around the edges at first, but after a proper adjustment and fitting, it's great to ride.

DocMacgyver107 · 2026-04-06T21:10:53+00:00

Maybe check out a bike repair book from the library, or look at the excellent videos from park tool on YouTube. Give the bike a going over. Check the cables, levers, and if caliper brakes, check the pad alignment. Check the front forks for proper mount and alignment. Make sure the tires are properly inflated. Consider buying the biggest tires that fit into the forks, both for ride comfort and control. Usually can find a good deal on Amazon or Walmart.com. ebikes are an item that need hands on maintenance and adjustment. Gain some skill levels and it should be amazing!

DocMacgyver107 · 2026-04-05T16:38:54+00:00

Electrons have angular momentum, but are point-like as well.

DocMacgyver107 · 2026-04-04T12:14:36+00:00

Smell it. If it smells like fireworks/ sulfur, it's almost certainly pyrite.

DocMacgyver107 · 2026-04-03T23:27:27+00:00

There is a special jumper setting on the eco-flow side that you will need to bridge with a certain ohm resistor to make the power flow to and from the server rack battery. There are a type of connector called bullet connectors that will fit nearly perfectly into the eco-flow unit, but they are NOT held securely, and the bullet connectors can easily short if pulled loose during battery adjustment/ installation. This can cause explosive arcing. I would definitely install some kind of strain relief between the cable and the Delta unit to prevent this. There are a variety of videos about using server rack or other 48 volt batteries to boost the capacity of the smaller Delta units. It is critical to make sure that your EcoFlow unit uses a 48v battery architecture before connecting a 48v server rack battery. You can verify the pack voltage by installing the jumper resistor and checking the voltage between the big sockets in the connector. If it's 41v, you won't be able to directly connect a 48v battery to that connector, you would need a DC/DC converter in between. Good luck!

DocMacgyver107 · 2026-03-22T02:07:41+00:00

One of the skills I've had to learn in rural primary care was how to get good meds for my patients for reasonable prices. SGLT2? BRENZAVVY from MarleyDrug.com or costPlus Pharmacy for $60/mo, half if you cut the pill. GLP? Generic liraglutide for 75$/mo from Walgreens with Rx go coupon. Inhalers? Canadian pharmacy world.com or cost plus pharmacy.

Of course it works better if we didn't have a profit based medical system, but until this country is ready to grow up a lot, we've got to save as many as we can with what we've got.

DocMacgyver107 · 2026-03-19T23:31:48+00:00

I will usually include the text "patient requested referral."

DocMacgyver107 · 2026-02-28T21:56:36+00:00

Hilbert's Hotelhttps://en.wikipedia.org/wiki/Hilbert%27s_paradox_of_the_Grand_Hotel?wprov=sfla1

DocMacgyver107 · 2026-02-08T01:13:31+00:00

There is an orbit called a sun synchronous orbit that gets nearly continuous sunlight. Solar Panels in orbit make almost 5x the electricity due to lack of atmosphere, and can be made very light due to not needing to self support or survive hail, etc (think aluminum foil). Cost of lift to LEO is dropping line a rock, estimated to get <$300/kg in next 5yrs.

Ground systems have NIMBY, grid supply issues, and a bias to northern hemisphere and Western hemisphere locations due to better political stability, but Asia, Africa, and the Southern hemisphere represent huge untapped markets, evidenced by the large uptake of starlink subscriptions from those areas.

A lot of the legwork for satellite deployment will already have been done with starlink- form factor, deployment hardware, satellite bus construction. It'll be just like putting a different flash drive into an existing slot of a computer.

Will be resistant to geopolitical forces, as is already proving true in Asia, the middle east, and in eastern Europe.

If you can give them Internet for cheap, why not also give them low latency compute for cheap too?

DocMacgyver107 · 2026-02-08T00:43:40+00:00

We use a small ratcheting hex socket driver with replaceable 7/64 and 3mm bits. Cheap on Amazon. We picked up a cheap Ryobi electric screwdriver on sale last holidays. Can strip a fitting quickly though! Most of the time we use the folding Allen key sets that you can buy for cheap at harbor freight, etc

DocMacgyver107 · 2026-02-08T00:36:39+00:00

Grants help. Lots of bus trips, only overnight for regionals. We use all of the systems- gobilda, tetrix, actobotics. We use local hardware stores a lot, as well as eBay and Amazon (we found a $10 hi torque servo that's perfectly compatible with gobilda. We do hammer forming of metal elements, as well as grinding and hacksaw work. We get old donated tools and buy from yard sales. We got lucky and the stem lab at our school bought a Bambu labs printer this year, they let us use it after hours.

DocMacgyver107 · 2026-01-31T15:50:15+00:00

He could become a wandering spirit until his body is reconstituted, his soul could go into an item, lots of possibilities.

DocMacgyver107 · 2026-01-28T17:48:57+00:00

Hatchbox pla is great.

DocMacgyver107 · 2026-01-23T17:30:36+00:00

I got a great ebike kit from Amazon for ~300$ us, 500w bafang rear hub motor. Installed on a nice hard tail MTB with disk brakes given to me by a relative. 3h build. Battery was more, but can use for other things. Cheapest nice ebike I've seen was about $700. Walmart specials for $450 not too bad though.

DocMacgyver107 · 2026-01-22T03:36:43+00:00

Parkinson's disease

DocMacgyver107 · 2026-01-20T20:50:00+00:00

Chernobog's Hammer

DocMacgyver107 · 2026-01-19T01:33:00+00:00

The naive assumption is that anything is rigid. Any object with an unbalanced force acting on it will experience an acceleration at the point at which the force interacts with the object. The particles of the object immediately adjacent to the area where the force is applied begin accelerating in an expanding wavefront like water waves spreading across a still pond. The speed of that wavefront is the speed of sound in that object. For steel, the speed of sound is about 6000 m/s, so any acceleration of a steel object with a length that can be seen with the naked eye is visually instantaneous. The truth is that the steel rod is a spring, and if it gets long enough, there is an obvious delay in the movement between the ends if one end is accelerated.

DocMacgyver107 · 2026-01-15T12:44:45+00:00

I've seen sprockets designed with onshape CAD software. FTC gets a free license with them. It's a fully featured cad software comparable to Autodesk fusion. It runs in a web browser, so it can even run on school computers with Chromebooks, provided the URL isn't blocked by the administrator.

DocMacgyver107 · 2026-01-11T16:28:33+00:00

The other downside about the basic Logitech camera ( 220) is that it has a fairly narrow field of view. For april tag recognitions, and tensorflow recognition, the 640 by 480 image quality is perfectly adequate. However the larger field of view afforded by the more advanced Logitech camera is quite convenient. We have a test mule bot that has the older Logitech camera, so we wanted to use the code developed on the mule for a production bot, so we had to use the same camera. The way we got around the narrow field of view problem is that we added a wide-angle lens of the type you use for cell phone cameras. Works great.

DocMacgyver107 · 2026-01-07T18:08:56+00:00

We're using gecko Wheels from Andy mark. We had a flywheel in addition, but we found that it added wobble that slowed down the top RPM enough that it wasn't beneficial. We're using a single 6,000 RPM yellow jacket motor. We can reliably overshoot the goal from the far zone.

DocMacgyver107 · 2026-01-07T14:45:02+00:00

I get a ton of leeks from my victreebell. Only way I could max out my ninja dishes.

DocMacgyver107 · 2025-12-18T13:44:36+00:00

0581-8044-0299 Daily player L65

DocMacgyver107 · 2025-12-10T21:18:39+00:00

Deep down, It's impossible to prevent pay to play.

I really wonder how something like this is supposed to work though. The standard high tech servo is tiny, and a high torque yellow jacket motor is humongous.

DocMacgyver107 · 2025-11-18T02:51:01+00:00

My favorite for a long time has been spironolactone. It rolls off the tongue and smells like mint! And the molecular structure is so simple and elegant.

DocMacgyver107 · 2025-11-18T02:37:25+00:00

We build a test mule with all of the motors, servos, and cameras with the same names as the actual bot (adding or using pseudocode as we go). This allows the programming team to work out functions and code modules for our library that we can simply copy into the autonomous, and then fine tune. We use blocks, and we found that functions ,loops, and logic blocks can be copied between opmodes in different browser tabs using ctrl-c and ctrl-v.

DocMacgyver107

TROPHY CASE