transistor-man
Re:Camera Chase Vehicle
on Friday July 17, 2026 @02:17PM (#48950469)
I am framing this comment and putting it on my desk
Re:Camera Chase Vehicle
on Friday July 17, 2026 @02:17PM (#48950465)
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.
Re:The Empty Field That Wasn't: GPS Broadcasts a Numbers Station
on Friday June 05, 2026 @11:50AM (#48414200)
This is a fantastic writeup
Re:DARPA exploring growing bio structures of "unprecedented size" in m...
on Tuesday March 04, 2025 @12:55PM (#43257935)
I'm here to welcome the era of bamboo based spaceships
Re:Homemade polarimetric synthetic aperture radar drone
on Sunday February 16, 2025 @09:57PM (#43074549)
Stellar work! This is such a wonderful writeup!
Re:Scanning ultrasound removes amyloid-β, restores memory in Alzheimer...
on Saturday January 11, 2025 @06:51PM (#42669943)
This paper was submitted march 2015, have there been subsequent studies in the last decade?
Re:Show HN: I made Gyroscopic Gyro Sandwiches
on Tuesday December 10, 2024 @02:20PM (#42380364)
This is excellent
Re:Show HN: I made Gyroscopic Gyro Sandwiches
on Tuesday December 10, 2024 @02:14PM (#42380283)
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
Re:Show HN: I made Gyroscopic Gyro Sandwiches
on Tuesday December 10, 2024 @12:09PM (#42378753)
Admittedly this is a play on words, fair point!
Gimbaled Gyro Sandwiches would be a better title
Re:Show HN: I made Gyroscopic Gyro Sandwiches
on Tuesday December 10, 2024 @12:28AM (#42374053)
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.
Show HN: I made Gyroscopic Gyro Sandwiches
https://transistor-man.com/gyroscopic_gyros.html
Have you noticed that a gyro sandwich is only cooked in one axis? What a missed opportunity.The following details an elaborate way to slow cook food, using a handmade contraption. Not only is it tasty, it's mesmerizing. Feel free to copy the design for your own festivities.
Re:Furilabs Linux Phone
on Tuesday October 15, 2024 @01:27PM (#41850870)
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/
Re:1990s Millport CNC Vertical Mill Revival
on Friday June 28, 2024 @04:57PM (#40825231)
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.
Re:Recovering an Agilent 2000A/3000A Oscilloscope with Corrupt Firmwar...
on Wednesday June 19, 2024 @09:36PM (#40734054)
This is an excellent writeup, it's refreshing to see detailed writeups that are quick to load
Re:The intracies of modern camera lens repair
on Monday May 13, 2024 @11:28PM (#40351384)
The intricacies of repairing a modern lens, getting auto focus to work and identifying tiny parts to bring expensive hardware back to life.
The intracies of modern camera lens repair
Repairing camera lens electronics with a flex PCB
Re:Repairing camera lens electronics with a flex PCB
on Tuesday October 24, 2023 @09:31AM (#37998939)
Detailed technical write up about repairing delicate flexible circuit boards and reviving a nice camera lens on a budget
Re:Ask HN: Could you share your personal blog here?
on Wednesday July 05, 2023 @10:16AM (#36600805)
https://transistor-man.com
Some technical projects and adventures ranging from snowy robots to acrylic painting arms and everything in between.
Re:YouTube is testing a more aggressive approach against ad blockers
on Friday June 30, 2023 @01:02PM (#36538445)
What's remarkable is this quote comes from a book written in the 1920's
Re:DIY Adapter: Using an e-bike battery to run a laptop
on Monday May 01, 2023 @01:24AM (#35769376)
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.
Re:DIY Adapter: Using an e-bike battery to run a laptop
on Sunday April 30, 2023 @11:39PM (#35768848)
At 80W, running a laptop, it hovered around 90F, shown here:
https://transistor-man.com/lenovo_ebike_adapter.html#How_doe...
Re:DIY Adapter: Using an e-bike battery to run a laptop
on Sunday April 30, 2023 @09:53PM (#35768343)
This is excellent, wait does this actually work
Re:DIY Adapter: Using an e-bike battery to run a laptop
on Sunday April 30, 2023 @09:48PM (#35768318)
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
Re:DIY Adapter: Using an e-bike battery to run a laptop
on Sunday April 30, 2023 @09:39PM (#35768274)
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.
Re:DIY Adapter: Using an e-bike battery to run a laptop
on Sunday April 30, 2023 @08:12PM (#35767758)
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
DIY Adapter: Using an e-bike battery to run a laptop
Re:DIY Adapter: Using an e-bike battery to run a laptop
on Sunday April 30, 2023 @03:02PM (#35765561)
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.
Re:Ask HN: Share Your Personal Site
on Friday January 06, 2023 @03:14PM (#34280361)
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.