Projects – Hobbybotics Reflow Controller Quad V1.0

Here’s a quick update to the new reflow controller project I introduced earlier.  I have fully populated one of the prototype boards and began to write test sketches to ensure it functions properly.  The project is moving a little slower right now as I am in the process of closing on a new house and that has been taking up a lot of my time.

2013-03-06 02.44.49_1024x768 2013-03-06 02.44.40_1024x768 2013-03-06 02.44.15_1024x768

The last picture shows an early prototype for the LCD/Button interface for the controller.  I am in the process of redesigning the LCD/Button interface to use a 4-way rotary navigation switch with a center select button.  I borrowed this idea from the Viki LCD project over on Kick Starter.  I’ll post more updates in the coming weeks.

Projects – Hobbybotics Reflow Controller Quad V1.0

I’ve been working on a redesign of the original reflow controller.  Here are the features for the new board:

  1. Four MAX31855 Type-K Thermocouple interfaces
  2. DS3234 Real Time Clock with battery backup
  3. FT231x USB
  4. XBee or Bluetooth Wireless
  5. MCP23008 I/O Expanders for 2-wire expanded communication
  6. ULN2803 Darlington buffered output relay/SSR control
  7. Internal or external micro SD interface
  8. External LCD I2C interface/input
  9. ATMega 1284P TQFP AVR with Arduino bootloader
  10. 16 MHz Crystal

Take a look at the new board:

2013-02-19 01.32.48_1024x768

2013-02-19 01.36.35_1024x768


 I’ll post more on this project in the coming days.  I’ll be offering this project as a full kit for those who are interested.

Project – Internet Enabled Multi-zone Thermostat (DesignSpark Challenge Entry)

I’m currently working on documenting this project but, here is a link to my entry for the DesignSpark Challenge. The competition has already been decided and my entry garnered an honorable mention award! This was the first competition that I entered and to win an honorable mention out of over 1000 entrants means a lot to me. I also won a Community Choice Award during the competition for the most popular project. I have to say this was a difficult competition as there was a lot of requirements. For instance, I had to learn how to use DesignSpark PCB as it was required to produce an extension board for the ChipKit Max32. I had to learn the ins and outs of the Max32 as it is/was not entirely compatible with all of the Arduino libraries. This meant some modifications to libaries in order to make them compatible with the Max32. Lastly, there was a long wait for the PCBs to be shipped from China which meant any mistakes in the board files meant lost development time (I made a few mistakes). Time management was definitely crucial in this competition and I ran all the way until the last few minutes for project completion trying to get everything together. A few mistakes kept me from adding all of the software features that I had intended but, I have pretty much completed them since the competition. Check out my entry here and be on the look out for full documentation on my blog to include some extension projects (There’s a lot of goodies in this design that can be carried over into other projects).

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.