Basic circuit for different types of sensors [DIY]

A basic robot motor driver brain, utilizing the Wemos D1 Mini.

Foldable Lamp Box - Night Light - reacts to sound and has adjustable brightness, USB port for charging, runs 24h on Battery - ATtiny85 processor - 25x WS2812 leds

ROM IC-Card for TANDY WP-2 and related machines.

A powerful WiFi-connected ESP32 tool that lets you sniff, inject, and manipulate RS485 traffic in real-time, controlled via a mobile app.

I used this board to connect an Intel Compute Stick with mail hdmi connector to a portable 7-inch display with female hdmi input. You can use it as you wish. The clearance between the soldered connectors is 7 mm.

MQTT Configurable Electronic Shelf Label System with Elecrow 3.7" E-Paper Display and Web Server

By combining a vintage radio's sensitive front-end with modern SDR technology, I created a powerful hybrid receiver that offers both the nostalgic feel of classic hardware and the precision of modern software.

This is a small (17.9 mm x 10.3 mm) breakout board for PixArt's PAA3905 optical flow sensor. It provides X-Y velocity at 126 Hz via Optical Flow and 35 x 35 pixel video camera at 18 Hz. There is a well-commented Arduino sketch showing how to use the device for navigation and frame grabbing. The frame grab rate is significantly improved over its predecessor, making for a practical low-resolution still imaging and video camera capability. Power usage is a modest 3.5 mA and the sensor can move in and out of shutdown mode quickly allowing flexible power management. The light level adjustment is automatic (although can still be done manually), streamlining sensor management. The sensor is smaller than its predecessors, with fewer pins making design and assembly easier. Light level sensitivity extends down to 5 lux. The frame grab occurs at a crisp ~15 Hz (56 milliseconds to complete), allowing low-resolution video imaging using the infrared-sensitive sensor element. Open source design!

Create a custom ESPHome dashboard for your smart home setup with the help of CrowPanel 7" HMI Display

This is actually a modern replica of the so-called "E-Meter", device used in Scientology practices which costs several thousand dollars.

This board is for learning purpose.

Dive into my hands-on review of the Elecrow All-in-One Starter Kit for Micro:bit. See what’s really inside the box, how fast you can get started (even if you’re a total beginner), what works great and what could be improved, and why this kit just might be the perfect solution for students, teachers, makers, or anyone curious about electronics and coding!