Projects – Hobbybotics SHT1x Humidity/Temperature Breakout V1.0

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.

Projects – Hobbybotics MAX6675 Thermocouple Breakout V1.0

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.

General – Optiboot 4.4

Been a long time coming but, today I officially updated all of the Hobbyduino boards to Optiboot 4.4 (same bootloader that is on the Uno).  I’ll follow this post up shortly with a tutorial on how I did it.  For those that cannot wait, you can take a look at my introduction for the Hobbyduino Mini Bootloader ISP Shield.  The process to load Optiboot is pretty much the same as that for the Arduino Duemilanove w/ ATmega 328 bootloader except the board type is now ‘Arduino Uno’.

Tutorial – Use a Light Dependent Resistor (LDR) to Measure Light Levels

This tutorial demonstrates using a Light Dependent Resistor (LDR) to vary the blink rate of a LED based on the level of light striking the LDR.  This tutorial covers some basic concepts that can be used to develop home automation applications such as automatic light dimmers, automatic blinds or curtains and a automatic night-light.  Check out the tutorial for full details.