HAL9k hacks: Arduinostyret vindspil som vækkeur
Bastian har en notesbog hvor projekter opstår. En af skitserne er blevet realiseret i form af et Arduino-styret vækkeur i form af et vindspil.
Forfatter Georg
20 feb
Kommentarer lukket til HAL9k hacks: Elektrificering af ladcykel
HAL9k hacks: Elektrificering af ladcykel
Nikolai er i færd med at montere en elmotor på sin ladcykel i HAL9k. Der er lidt der skal mases og bukkes lidt for at det kan lykkedes, men gåpåmodet er der cyklen venter med stor forventning på at blive gjort højteknologisk.
23 jan
Kommentarer lukket til HAL9k hacks: Søren vil styre et kirketårn med ESP32
HAL9k hacks: Søren vil styre et kirketårn med ESP32
HAL9k hacks 2025-01-23. Søren taler med Georg omkring en opdateret kirkeklokkestyring baseret på ESP32. Den gamle Arduino-version skal opdateres 🙂
09 feb
Speaking “Pyt-knap” / “Never mind button”
A woman working in a kindergarten told me about a button they had for the kids. Whenever there was some dispute between some kids, an adult could ask them to press the button, in order to easen the kids ability to act by the meaning of the danish word “pyt” (meaning something along the words “never mind”).
However it turned out turned out the button was not a button after all but just a sticker! I thought the idea behind the so called “button” and the usage of it was fun, so I decided to make one for the kindergarten.
The solution was straight forward: Make a little box with a laser cutter, an isd1820, a button, a dc plug for the case, a lot of hot snot glue and a 5 V power supply. The box is made of 6 mm ply wood and measures 9x9x9 cm. The hole on the back is covered by the back plate where the screw in the wall is screwed in. To finish it all up I gave it two layers of varnish. If you want to build one your self, the OpenSCAD file is available here and an SVG (the green color should only be engraved) is available here (the green color in the SVG should only be engraved).
If I later on get a picture or a small video clip of the button in use in the kindergarten, I will update this post.
02 nov
Solder fume lamp
I needed something to remove the smoke when soldering and build this USB powered solder fume fan lamp with an ESP8266 arduino, WS2812b/Neopixels, a fan with an active coal filter and a PIR sensor.
See a short demo of the lamp on Youtube.
Scad/svg files are available on Thingiverse.
The case is lasercutted in 4 mm plywood.
When there is no movement beneath the lamp the fan turns off after e.g. 60 seconds (can be extended to e.g. 1800 when holding down the fan button) and the LED turns off after 1800 seconds of inactivity. The LED intensity can be dimmed by holding down the LED button.
Parts list:
* 4 mm plywood for the laser cutted case
* Ikea Forså lamp ( http://www.ikea.com/us/en/catalog/products/80146777/ )
* WS2812b / Neopixel strip (30 LED/m, 12 LED’s are used for the lamp. I bought it on Ali Express)
* Level shifter from 3.3 V to 5 V for the 3.3 V output from the PIR sensor (https://www.adafruit.com/product/757 I bougt it on AliExpress)
* 1.5 mF capacitor betwen +5 V and ground near the Neopixels, for evening out voltage drops and ripple from the USB power.
* PIR sensor (https://www.adafruit.com/product/189 I bought it on AliExpress)
* Fan (80 mm, 12 V. It was just laying around)
* Wemos D1 mini (https://www.wemos.cc/product/d1-mini.html)
* Wemos ProtoBoard (https://www.wemos.cc/product/protoboard.html)
* Wemos RelayShield for turning the fan on and off (https://www.wemos.cc/product/relay-shield.html)
* MT3608 DC-DC Step Up Power Module from AliE for the power for the 12 V fan
* Activated coal filter (adjusted the size with a scissor) (https://www.conrad.de/de/aktivkohlefilter-3teilig-toolcraft-79-7201-588546.html i bought it on AliE)
* two push buttons, connecting the pins from the ESP8266 to ground.
* USB cable
* A few strips, pig tail wires, bolt and nuts etc.
The case is glued together with normal wood glue and the PIR sensor and the WS2812b Neopixel strips are glued against the case with cyanoacrylate. The DC-DC converter is fixed with a cable tie. The Wemos D1 mini is fixed with a small bolt through a drilled hole in the ProtoBoard. The capacitor and the level shifter is glued with a hot glue gun. Be aware that there is very little room for the boards and the wires. If I were to build it again I would make some more room. Also the “stack” of the Wemos ProtoBoard, D1 mini and RelayShield is higher than the fan + activated coal filter, so it sticks out of the top, which I think is fine. All the parts do not need to be hidden away for the eye to see 
The software is available at:
https://github.com/sman-dk/arduino/tree/master/solder_fume_lamp
Since the ESP8266/Wemos D1 mini has wifi it can be made controllable via your smartphone etc. At the time of this writing I have no use of this, so for now I have not implemented anything fancy yet
Tilfældige indlæg
27 feb
Kommentarer lukket til HAL9k hacks: Arduinostyret vindspil som vækkeur