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

Reduce Noise in Your Sensor Measurements with an Active Low Pass Filter Part 3

In this three part series we look at how to design a signal conditioning circuit to increase the accuracy and resolution of your ADC sensor measurements. The signal conditioning circuit consists of a double pole active Sallen Key Low Pass Filter and a non-inverting op amp. The filter portion is meant to attenuate high frequency noise from your sensor signal to increase measurement accuracy. The amplifier portion scales the signal up to the full range of the ADC to ensure you are getting max resolution. In part 3 we test our finished LPF + Amp circuit. 

If you are interested in purchasing the circuit from the video go to forcetronics.com

You can access the Eagle files on Github at: https://github.com/ForceTronics/Salle...

Reduce Noise in Your Sensor Measurements with an Active Low Pass Filter Part 1

In this three part series we look at how to design a signal conditioning circuit to increase the accuracy and resolution of your ADC measurements. The signal conditioning circuit consists of a double pole active Sallen Key Low Pass Filter and a non-inverting op amp. The filter portion is meant to attenuate high frequency noise from your sensor signal to increase measurement accuracy. The amplifier portion scales the signal up to the full range of the ADC to ensure you are getting max resolution.

You can find the online filter calculator used in part one at this link: http://sim.okawa-denshi.jp/en/OPseikiLowkeisan.htmk

You can access the LTspice file on Github at: https://github.com/ForceTronics/Sallen-Key-Low-Pass-Filter-Design/tree/master

Sallen-Key Low Pass Filter Circuit with Amplifier Stage in LTspice