This version of my Millivolt Meter is an upgrade on my previous project version and uses a small PCB and Arduino Pro Mini. The display now uses an I2C interface. The build now includes a Hold Reading and Bar Graph display. In addition the calibration method has been upgraded to use a 5 volt reference […]
Category: Millivolt Meter
Design & Build 6½ Digit Millivolt Meter – Part 4
This is a quick update on the Millivolt Meter Project. Changes to the input circuitry and a new software version. Latest schematic and PCB can be downloaded from link below: http://www.scullcom.com/Millivolt_Meter_Ver4.pdf http://www.scullcom.com/Millivolt_Meter_PCB_Ver4.pdf Below are links to the new software (version 7.0): http://www.scullcom.com/SHMMSimple.ino Also the GitHub link below: https://github.com/int2str/SHMMSimple PCB available from OSH Park A PCB […]
Design & Build a 6½ Digit Millivolt Meter – Part 3
In Part 3 of this project I cover Improvements to the input protection. We also add two new features which include storage of calibration setting in EEPROM for automatic calibration at switch-on. The other new feature is an additional button to allow user to set number of displayed decimal place. Below is the link to […]
Design & Build a 6½ Digit Millivolt Meter – Part 2
In Part 2 of this project I cover the Arduino software needed, calibration and comparison with professional 6½ Digit Bench Multimeter. Below are the links for the software (which I have included detailed comments) also the component layout for the PCB: http://www.scullcom.com/LTC2400_voltmeter_software_ver3.ino http://www.scullcom.com/Millivolt_Meter_layout.pdf
Design & Build 6½ Digit Millivolt Meter – Part 1
In this project we will design & build a 6½ Digit Millivolt Meter with calibration. In this first part of this project we design and build the circuit and do an initial test. In part 2 we will cover the software and final test and build. Below are links to the full schematic and PCB […]