Wireless communication based on NRF24 and Arduino Pro Micro

Wireless Communication with NRF24 and Arduino Pro Micro

Schematic PCB

Wireless car card with RF module

2 Layers PCB 100 x 100 mm FR-4, 1.6 mm, 1, HASL with lead, Black Solder Mask, White silkscreen; This card is part of the chassis to build a wireless car controlled with the RX480 RF module.

Schematic PCB

Personnel wireless alarm

2-layer PCB 46 x 75 mm FR-4, 1.6 mm, 1, HASL with leads, black solder mask, white silk screen; With this simple circuit you can make a wireless people counter.​

Schematic PCB

Output capacitor bank for signal power or dual supply headphone amplifier

This is a simple output capacitor bank for use in signal powered or dual supply headphone amplifiers. The output capacitor bank protects the headphones from DC current.​

Schematic PCB

Portable wireless touch remote control

A tiny potable remote that can be customized to do different tasks using touch functionalities of ESP32

Schematic PCB

LEDThermometer: LED Indoor Wall Thermometer with Power Adapter

LED Indoor Wall Thermometer with Power Adapter

Schematic PCB

1km radio controller

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

Schematic PCB

Prototype boards for ESP8266, ESP32 and ESP32-S2 modules

This is a prototype board for use with ESP8266, ESP32 and ESP32-S2 modules. The board is divided into areas that can be cut and then put together to build advanced IoT prototypes. After cutting as shown in the picture, you can start assembling the IoT device.

Schematic PCB

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

Schematic PCB

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.

Schematic PCB

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.

Schematic PCB

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).

Schematic PCB

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

Schematic PCB

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.

Schematic PCB

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.

Teacher ChaN’s headphone amplifier design

Teacher ChaN’s headphone amplifier design

Schematic PCB

12f629 microcontroller decodes KEELOG source code, commonly used remote control rolling codes

Schematic PCB

51+sl811 source program + schematic diagram for reading and writing U disk

Schematic PCB

Display of cool effects of 448 digital tubes simulating water flow

Kinetic Digits is a mechanical flipping digital display, consisting of 448 7-segment digital tubes, simulating the effect of water flow. For various effects, it can be produced with the help of the provided host computer.

Schematic PCB

Software and hardware open source portable monitor CatSniffer (schematic diagram, PCB, source code, etc.)

This board is a Swiss Army Knife for IoT security researchers, developers, and enthusiasts. The board can be used with different types of software, including third-party sniffers such as SmartRF Packet Sniffer, Sniffle, zigbee2mqtt, Z-Stack-firmware, Ubiqua Protocol Analyzer, our custom firmware, or you can even Specific software requires writing your own software.

Schematic PCB