Design with Adafruit Hallowing M4 in Cirkit DesignerThe Adafruit Hallowing M4 is a versatile and powerful development board designed for creating interactive projects and games. Based on the ATSAMD51 microcontroller, it is equipped with a full-color TFT display, user interface buttons, various sensors, and LEDs. This board is particularly popular among hobbyists and educators for Halloween-themed projects, wearable electronics, and prototyping.
This circuit features an Adafruit ItsyBitsy M4 microcontroller connected to two GC9A01 displays. The microcontroller drives the displays to render animated eyes, with the code handling eye movements, blinks, and iris scaling. The displays share common control signals, and the microcontroller coordinates their operation to create synchronized visual effects.
Open Project in Cirkit Designer
This circuit is designed to simulate a Ghostbuster trap prop with various interactive features. It includes an Arduino Mega 2560 to control a sequence of events such as playing audio tracks through an MP3 player module, creating vibrations with a haptic motor driver and DC motors, displaying patterns on a bi-color 24-bar LED bargraph, moving servos, and activating a relay-controlled water pump. The sequence is initiated by an IR receiver, and the circuit incorporates LEDs, resistors, a step-down buck converter for voltage regulation, and a Bluetooth module for potential wireless control.
Open Project in Cirkit Designer
This circuit features an Mtiny Uno ATmega328P microcontroller as its central processing unit, interfacing with a variety of sensors and peripherals. It includes a 0.96" OLED display and an MPU6050 accelerometer/gyroscope for user interface and motion sensing, respectively. The circuit also integrates a TF LUNA LIDAR for distance measurement, a DHT11 sensor for temperature and humidity readings, and uses a 9V battery with a 7805 voltage regulator for power management. Communication with a computer for programming and data exchange is facilitated by an Adafruit FTDI Friend module.
Open Project in Cirkit Designer
This circuit is designed for environmental data collection and logging, utilizing an Adafruit Feather M0 Express microcontroller as the central processing unit. It interfaces with a BME280 sensor for atmospheric temperature, humidity, and pressure measurements, an SGP30 sensor for monitoring air quality (eCO2 and TVOC), and a STEMMA soil sensor for detecting soil moisture and temperature. The system is powered by a solar panel and a 3.7v LiPo battery, managed by an Adafruit BQ24074 Solar-DC-USB Lipo Charger, and provides easy access to the microcontroller's connections through an Adafruit Terminal Breakout FeatherWing.
Open Project in Cirkit Designer| Pin Number | Function | Description |
|---|---|---|
| 1 | VBAT | Battery input for an optional LiPoly battery |
| 2 | EN | Enable pin, can be used to turn off the power |
| 3 | GND | Ground |
| 4 | USB | USB connection for programming and power |
| 5 | SDA | I2C data line |
| 6 | SCL | I2C clock line |
| 7 | #0 - #13 | General purpose I/O pins |
| 8 | A0 - A5 | Analog input pins |
| 9 | TX | UART transmit |
| 10 | RX | UART receive |
| 11 | SCK/MOSI/MISO | SPI pins |
| 12 | RST | Reset pin |
| 13 | 3.3V | 3.3V power output |
Q: Can I power the Hallowing M4 with a different battery? A: Yes, as long as it's 3.7V and can connect to the JST-PH battery connector.
Q: How do I upload code to the Hallowing M4? A: Connect the board to your computer via USB and use the Arduino IDE or CircuitPython editor to upload your code.
Q: What programming languages can I use with the Hallowing M4? A: The board supports programming with Arduino (C/C++) and CircuitPython (Python).
Below is a simple example code that demonstrates how to use the Hallowing M4 with an Arduino UNO. This code will initialize the display and show a message.
#include <Adafruit_GFX.h> // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library for ST7735
#include <SPI.h>
// Pin definitions for the Hallowing M4
#define TFT_CS 6
#define TFT_RST 7
#define TFT_DC 8
// Initialize the ST7735 TFT display
Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_RST);
void setup() {
tft.initR(INITR_144GREENTAB); // Initialize display with the correct settings
tft.fillScreen(ST7735_BLACK); // Clear the screen to black
tft.setCursor(0, 0); // Set the cursor to the top-left corner
tft.setTextColor(ST7735_WHITE); // Set the text color to white
tft.setTextWrap(true); // Allow text to wrap to the next line
tft.print("Hello, Hallowing M4!"); // Print a message to the display
}
void loop() {
// No need to do anything here for this simple example
}
Remember to install the necessary libraries through the Arduino Library Manager before uploading the code to the Hallowing M4. This example assumes you have basic knowledge of using the Arduino IDE and connecting the Hallowing M4 to an Arduino UNO.