tebl on GitHub has built three projects to enhance radio-controlled cars using microcontrollers programmed in Arduino. Module Description RC Light System A functional light system for RCs. It’s big, bulky and does mostly what I want it to do. RC Exhaust Controls an RGB LED mounted inside the exhaust pipe of an RC. On heavy throttle it starts glowing red, ease up on the throttle afterwards and you get flashing colours as it backfires. RC Dashboard Connected to the receiver, it shows a digital throttle gauge on a small OLED-screen. Check it all out on GitHub ..read more

An optical reflective sensor is a composite electronic device with two elements – an IR LED and an IR photo-transistor. The IR LED blasts light, and when something bounces the light back to the photo-transistor, the transistor turns on and the amount of current flowing through it increases. This makes the sensor great at detecting when something is in front of the sensor. The Adafruit STEMMA Reflective Photo Interrupt Sensor guide has everything you need to get started with using this breakout. There’s pages for overview, pinouts, CircuitPython, Arduino and resources for download. Read more a ..read more

The Adafruit LTC4316 I2C Address Translator does on the fly I2C address translation. There’s an ‘input I2C’ half, and an ‘output I2C’ half. And any devices on the ‘output’ half will automatically have their addresses translated from the input half. Specifically, each device will have bit A6 flipped (most-significant-bit of the address) and then bits A4 and A5 can also be flipped or kept the same, with the two DIP switches on board. To determine the translated address, we use XOR bitwise math. The Adafruit LTC4316 I2C Address Translator guide has everything you need to get started with using t ..read more

It’s half USB key, half temperature-humidity sensor… it’s the Adafruit SHT4x Trinkey. There’s an ATSAMD21 microcontroller on board with just enough circuitry to keep it happy. One pin of the microcontroller connects to a NeoPixel LED. Another pin is used as a capacitive touch input on the end. A reset button lets you enter bootloader mode if necessary. The Adafruit SHT4x Trinkey guide has everything you need to get started with using this board. There’s pages for overview, pinouts, CircuitPython, Arduino, CPython and resources for download. Read more at Adafruit SHT4x Trinkey ..read more

Cool build from maker WesleydeGraaf! This would definitely come in handy for a charity walk-a-thon or school track and field day. A simple lap/run counter using RFID for users. Uses a database for storing the lap count of users. Code can be easily changed to a checkpoint system or other system. See the full project details here on Instructables ..read more

The Adafruit Proto Doubler PiCowBell is intended to be treated like a mini solder-less proto plate to simplify programming and sensor connectivity for your Raspberry Pi Pico board. Reset button? Yes! STEMMA QT / Qwiic connector for fast I2C? Indeed. Battery with recharging and on/off switch? Affirmative. Plug-and-play so no soldering necessary when used with a Pico H or Pico WH? Here you go! The Adafruit Proto Doubler PiCowbell guide has everything you need to get started with using this breakout. There’s pages for overview, pinouts, CircuitPython, Arduino and resources for download. Read mor ..read more

The Adafruit Proto Under Plate PiCowBell is intended to be treated like a mini solderless proto plate to simplify programming and sensor connectivity for your Raspberry Pi Pico board. Reset button? Yes! STEMMA QT / Qwiic connector for fast I2C? Indeed. Plug-and-play so no soldering necessary when used with a Pico H or Pico WH? Here you go! The Adafruit Proto Under Plate PiCowBell guide has everything you need to get started with using this breakout. There’s pages for overview, pinouts and resources for download. Read more at Adafruit Proto Under Plate PiCowBell ..read more

Fun project by labsmastak up on Instructables: The Buzz Wire Game is a timeless amusement that challenges players to navigate a twisted wire maze without letting the wire touch the sides. It’s not just a game; it’s a test of dexterity and focus. With this step-by-step guide, you’ll learn how to construct the game board, wire up the circuit, and customize the design to make it uniquely yours ..read more

ggwave-arduino is an Arduino library for transferring data over sound for microcontrollers. There is an iPhone & Android app for transmitting digital data via sound to an ESP32 development board with an Adafruit Electret microphone. The second breadboard (on the right) can also send data to the breadboard on the left. The GitHub repo has an examples folder for sample circuits. See a demonstration video below and more on GitHub ..read more

Christoph Döberl tweaked a motor fader from a mixpanel to use it as an internet-connected light dimmer with lots of IoT magic. To demonstrate the possibilities and make a cool project, we decided to build a light dimmer with the motor fader. The idea is to read the sensor in the fader and dim a smart light bulb accordingly. When adding multiple input interfaces each fader can be adjusted to represent the correct value by controlling the motor. The resistance sensor allows a stepless control for any brightness level, which comes in handy especially in the evening hours where a dimmed light ca ..read more