transistor-man

I am framing this comment and putting it on my desk

Thanks for the kind words! Nimbus was a really fun project, just spent a bit re-formatting previous writeups to be more modern-web compliant. The one-wheel was indeed a weirdly synchronous release, I had no idea it would be as wildly successful as it became.

This is a fantastic writeup

I'm here to welcome the era of bamboo based spaceships

Stellar work! This is such a wonderful writeup!

This paper was submitted march 2015, have there been subsequent studies in the last decade?

This is excellent

It does indeed work! I've been meaning to instrument a food stimulant mass to determine how the chaos is effected my mass offset vs speed. I think due to the under-actuated nature of the system you're stuck with a balance between cg-offset, gravity and input rotation on the first axis

Admittedly this is a play on words, fair point! Gimbaled Gyro Sandwiches would be a better title

Have you noticed that a gyro sandwich is only cooked in one axis?

I built a contraption to slow cook in multiple axes and documented it here:

https://transistor-man.com/gyroscopic_gyros.html

Not only is it tasty, it's mesmerizing to watch. Feel free to copy the design for your own festivities.

I'm interested, is there a hands on video or review somewhere?

I can't get their timeline page to load correctly: https://furilabs.com/timeline/

It's always nice to see a detailed write up, a lot of cnc mill repairs end up replacing the existing control hardware but this write up was a curious take on maintaining the existing electronics, which takes more talent than replacing.

This is an excellent writeup, it's refreshing to see detailed writeups that are quick to load

The intricacies of repairing a modern lens, getting auto focus to work and identifying tiny parts to bring expensive hardware back to life.

Detailed technical write up about repairing delicate flexible circuit boards and reviving a nice camera lens on a budget

https://transistor-man.com

Some technical projects and adventures ranging from snowy robots to acrylic painting arms and everything in between.

What's remarkable is this quote comes from a book written in the 1920's

Thanks for the question, I completely missed that part. I'm using a homemade e-bike where the battery is just connected with a standard Anderson connector. A lot of off the shelf battery modules do have proprietary connectors, but a fair number have been documented. The M365 scooter batteries for instance are 36V 9AH and they connect with a hobby XT series connector.

At 80W, running a laptop, it hovered around 90F, shown here: https://transistor-man.com/lenovo_ebike_adapter.html#How_doe...

This is excellent, wait does this actually work

Woah that comment is a call back, thanks for digging it up.

I think one of the major boundary conditions, aside from 25V caps are just thermal. Laptops can't really radiate more than 100W continuously, and 20V at 5A is a fairly happy balance of wire thickness (defined by current rating) and system battery voltage defined by battery chemistry. A 4-cell lithium string tops out at 16v, and a 20v to 16v dc/dc is marginally smaller than a 60v to 16v dc/dc

There's definitely ways to shrink this down and I tried to address that in the initial DC-DC selection. The minimum supply that certain P-Series Lenovos require is 135W, while this module is rated for 150W, it is available surplus for relatively cheap (40$) without requiring building a full enclosure.

Looking forward to taking a second pass at this and shrinking it down.

at the moment it's somewhat smaller than the stock 'brick':

https://transistor-man.com/PhotoSet/lenovo_dc_supply/P113071...

That is so refreshing, yeah the lenovo P series just ignores USB-PD inputs as it nominally wants 135W external power minimum. The kicker is it rarely ever draws more than 90w

I really enjoy working remotely, like properly out in the woods. For whatever reason most of the 'desktop replacement' laptops refuse to use external USB-PD battery banks so I designed a quick in-line adapter around an industrial DC/DC converter. Its fairly quick to assemble and thought this might be of interest to some of you.

Here's me: https://transistor-man.com

I've been using it as a mixed place for documenting engineering projects and hosting piles of images from various reverse engineering efforts & excursions throughout the states.

I've been slowly working on it becoming more mobile friendly. As a static site its incredibly time consuming to cleanup, but also fun. It's like restoring up rusty cookware, similar functionality but way prettier after a lot of scrubbing.

Another great Mosfilm, Kin-Dza-Dza!. Spaceships run on matchsticks while rusty bolts are required for intergalactic travel.

https://www.youtube.com/watch?v=AUtZOl_QxvY

Any chance you're going to release schematics / open source the design?

Awesome project!

This would be fairly great fit for underwater UAV's, or like security camera way out on the edge of property. May be a good idea to post on ardu-sub related discussion forums. I'm not aware of an off the shelf module that's point to point ADSL, almost every modem is intended to yell at a ADSL / ADSL2+ host.

Did you run into any issues with consumer-grade gigabit switches negotiating 10Mbit?

Congratulations Banks and Max, this is excellent!

-Dane

Excellent writeup! Have you ever had any sort of reasonable range with a cybiko? I remember articles noting that connections struggled after 30 meters