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Guides, tutorials and project ideas for Arduino, ESP32, Raspberry Pi, sensors and other electronic components.

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01/03
HandpickedDIY Projects

How to Build a DIY Crypto Hardware Wallet for Bitcoin, Ethereum and BSC (STM32 + OLED)

Build your own hardware wallet from an STM32 board, a 0.96" SPI OLED and two buttons, running the open-source Trezor One firmware. Wiring, firmware build, flashing, and setup for BTC in Trezor Suite and ETH/BSC in MetaMask.

11 min read
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HandpickedGuides & Basics

How to Use a Multimeter: Step-by-Step Beginner's Guide (DT830D)

Measure voltage, resistance, continuity, diodes, current and transistors with a digital multimeter. Simple steps for the DT830D with diagrams, typical readings and safety tips – no experience needed.

12 min read
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HandpickedDIY Projects

boAt Stone 1500 Battery Bypass: How to Open It and Run It on 12 V DC Power

Battery dead or swollen? Take it out and run your boAt Stone 1500 straight from a 12 V adapter. Step-by-step: opening the speaker, setting an XL4015 buck converter to 8.0 V, wiring diagrams, testing and fixes.

14 min read
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