STM32 OpenSource Multimeter
see the article here or the video here
Specs (revision 1.2 - latest stable; see below for 1.3)
- voltage measurement: ±6 or ±60 V ranges, with DC or RMS data acquisition
- current measurement: ±60 or ±500 mA ranges, again with DC or RMS
- can measure voltage and current simultaneously and display the product, ie power
- measures continuity and displays the resistance and voltage drop
- can perform simple component testing
Additional features: hold function (freezes the display); isolated USB connection; buzzer; exposed I2C port; status LED.
Additions (revision 1.3 - experimental)
- two aditional voltage ranges, so now you have ±60 V, ±6 V, ±600 mV, ±60 mV
- adjusted current ranges to ±200 mA or ±2 A, lowered burden voltage
- other minor tweaks and improvements