Thursday, January 30, 2014

3D printed LED bracelet. #wearable #neopixel #trinket #3dprinting #3DxJewelry

This project started when I printed Diagrid Bracelet by nervoussystem and got the idea to add some LEDs to it. I may be little obsess withe LEDs at the moment, led-jar, music visualiser.  A trinket is controlling the led strip but any smal microcontroller‎ should do. The bracelet is printed on a Form 1 using withe resin. It is still a work in progress but start to look quite nice.



  • 3D printer
  • Soldering iron




Circuit Diagram

Connect the led stripe to D1 to one of the trinkets pins, I use pin 1, and connect +5v to the battery positiv and GRD to negativ.

First version off electronics
Version 2 has a connector so it can be disconnected from the bracelet


I went through a few different versions.
Version one and two are design using openscad but when I tried to add holes to the design the program crashed after compiling a hour or so. So I tested with rhino for osx , sketchup and ended up using 123D Design.

Version 1-3

Version 2 with electronics
Version 4 I splited up in two parts so it is easier to get it on the wrist and using smal magnets to hold the parts together.

Freshly printed

Magnets glued to the bracelet

Snaps together nicely

Further improvement

Use a 144 LED/m stripe instead for 60 LED/m and add some kind of sensor so it can react to the environment. Should properly try to build in the electronics a little more into the bracelet so it do not get damage by tear and moister.

Happy hacking!

Sunday, January 26, 2014

Simple Electric imp temperature logger with 3d printed case. #IoT #3dPrinting

I build this temperatur logger for my father as a christmas precent so he can use his phone to view the temperature at home. The device is build from a electric imp, TMP102 temperatur sensor, battery and a charger. It loggs the data to thingspeak.


  • Electric imp
  • TMP102
  • lithium battery
  • lithium charger


Connect Pin1 to SCL and Pin2 to SDA



I design the case in sketchup and printed it on a Form 1 3d printer. I hade to go throw two version before getting on that fit everything.
Files can be downloaded on thingivers

For a solar power temperature logger

Happy hacking!

Thursday, January 23, 2014

New tool: Form 1 #3dprinting

A few weeks ago I got my Form 1 3d printer from Formlabs after waiting almost a year.

It was really simpel and fast to get started with the printing. It toke less then 20 min to get started printing.   

First print

I build a temperatur loger for my fader for christmas present that needed a case. Be back for a post about it later.

Case for Electric imp temperature loger 


First prototype off a Led bracelet. Bogg post soon.

Led bracelet

After using it a few weeks now I really like the Form 1 for being simpel, reliable and nice resolution.