Speeduino Open Source ECU: Arduino-based engine management

The Speeduino project is a flexible, fully-featured engine management system (EMS aka ECU) based on the low-cost open-source Arduino platform. It provides the hardware, firmware, and software components that make up an engine management system, all under an open license. With over 1,000 installations, Speeduino has evolved into a product that meets the needs of the hobbyist and enthusiast community without the price tag of a traditional aftermarket ECU.

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Open source microPython development board design

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Design of talking color detection system based on Arduino

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Open source HC-05 Bluetooth module and Arduino entry reference solution

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Rocket flight computer design based on Raspberry Pi Pico

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Carbon dioxide and dust monitor based on Arduino Nano RP2040 (PCB + code)

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Smart robot dog based on Arduino nano (schematic diagram + PCB)

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Raspberry Pi-based audio spectrum display (schematic + code)

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DIY Portable 1.8V Power Supply (Reference Design)

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RPI-PICO control panel reference design for RVs

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Arduino Pro Mini 328 based washing machine timer reference

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Raspberry Pi development board optimization design

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A single-room home automation solution powered by a Raspberry Pi

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Open source lab-grade automated microscope

Wee Noise Makers PGB-1: Open Source Audio Synthesizer

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RP2040 based ohmmeter with audio and ribbon feedback

A low-profile version of full-featured software radio based on Raspberry Pi Pico (fully open source + detailed explanation)

With just a Raspberry Pi Pico, an analog switch and an op amp, you can build a powerful SDR receiver covering the LW, MW and SW bands. Capable of receiving signals from halfway around the world.

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Mock Badge for the 2023 Hackaday Competition (Open Source)

This year, Supercon badges become analog badges! (Or at least pretend to be pretty convincing.) Taking inspiration from the fluorescent oscilloscopes of the past, the 2023 Vectorscope badge is part analog audio playground, part art project, and all about prototyping. Who doesn't love the warm glow and lovely green fluorescence of an old Tektronix tube scope?

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USB2.0 full-speed analyzer based on Raspberry Pi RP2040

This is a simple USB sniffer based on the Raspberry Pi RP2040. It supports low speed and full speed modes. The firmware presents itself as a virtual COM port (VCP), so no additional software is required and it is compatible with all operating systems.

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Breadboard without jumpers: Based on Raspberry Pi Pico, analog switch matrix replaces jumpers

Flirting with jumper caps is a common practice on most boards, but not this board, which is designed to replace all those wires with an analog switch matrix. All one has to do is plug in the device and make a virtual connection on the accompanying GUI. There are also many built-in functions such as DAC and ADC, and the circuit can be switched under the prototype as needed. It also has some LEDs embedded in the breadboard area that light up and provide visual cues that they are connected to each other.

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