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March 28, 2012

Irrigation Controller and Timer

    I've been wanting to grow a garden for almost a year since I moved into the home with this tract of beautiful fertile land. However, considering my busy work schedule, I didn't feel comfortable knowing my poor veggies would be relying on my half-asleep and sometimes late-waking self to provide a proper watering. I started designing a rain water collection and automated irrigation system during the winter of 2011/12.

July 25, 2011

Stillduino v2

    With the acquisition of a new distillation unit, I decided to transfer and adapt the arduino control interface from my previous distillation unit to this one. I wanted a redesign that would reduce size and increase functionality. The 120VAC solid state relays, arduino, and a resistor were the only components that made the cut into the new design. A 16x2 LDC and a rotary encoder with a push button were picked up from Sparkfun for input and feedback. The rotary encoder allows unrestricted rotation as well as having a normally open push button. This, in combination with an LCD, seemed to be the simplest interface with the greatest functionality.

July 11, 2011

Stillduino v1

    I discovered the cheap tabletop distillation unit that I purchased had design flaws beyond the craftsmanship. Further insult was that with the seller's terms of sale, it was mine for good. I had been burned, but that didn't get me down. The flaws were minor, but made proper operation a challenge. A circuit

November 19, 2009

Moto Security

     Building a vehicle security system has been in mind for a while, however, a recent surge in motorcycle thefts from my university has forced me to pick up the pace with development. What this simple circuit does is once the bike's power is turned on from the ignition, a magnet must be waved over a hidden reed switch to activate a latching relay. This latched relay will continuously power the fuel pump until a) the ignition is turned off, b) the engine kill-switch is used, or c) a button on the handlebar is pressed that silently resets the circuit (without killing the engine).