My latest blog post: Back 2 Basics - NMOS Switch
https://mikecoats.com/back-2-basics-nmos-switch/
The latest in my 'back to basics' series. Toggle high-ish voltages and currents from a microcontroller using an N-channel enhancement mode Field-Effect Transistor, also known as an NMOS Switch.
My latest blog post: Reverse Engineering a Broken Night Light - Part 1 - Tear Down
https://mikecoats.com/night-light-part-1/
We bought our first Night Light when our daughter was born; within 3 years, it and its replacement had broken. Let's tear it down, reverse-engineer what's left, and build it back up with some extra 'smart' features.
A technological artifact of the 50/60hz split in Japan. The timer will run at a different rate so rather than sell separate models with the timer painted differently, they just have two marks for 50 or 60hz. Beautiful.
#electronics #electricity
Über das verlängerte Wochenende mit #Brückentag gibt es jede Menge Reparatur Cafés. Gerne mal mit einem defekten Gegenstand vorbeischauen!
Ein Reparaturcafé ist eine gute Anlaufstelle um unabhängig Expertise zu euren defekten Geräten zu bekommen.
#Köln #Berlin #Chemnitz #Essen #Darmstadt #Hamburg #Erlangen #Bremen #München #Stuttgart #Jülich #Mannheim #Hirschau #Hannover #Aachen #Bonn #Paderborn #Mainz ... und viele mehr
#Deutschland
https://www.reparatur-initiativen.de/termine
#Österreich
https://reuseaustria.at/repaircafes-und-initiativen/#repaircafeinitiativen
#Schweiz
https://www.repair-cafe.ch/reparieren/reparieren-naechste-cafes/
I'm starting to do the repair in this video:
TDS220
I did a macropad for Linux for myself on the cheap. I use it daily and it is magical!
I just updated the scripts so that it handles plug and unplug and gracefully restarts the service.
https://github.com/poleguy/remap
I also use a work provided huion Kamvas pro 13 for remote whiteboard type engineering work (#krita mostly). Pen works fine but I never bothered configuring the buttons on it.
I built a latency meter with an Arduino and a photo transistor to answer one question: Is click-to-photon latency higher on Wayland than on X11?
And the answer is: Yes, actually.
42 ms on X11, compositing off 56 ms on X11, compositing on 64 ms on Wayland 71 ms on Windows 10
Tested with Plasma 6.3.4 and Firefox 137. I will improve my methods and confirm these numbers. See replies for details.
We. Love. Modular. Ports.
Did you know that MacBooks have modular USB-C ports? All that Thunderbolt speed goes straight through a small press connector. Impressive!
Better yet, if you break a port, your expensive logic board's safe and sound.
Why doesn't every laptop do this?!
—
#repair #electronics #iFixit
@eff
I combined dicewords with PasswordMaker on this @adafruit PyPortal in order to generate random site-domain specific passwords. The Circuit Python script will regenerate the password provided I can remember those 6 randomly selected words. It also acts as a keyboard HID
#MicroPython #electronics
Digging through an old box and found these from back when I'd get any new microcontroller... sigh. Anyone have a use for them?
#microcontroller #electronics #maker
I'm not fully happy with this one yet, but it works and I'm using it. I've been sitting on it for a while now and I need to just publish it because I'm not sure when I'm going to get to the V1.5 improvements I want to do.
Here's my take on a simple fume extractor that uses a couple of easily obtainable and off the shelf parts.
If you're sucking solder fumes and have a printer and about $15 for materials. Here you go: https://www.printables.com/model/1211096-solder-fume-extractor
Libre License, FreeCAD source files included.
I ordered some LED's, sockets, 2n2222 transistors and some 12V relays today.
What do you all think of this plan:
USB->UART (buy it)
UART->LOGIC output (build it: see falstad/video)
LOGIC->RELAY (buy it)
POWER- through relay (spare 12v from shucked HDD's)
Automotive/pinball LED T10 bulbs in sockets mounted to PCB or 3D printed structure. (buy it)
#electronics
#soldering
#microsoft
#MicrosoftTeams
#onair
#onairlight
#dietz
#chrome
#python
#ee
#circuit
#falstad
#LED
#arduino
#raspberrypi
My python code sends data out of the serial port if Teams is On a call and sends nothing otherwise.
The circuit turns the LED red when it sees pulses and leaves it red for a second or so. As long as it gets serial data once a second or so the LED stays on. If anything goes wrong it goes off
Would you buy a serial to on/off GPIO output module like this?
I have an old #Dietz lantern that I was given by my cousin. I'm doing a project to add an on-air light to teams when in a call in Teams. This post is step one.
This has to work without IT permission, so I'm doing it from #chrome using the devtools interface. I'm kinda surprised #Microsoft hasn't tried to block this method.
My colleague also has an on air light, so I'll have two users right off the bat.
https://github.com/poleguy/sweep/blob/master/teams_chrome_status.py
My latest blog post: VanSpoof - Prototype 1 - Hardware
https://mikecoats.com/van-spoof-prototype-1-part-1/
Let's look at building a prototype PCB for my VanSpoof project. I really want to get better at soldering SMD components, so I'm going to try to use as few through-hole parts as I can get away with.
#Eth0 is a DIY high-tech geek conference, aiming toward sharing knowledge on technology and IT related fields including hardware, #electronics, 3D printers, networks, #programming, privacy, ethics and #hacking. By day participants hack away at projects & when the sun goes down it's time for beer, club-mate, games - party or chill out! There's always a ton of techy activities, a loaded-out bar and an abundance of #hackerspace activity. Maybe someone brings along lasers to complete the party!
I'm so proud! #Sennheiser never would have allowed a #garage-built #proton-pack to make it in to their behind-the-scenes video! (That's me starting at 2:36)
https://www.youtube.com/watch?v=tZZmv2LQ-Es
For contrast, don't miss the Sennheiser #Spectera video.
https://www.youtube.com/watch?v=Qvi36Lq4eHc
#Shure #IEM #wireless #electronics #telemetry
I'm doing the next generation protonpack #fpga telemetry system as an #opensource #openhardware design.
Team #mastodon will help me out, right?
V2 of my 1-seg #PCB concept is pretty much ready with through hole pads for adding wires (thanks to @LovesTha for the suggestion), fixed some bugs (thanks to @PossiblyMax for catching) AND added a bunch more pads to open up even more usage options too! /thread #electronics #maker #rgb
My latest blog post: Reverse Engineering a VanMoof e-shifter – Part 2 – Decoding the Signals
https://mikecoats.com/vanmoof-eshifter-reverse-engineering-part-2/
Now we've tapped in to the wiring of a VanMoof e-shifter, let's work out the baud rate and format of the data being transmitted and which format of messages are being exchanged between it and the bike.
x 
