New blog post! PWM & Visual Brightness. Finally I have turned my ideas into a script, so I never have to break my brain about this again.

TL;DR: visually linear + good control over low brightness

stuvel.eu/post/2020-12-02-pwm-

I want a few of those for my electronics projects!


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RT @samerps
Power Inductor! DecalMachine + Chipp Eevee materials, fantastic addons @machin3io @chippwalters
twitter.com/samerps/status/129

I built an amplifier! This little fella is going to replace the big old amp that I use to hear my electric drumkit. Check out my latest blog post with photos, circuit diagram, and a tiny bit of explanation.

stuvel.eu/post/2020-07-06-simp

Much improvement to my homemade thermometer! I used some old B&W film to improve the contrast of the display, and enable the LEDs per digit (instead of per segment) to have more on-time and thus more brightness.

Making my own PCBs is so fulfilling. This is an experiment board to try out the ATtiny84 microprocessor. It's going to connect to USB as well, but as you can see it needs a few components. They should be delivered this week :)

My home made thermometer is working! I designed the whole thing, and made the PCB myself.

Who knows of a way to make the display more readable? As you can see, the "dark" segments are still pretty light.

My UV Exposure Timer is working! This is another step in making my PCB factory more streamlined.

No more timing by hand, this is just a click of a button and I can forget about it until the buzzer sounds.

Open Source, of course! gitlab.com/dr.sybren/atmega168

I made a thing! This is a LED dimmer as well as a speed controller for a smoke extraction fan. Going to make my soldering life a bit nicer. And healthier.

My remote is finished! Plug & play on my Raspberry Pi running @KodiTV@twitter.com + @LibreELEC@twitter.com.

Now all that's needed is a cat guard 😻

My prototype remote control for @KodiTV@twitter.com +@LibreELEC@twitter.com is working! Just one evening coding, was quite easy thanks to the LUFA library.

Now we're going to use this prototype for a while to see which keys we're still missing. Then I'll make a dedicated PCB.

It's working!
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RT @sastuvel@twitter.activitypub.actor
My PCB creation process is working rather well. Some day I might make a how-to video about this.

t.co/S4FWhzsOjp
twitter.com/sastuvel/status/12

My PCB creation process is working rather well. Some day I might make a how-to video about this.

My PCB exposure box is starting to become reality. Here are 234 UV LEDs for exposing the bottom side of the PCB. Another one like this will expose the top side.

My own Arduino-like thingy is working!
With an unexpected cameo 😻

I'm now also programming it without Arduino library, just AVR-GCC.

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RT @sastuvel@twitter.com
Here's the finished device! My first ATmega168p project 😁

twitter.com/sastuvel/status/11 t.co/U44Ks89rhL
twitter.com/sastuvel/status/11

Here's the finished device! My first ATmega168p project 😁


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RT @sastuvel@twitter.com
A new printed circuit board in the making. This will be my own Arduino-like thingy, based on the Atmel ATmega168p chip. I want to have precise timing, so it'll have an 18.432 MHz quartz oscillator.

t.co/1nRkdhlIAh
twitter.com/sastuvel/status/11

A new printed circuit board in the making. This will be my own Arduino-like thingy, based on the Atmel ATmega168p chip. I want to have precise timing, so it'll have an 18.432 MHz quartz oscillator.

It's working! Check out this video :)

youtube.com/watch?v=1JVtGqv783
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RT @sastuvel@twitter.com
My first self-soldered microprocessor (an ATtiny85) project. It's going to control some RGB LED-strips in our kitchen!

It'll do interpolation in HSV space, then convert to RGB for the LEDs. Colours picked using a colour ramp, of course!


twitter.com/sastuvel/status/11

There we go, it's all wrapped up in a CC-BY-SA project on gitlab.com/dr.sybren/keukenlic. Includes the schematic, the PCB layout, and the software running on the microprocessor.


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RT @sastuvel@twitter.com
My first self-soldered microprocessor (an ATtiny85) project. It's going to control some RGB LED-strips in our kitchen!

It'll do interpolation in HSV space, then convert to RGB fo…
twitter.com/sastuvel/status/11

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