Open Source Hardware

Electronics
for Enthusiasts

AK74 designs and builds open source hardware for makers and tinkerers. Every schematic, PCB layout and gerber file lives on GitHub — free to study, remix and build upon.

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Our Products

Open Hardware Boards

Every AK74 board ships with fully open schematics and PCB layouts on GitHub. Design, extend, manufacture — it's all yours.

picoAUDIO board
Audio

picoAUDIO

A fully featured audio solution for the TinyPICO ESP32 — 24bit/96kHz DAC, 3.7W stereo amp, dedicated headphone amp, MEMS mic, microSD reader and GPIO expander.

33 × 57 mm · 4-Layer PCB
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gpioEXPANDER board
GPIO

gpioEXPANDER

I2C GPIO expansion built around the PCF8574. Eight tactile buttons and eight LEDs, breadboard friendly — perfect for prototyping interactive projects.

PCF8574 · 2.5–6V · Arduino Library
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microSD Reader board
Storage

microSD Reader

General purpose microSD breakout with 3.3V tolerance, activity LED, push-push socket and card detection. Mounts horizontal or vertical.

3.3V · SPI · 0.1" Headers
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Why AK74

Built for Makers

Open Source Hardware

Every schematic, PCB layout and gerber file is freely available on GitHub. Fork it, study it, build on it.

View on GitHub

Designed for Depth

Careful multi-layer PCB design, quality ICs and thorough documentation. Not just a breakout board — a platform for serious audio and maker projects.

Available on Tindie

Pick up a fully assembled and tested board from the AK74 Tindie store — ready to plug in and hack.

Shop on Tindie