ESP32 CoinCell board
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ESP32 CoinCell board

This is an ESP32 Pico D4 project with an accelerometer and 0.69" oled display powered by a rechargeable LIR2450 coin cell. Source files are available on github.com. Mike Rankin writes: I was not made for any specific purpose and was a design challenge to try and made it as small as...

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Comparing MEMS and Electret Condenser Microphones
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Comparing MEMS and Electret Condenser Microphones

MEMS Microphone Basics MEMS microphones are constructed with a MEMS (Micro-Electro-Mechanical System) component placed on a printed circuit board (PCB) and protected with a mechanical cover. A small hole is fabricated in the case to allow sound into the microphone and is either...

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