Author Archives: chris

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About chris

Software developer

Honda motorcycle OBD/k-line interface gear indicator

I’m building a gear indicator and information display for my CBR500R. It uses an Arduino Pro Mini, Nokia 5110 display, and hooks in to the Honda diagnostic connector under the seat. Protocol is a custom OBD k-line format. Here is … Continue reading

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Motorcycle Stand

I used FreeCAD to model this simple motorcycle stand before building it. It’s made out of 2×4’s with glue and screws. I think it could easily hold a whole car up.

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FemtoWii

This is a small 25mm by 30mm MultiWii board I started designing a while ago. I haven’t had much time to refine or test it. I did create a prototype board but that’s about it. The intent was to create … Continue reading

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FrSky Taranis

The radio doesn’t sit flat on the bottom when you set it down on a level surface. External TX module pins must be bent to fit modules.

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Blade 130X

Project 130X. Had a Rakon DFC CNC head that was not square from the factory so I pounded on it with a hammer to make it straight.  It appears to be possible to use an S107 tail motor to repair/replace … Continue reading

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mCPX

Bought a cheap mCPX off eBay that had a broken 3-in-1.  Fixed the 3-in-1 and converted to brushless using C05XL and super-FET XP-3A (double FET’s). Main motor PWM signal (from resistor on back of board) is 1kHz.  On the 9x … Continue reading

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HiSKY for 9x

Transmitter project for the HiSKY protocol used with things like the WLToys V922

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V922

See also my HiSKY/HT8 for 9x thread. Attached is my ER9x model for the V922.  I have the HT8 set for Futaba mode.  Note this model has no “beginner” mode or even idle-down (ie. full 3D always).  To fly start … Continue reading

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Skyartec TX module for the 9x

This is a TX module for the 9x that works with Skyartec receivers (eg. Wasp 100 Nano CP, etc). It uses an off-the-shelf generic CC2500 module (eBay/China) and has an integrated LNA that provides 100mW output. The RF module is … Continue reading

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JSON encoder and decoder for Lua

My implementation of JSON using the LPeg library.

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