Very bright LED party favor, built with the cheapest CR2032 batteries and LEDs from Asian Ebay sellers.

For testing the MKL04 chip used on DIY Teensy boards…

TODO: Bill of Materials

For testing “QVGA” TFT displays

http://www.pjrc.com/store/display_ili9341_touch.html

Parts used on the board are:

   1    LM7805 voltage regulator        Digikey LM7805ACT-ND
   1    B130 Schottky diode             Digikey B130-FDICT-ND
   1    140 mA PTC fuse                 Digikey 507-1495-1-ND
   1    100 ohm 1/4 watt resistor       Digikey 100XBK-ND
   2    10K ohm 1/4 watt resistor       Digikey 10.0KXBK-ND
   1    DC power jack                   Mouser 163-7620E-E
   1    0.1uF capacitor                 Digikey BC1084CT-ND

How to use Digikey’s website to find alternate parts when any of these aren’t in stock.

This little board receives 3 channels of LED data and retransmits to 3 DMX lighting output with RS485 signal levels.

Code on Github

Here’s a video of it running at Burning Man 2015:

More videos on YouTube:

https://www.youtube.com/playlist?list=PLhXENA7JeFnRI4t-Lm9I9qTDj9zFWdtvh

Ever built a quick demo on a breadboard that needed a pot to adjust some parameter? As soon as someone tries to turn it, things come loose. That is, if they even try… little trim pots aren’t very inviting to touch & turn.

More details about this PCB are available at this blog article.

This pot adaptor board lets you use real full size (6mm shaft) pots on breadboards. With 10 header pins, the pot mounts securely to the breadboard, even when people turn the knob!

The pot in these photos is Digikey # PTV09A-4020U-B103-ND.