But the phosphor is still ok (aside from the mercury contamination) we just need to stuff some uv LEDs in there and it's good again...

which is the same as running it push-pull like this, on 6V batteries.

MATH: The core pulls ~31mA when run push-pull with 2.5V across 10 windings at 20kHz. so About the same when run push-pull with 6V at 40kHz

ok, I have selected a core for my robot power supply.... (the dark seeking robot, number 2 of the 52 robots of 2026)

:P

This keyboard is actually an entire computer. Just plug it into a monitor and you’re set.

ArduinoIDEがまた立ち上がらなくなる。 私の場合、Arduinoの標準ワークスペースではない場所にプログラムをセーブしている。 どうも起動時に前回最後に終了したファイルを開こうとしているようで、外部ディスクだからなのか階層で日本語のフォルダがあるからなのか開けないままになっているようだ。

Working on porting Micropolis (SimCity) to the Gameboy Advance. Pictured on a DSi, it is running in GBA mode. Source: github.com/TaraHoleInIt... All it does now is run without sprites and you can scroll around.

Check it out, I now have two #arduino LED pals and they like to dance together 👯‍♂️

My LED children now have more space to play. #arduino

robot of week number 2 of 2026: a dark seeking robot. [power converter, motor drivers, microcontroller (?)]

This weeks social media challenge! Make a post a video of you crimping a dupont end! (the stupid thing fell out on me there...) Got a special technique?

ok, I finally got a pop bottle. uh, could the person I'm helping make a pneumatic water dispenser with this please raise their hand? I kinda forgot who and which platform you were on...

52 bots in 52 weeks? ok, but they aint gonna be pretty! 🤣 I have made so many line following bots that worked better than this...

Yea that 3d print is gonna take 8 hours cause of some bad setting choices, so I have lots of time for the pcb. sorry no finished robot tonight!..

ok, I figured out an upper frame and am printing, while it does that I will solder the electronics up.

so, for at least 1 week this year, I want to build a robot/week. I have grabbed one of the unfinished robot frames, built a line sensor and am now working on power and control...

Crash tour of Rues shop! No guide, your on your own :]

lien following sensor mounted and working, can I get this working for the first of 52 robots in 2026? (I should give up on everything if I cant)

so I built a line following sensor yesterday, new technique... I have some of the floor sweeper robot frames I should be able to use it with.

new years target to build a robot a week for a year? HMMMM...

This is really cool. Worth a watch,

Morning random image: 2021: discrete RC servo controller.

"Not NOW mom, I'm building the internet!" "You're always building the internet, come get supper!"

ok, the answer is multidimensional The highest frequency to bump the output shaft is about 25Hz The highest frequency to bump the motor is about 440Hz ;] The testing almost melted the motor, driver, AND power supply. (unrelated but I did blow up a capacitor)

I have assembled a quick motor driver to do a test and find out what I would have to bring the PWM frequency of the balancing robot down to for each cycle to *slightly* bump the gearbox. This would prevent the 'sticktion' that makes its movement jerky.

Morning random image! 2025: checking code to read a joystick for building a robot remote! ah yea, 2025, I remember it like it was yesterday.

ok quick stupid newyears gag, dont say I didn't do one too! 🥲 It was only like 18 takes, I kept releasing the data bit too soon...

your uptime is 213 days and you want to try a hardware upgrade, what do you do? - wait for a LONG power failure - segfault by leaving chromium running for like 4 days in a row. ... lose the uptime?

as a matter of fact....

Here's one for you....

arg, forgot morning random image

To correct for whatever velocity a balancing robot is at when doing a balance correction, it is necessary to add the corrective drive to the motor control signal. But if you just dial up the integrator to outpace the acceleration from gravity, that works too >Ki dialed to 120!<

This is a penta-wound 5 phase motor. it takes 10 transistors to drive (5 totem poles) The chip on top of it is a 16 channel pwm generator. I have a lot of them! (about 4500) }:]

Morning random image: 2017: I tried giving up and using a china power supply pcb for making a new bench power supply, but it only lived about 5 minutes into the abuse-test :( have not gone back to try to fix it up. (this was supposed to be the easy solution)

256 RGB leds per board, and I refrained to only get about 120 boards.

I got a few of the RGB LEDS off one of the boards, (not all 256, and some ended up on the floor) they look good! I also got a few of the TLC5934 and the CPLD.

🤔 each of the led panels has 256 RGB leds, and I have about 120 panels... 30000 RGB leds.... *blink*

datasheet for L5973 WHAT!?!?!

ooo the modules on these take in nom 12V (8-15) and output ~1-5 (configurable) at 16A!!!!!

omg and look look, look at all the TLC5940!!!!! I will never need a pwm chip again... I should make boards for these...

Sadly the signal distribution boards are conformal coated, those ram chips might still be worth it...

The power supplies are 12V... 84A I have more than 10 of them...

Its from a jumbotron... Each of these display modules has an ispMACH LC4064...

ok, so, a *thing* happened this morning, but, let me explain...

:] upgraded version doesn't slip

alt text: Still glistening in the daylight on concrete table the semi failure of a attempt to DIY a cast aluminum project box sits cooling on a table, innocently resting but fatally hot to the touch. Its form disfigured by its sprews, risers and runners. Sand still clinging to its warted surfaces.

From 2024 One day I WILL MASTER the cast aluminum project box.

morning random image (ignore the clock) 2023, my constant current load bank!

OOOo, upping the Low Pass Filter to 98Hz helped a lot. I could go higher, not sure if I should, there are a lot of things I want to inspect carefully. (in the code). I want to do away with IMU interrupt line.