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.
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’.
This tutorial demonstrates how to measure voltage across a potentiometer. The concepts explained in this tutorial can be used to create position feedback sensors and contrast/brightness control for Liquid Crystal Displays. Check out the tutorial for full details.
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.
I’m pretty sure the majority of my projects will never be considered “Complete” as I’m always tinkering with the firmware to add or refine features. However, I like to give my projects a finished look which means they will be inside of enclosures or integrated into other devices. It would be nice if I could update the firmware without having to dissect the project to get at the controller. To accomplish this, I created a XBee plug for my Hobbyduino Mini V3 Arduino clone. Check out the gallery here and the tutorial here.
This tutorial demonstrates uploading sketches to an Arduino over a wireless connection. I designed a couple of XBee adapter boards for my Hobbyduino V3 (Arduino clone). These adapters made it easy to properly configure each of the XBee Series 1 modems used in the tutorial. Check out the tutorial for full details.
I’ll soon be updating the Hobbyduino Mini to the Optiboot boot-loader. According to the Optiboot Google Code Page:
- Allows larger sketches.
- Is a quarter of the size of the default bootloader freeing 1.5k of extra space.
- Sketches upload faster.
- Optiboot operates at higher baud rates and has streamlined programming.
- Adaboot performance improvements.
- Runs sketches sooner with no watchdog issues.
- Compatible with 168 and 328 Arduinos.