Designing a Thermocouple Temperature Measurement Circuit Part 2

In this series we look at how to design a Thermocouple temperature measurement circuit. In part 2 we look at a real world example of a Thermocouple J Type circuit design and discuss some of the common sources of error and how to avoid them.

Ground Considerations for PCB Layout of Mixed Signal Designs Part 2

In this video series we look at considerations when laying out a ground plane on a PCB when working with a mixed signal designs. If you want to ensure you are making accurate noise free ADC measurements in your design this video series is a must watch.

Reference material:
Partitioning and Layout of a Mixed-Signal PCB http://www.hottconsultants.com/pdf_files/june2001pcd_mixedsignal.pdf

Grounding in mixed-signal systems demystified, Part 1 and 2
http://www.ti.com/lit/an/slyt499/slyt499.pdf
http://www.ti.com/lit/an/slyt512/slyt512.pdf

Ground Considerations for PCB Layout of Mixed Signal Designs Part 1

In this video we look at considerations when laying out a ground plane on a PCB when working with a mixed signal designs. If you want to ensure you are making accurate noise free ADC measurements in your design this video series is a must watch.

Partitioning and Layout of a Mixed-Signal PCB http://www.hottconsultants.com/pdf_files/june2001pcd_mixedsignal.pdf

Contracting and Consulting Services for Open Source Hardware Design

This video provides an overview of ForceTronics LLC's contracting and consulting services. Whether you are a maker, entrepreneur, or a startup Forcetronics Contracting and Consulting Services can help turn your idea into reality leveraging the power of open source hardware.

If you are interested contact me on twitter or email:

• Twitter: @ForceTronics
• Email: forcetronics@gmail.com

Put “Contracting Services” or “Consulting Services” in the subject line

Building Your Own AVR / Arduino Internet of Things (IoT) Development Board Part 4

This is part 4 in a 5 part series where we build our own AVR / Arduino Internet of Things (IoT) development board, yay! In this part we will do the PCB layout and discuss how to get our PCB manufactured.

Download Eagle Files

https://www.dropbox.com/s/r1t2mjy1rt29wup/AVR_IoT_Board_Eagle_Files_8_8_15.zip?dl=0

Eagle Parts and Libraries
Libraries Used:
•Atmega 328P --> Library: SparkFun-DigitalIC Device: ATMEGA328P_PDIP
•LM317 --> Library: linear>*317 Device:317T
•Resonator ZTT16.0MHz --> Library: Adafruit Device: CERMOSCILL-THM (CERMOSCILL)
•Ceramic Cap --> Library: rcl > C-EU Device: C-EU050-030X075
•Electrolytic cap --> Library: rcl > CPOL-EU Device: CPOL-EUE2.5-6
•Resistor --> Library: resistor Device: R-EU_0207/10 (R-EU_) Package: 0207/10
•Reset switch --> Library: switch-omron Device: 10-XX
•LED --> Library: led Device: LED5MM (LED)
•Potentiometer --> Library: rcl > R-TRIMM Device: R-TRIMMT93YA
Note: Sparkfun and Adafruit libraries did not come with Eagle, but you can find them on their websites

Parts I made (included in files linked to my blog):
•ForceTronic.lbr --> All header and pin holes and 2.1mm DC Jack
•BLE_Micro_Module.lbr --> BLE Micro

Building Your Own AVR / Arduino Internet of Things (IoT) Development Board Part 1

In this 5 part video series we will build our own AVR / Arduino Internet of Things (IoT) development board. We will go from a design concept to prototyping our design to PCB layout of our design all the way to a tested and finished development board.

Example parts order for this project (please note that this does not include all the parts)