{"id":162,"date":"2016-12-16T18:47:32","date_gmt":"2016-12-16T23:47:32","guid":{"rendered":"http:\/\/jbkuma.com\/workshoppe\/?p=162"},"modified":"2017-01-15T10:57:18","modified_gmt":"2017-01-15T15:57:18","slug":"r2ino","status":"publish","type":"post","link":"https:\/\/jbkuma.com\/workshoppe\/162\/r2ino\/","title":{"rendered":"R2ino"},"content":{"rendered":"

R2ino is an Arduino based partner board for the Plecter Labs Nano Biscotte v3 first installed in my Pathfinder hilt.\u00a0 The setup consists of a Nano Biscotte<\/span> V3, Arduino Pro Mini 3.3v, several WS2811\/WS2812 LEDs and chips, a charge port with a leave-in kill key, 3.7v 18650, and aviation\/CB style 8 pin connector.\u00a0 The harness is an FTDI board (since the mini doesn’t have USB), another set of 8-pin connectors, and a tactile switch which mirrors the main button on the hilt.\u00a0 The shunt is just an 8-pin connector wired to pass the signal to the bits that aren’t removable.<\/p>\n

I refer to the sections as the Ignition Core, the Power\/Logic Core, programming shunt, and programming harness.<\/p>\n

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\nHere’s a pretty decent representation of my wiring and nearly completed wiring on a breadboard, exclusive of resistors on the blade LED. There are also some resistors on the Arduino to build a voltage divider so I can measure the battery level.\u00a0 There are 2 main disconnects, one between the ignition section and the logic section, and the other is an external port for serial interface to the Arduino.\u00a0 At the moment serial interface allows me to adjust LED color, stability effects, and brightness, and check battery levels with my phone or computer, as well as reprogram the Arduino.\u00a0 The programming is mostly (but never really) complete.<\/p>\n

As you can see from the diagram, the Pro Mini is inter connected with the NB.\u00a0 The main LED and FOC pads are wired to digital inputs and are set to operate as instant on\/off.\u00a0 I ended up disconnecting the sleep pad because it was causing sound issues on startup (if anyone knows how I can fix that I’d be happy to hear it!).\u00a0 All of the LEDs, including the blade RGrB Cree, are controlled via the NeoPixel library.\u00a0 The blade LED is controlled by a WS2811 chip and TIP42Cs, could have done it via PWM I suppose, but since everything else was going to be NeoPixels there was no reason to rewrite the book for that.<\/p>\n

Using the 8-pin connectors I’m able to remove the Power\/Logic Core with worrying about any of my connections breaking.\u00a0 The shunt is only really required if I want to play with the blade or button accent color without guessing, otherwise I just plug the harness into the Power\/Logic Core itself.\u00a0 The harness can be plugged into anything that can provide a serial terminal.<\/p>\n

Future development plans include making a GUI interface either via an app (probably sexier), or another Arduino with a screen (probably easier).\u00a0 I have some code in the works already that uses a screen and Arduinos paired over serial, so that will probably happen first (if the app ever happens at all).<\/p>\n

The video isn’t the greatest, but it’s done.. so without further ado:
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