TheHWcave

Peacefair-PZEM-004T-. reverse-engineered schematics and interface software

OWON-XDM1041. Files and information for the OWON XDM1041 Bench Multimeter

TC66. Python

PIC-freq.counter-modification. firmware change to improve resolution of a popular "1Hz-50MHz Digital LED DIY Kits Crystal Oscillator Frequency Counter Tester" sold on Ebay and other sites

GPIB-to-USB. GPIB-to-USB interface (Arduino Nano) and GPIB logger (Python)

DPS5005-control. Controlling a DPS5005 power supply using an easy to understand scripting language

TransistorTester. Configurations and hex files for 2 firmware versions of an ATmega328P based transistor tester kit

Enviro-Plus. Experiments in environmental monitoring with Pimoroni's Enviro+ board and Raspberry Pi

OWON-HDS272S. Some information about the OWON Scope meter

BCD-Power-Resistors. Combinations of BCD (1,2,4,8 and 10,20,40,80) power resistors

PowerMon. Scripts and wiring for connecting an INA219 current monitor to a Raspberry Pi

UT210E.

BM869S-remote-access. My python 3 based interface to the Brymen 868S multimeter USB interface

EnviroStation. Using the Enviro+ board and a Raspberry Pi to create an environmental monitoring station for weather data, air pollution and noise

DC-to-AC-converter. A DC-to-AC converter for low current and high stability (for example to verify AC multimeters)

RMS-Waveform-Analyser. A spreadsheet based analyser to see what True RMS and averaging multimeters will display for different wave forms

GPS-FreqStd. NEO 7N GPS based frequency standard