I designed a breakout board for the Sensirion SHT1x Humidity and Temperature Sensors. The SHT1x family of sensors can measure relative humidity, temperature Celsius and temperature Fahrenheit. My plans are to use the design for various heating and control projects such as a wireless thermostat, greenhouse controller and some environmental projects. The project link details a SHT15 but, any of the sensors that share a common footprint can be used with the breakout board. I also developed (modified) an Arduino library for use with the Sensirion sensors. Check out the project here.
I designed a breakout board for the MAX6675 Cold-Junction Compensated Type-K Thermocouple interface. My plans are to use the design for various heating control projects such as a Sous-vide cooker, wireless thermostat, smoker controller, beer brew controller, reflow oven and some environmental projects. Check it out here.
I updated the CNZ1120 Photo Interrupter board to version 2.0. The new board is smaller and uses SMD components (only two resistors). Check it out here.
I designed a basic motor controller that is robust, cost effective and able to handle high current. I wanted to take advantage of Pulse Width Modulation (PWM) to allow speed control but keep direction control as simple as possible. Thus, I use a pair of SPDT relays for direction and a single MOSFET for PWM. I also use optoisolation to separate digital logic from the back EMF of the motor and relay coils. Go here to see it.
I developed the prototype plug to further extend the mounting options for the Hobbyduino. A breadboard can be mounted for prototyping or components can be soldered onto the board. Go here to see it.
More mounting options! I have developed a prototype shield in my pursuit to make it easier to use the Hobbyduino. This shield allows a breadboard to be mounted on it for prototyping circuits. It also has a circuit layout in reference to a breadboard that allows for permanent mounted circuits. Go here to see it.