LEDThermometer: LED Indoor Wall Thermometer with Power Adapter

LED Indoor Wall Thermometer with Power Adapter

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LEDBOY: A game console without an LCD screen based on Attiny 1614

This project started with a conversation with a friend and apparently how the LED based consoles that existed in the 70's have never been revisited

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1km radio controller

Powerful 1km 6-10 channel remote control, suitable for DIY projects such as drones and cars.

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100w stereo amplifier board DIY TDA2030 IC with transistor

This is a 100w stereo amplifier board. This project can easily play two 50w speakers.

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100w mono audio amplifier board DIY 2SC5200

This is a 100w mono audio amplifier board. This project can easily play speakers up to 100w. I used two 2SC5200 transistors and a 30-0-30 transformer in this project

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100W fast charging power bank (0.91' OLED screen)

A 100W fast-charging mobile power supply based on the IP5389 chip solution, equipped with an OLED display that can display battery power and temperature.

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PYPRCA: python programmable open source calculator based on Raspberry Pi PICO, developed using circuitpython

Pocket calculator style general purpose programmable device (computer) ideal for learning programming and improving building/soldering skills.

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Raspberry Pi RP2040 direct drive DVI/HDMI interface display cool display

These demos all use Adafruit's PicoDVI branch, which makes the video framebuffer look like a regular Adafruit_GFX object, which makes drawing very easy.

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Open source headphone design based on RP2040 and PCM3060

All files are open source, including software, hardware and 3D printing shells, and how to make and assemble them are described in detail, especially the EQ equalization filter test and frequency response test are explained in detail. The main control uses RP2040 + TI 24-bit asynchronous stereo audio codec PCM3060 with 96/192kHz sampling rate.

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Simple, high-quality condenser microphone DIY for under $100

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IH induction cooker inverter circuit

This reference design provides design guidelines, data, and other content for an IH induction cooker inverter circuit based on voltage resonant soft switching.

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Desktop pen holder and calendar made with raspberry pi pico

In theory, it could connect to Google Calendar and show today's events while still being ongoing. Also on the list of features to be implemented is a switch or sensor that changes mode when the pen is removed, and buttons or touch controls for the user interface.

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Open source microcontroller 3D game graphics engine Pico3D

The current demonstration is running on RP2040, using one of the M0 cores as the GPU.

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MiniQ: a mini quadcopter

MiniQ is a mini quadcopter that is open source from hardware design to control algorithm. The algorithm used for the Altitude Heading Reference System (AHRS) is the DCM complementary filter. The system calculates the height and controls the output PWM of the four motors 1600 times per second. It can be controlled remotely via Bluetooth (Bluetooth Serial Port Profile).

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SpaceX Starlink user terminal modification

Author Lennert Wouters demonstrated how to execute arbitrary code on Starlink user terminals via a custom modchip injected with voltage faults, and notified Starlink of these vulnerabilities.
Although the details are open source, the author does not sell the finished product, nor does he provide details of the modified endpoint firmware and fault injection used in the attack.
The transformation is to use a Raspberry Pi microcontroller

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ST programmable 65W USB Type-C PD charger reference design

This board is based on the ST-ONE main control chip and uses the M0+ core

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Open source audio amplifier

The power supply has a stable symmetrical +/- 40 V to ensure optimal performance.
Maximum power (THD 1%) approaches 100 W into 8 Ω load and 190 W into 4 Ω load (see measurements). All parts are through-hole, making it easy to build the amplifier. The design is completely symmetrical.

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E-books based on Raspberry Pi microcontroller

This time it’s an e-book based on the Raspberry Pi.

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OPen Book: a fully open source e-book that supports all languages ​​and breaks down working principles (schematics, PCB, source code, etc.)

Open Book is an open hardware device for reading books in all languages ​​of the world. It includes a large screen and navigation buttons, as well as audio options for accessibility and ports to expand its functionality. Its fine screen printing aims to demystify Open Book's own design, breaking down for curious readers how the book works and how they can create one for themselves.

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Automatic doorbell with object detection

Every house has a doorbell. When a visitor arrives at a home, he looks for the doorbell switch and rings it to let us know his presence. What if a person coming to your home cannot find the doorbell, or the person is too short to reach the doorbell? The object detection circuit installation below is for reference. The circuit will automatically sense the presence of a person and ring the doorbell.