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STM32F1-open-source-multimeter
An open source multimeter, with dual ranges for V/I, RMS measurement, continuity, component test and more!ST-Link-V21-clone
A clone of the ST-Link V2.1 with the VCP+MSD+SWO features available.batteryCharger
AVR-based universal battery chargerESP8266-low-power-thermometer
ESP8266 + BME/BMP 280 low power board powered by two AA cellsLithium-Battery-Utility-Board
A small board containing charging, protection, load sharing and voltage boost circuitry.brymen-867-869-interface-cable-rev20
An adapter cable for your Brymen 867 or 869 DMM.brymen-867-interface-cable
A DIY cable I use to connect to my Brymen 867 multimeterBrymenConnector21
Another version of my Brymen 867/869 adapter cable.Wireless-Serial
Simple project for using the esp8266 as a UART-to-WiFi bridgeTheCharginator
Upcycle your old ATX power supply into this 11-port QC-compatible charging monstrosity!ATtiny13-continuity-tester
ATtiny13-based continuity meterLithium-Battery-Series-Charger
a board which enables you to charge multiple lithium cells in series with protection and balancingQC3.0-board
A buck converter with a QC 3.0 compatible outputstm32-watch
A simple 60-LED watchSeven-Segment-Multifunction-Display
A display which can either display voltage or act as a UART/I2C display.uart-isolator
a very simple and cheap UART isolatorPCB-WordClock
A relatively simple and quick to build 100x100 mm WordClock.HAL-drivers
A repo with drivers/libraries for various ICsLove Open Source and this site? Check out how you can help us