Building a 10 volt reference using some vintage AD584 IC’s from 1983.
An updated version of the
Voltage Reference Quad Project’s circuit board.
This is my version 2 board update, which incorporates supply voltage regulation, over-current protection, and trimmer for the 5.000 volt reference all on the same board. Continue reading “Voltage Reference Quad Project Version 2 — Part 1”
Finishing up the Programmable Voltage Reference project …
Assembling the V2.12 Programmable Voltage Reference Board.
I just received the version 2.12 bare circuit boards from OSH Park
Building a case for the
Programmable Voltage Reference project.
While waiting on the version 2.12 printed circuit boards from OSH Park, I decided to do some work on the case.
Continue reading “Programmable Voltage Reference Case”
A precision programmable voltage reference circuit capable of 0.001 to 4.095 volt output in 1 mV steps with an accuracy of 100 uV.
This project is based on a circuit designed by uChip and presented in the Sparkfun forum. There is a Github page for the original design. Continue reading “Programmable Voltage Reference Project”
A quick and easy project to mount a precision 10K ohm resistor for use as a reference standard.
To go along with my Quad precision voltage reference I wanted to add an accurate resistance reference to my bench equipment.
I decided on a 10K ohm precision resistor from Vishay Foil Resistors.
The resistor is a Z series ultra high precision Z‑Foil though-hole resistor with a TCR of ± 0.05 ppm/°C, Tolerance of ± 0.005 % (50 ppm), Load Life Stability of ± 0.005 %, and rated at 0.6 Watts.
After seeing several other voltage reference projects online and many more assembled boards on Ebay, I decided to put together my own version of a multi-output module that I could use for prototyping ADC, and other projects.
I needed at least a 2.048 volt and a 4.096 volt precision reference. An extremely high accuracy 5.000 volt reference was also on my list. I already had an enclosure on hand that I wanted to use, but in my early mock ups the three outputs on the front panel just didn’t look right. So for good measure a 2.500 volt reference was added to the project.
Continue reading “Voltage Reference Quad Project”