手可摘棉花

An open source multimeter suitable for DIY

Overview

1. Voltage measurement: ±60 V, ±6 V, ±600 mV, ±60 m range, with DC or RMS data acquisition

2. Current measurement: ±250 or ±2500 mA range, also using DC or RMS

3. Can measure voltage and current at the same time and display the product, that is, power

4. Continuity measurement and display of resistance and voltage drop

5. Simple component testing can be performed

6. Frequency measurement up to 10 MHz

Additional features: Isolated USB serial port ; 2KB EEPROM; 4-bit expansion port; battery voltage measurement and USB charging; firmware update via USB; integrated stand; retention function

Note: This project was started using STM32F1, now it uses STM32F3.

Design Files

STM32F1-open-source-multimeter-master

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2025-06-19 08:46:59

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