You will find in this article projects for interfacing an 8×8 and a 5×7 dot-matrix display with Raspberry Pi. Since Raspberry Pi does not have enough GPIOs, we have used its I2C bus to connect to ...

In the image below you can see the circuit diagram of the LED blinking hardware setup. Here, we have two LEDs, the positive terminal of red LED is connected with GPIO 27 (pin 13) and positive terminal ...

Raspberry Pi LED and switch circuit board This is a small board that can be fitted on top of the Raspberry Pi GPIO pins. It has the following features; 3 individual LEDs 1 RGB LED 2 slide switches 4 ...

Since the Raspberry Pi has a 40-pin GPIO header with many software-controlled pins, it's relatively easy to interface with external circuits to indicate status visually. One of the simplest circuits ...

The Raspberry Pi is a powerful computer in a compact form factor, making it highly useful for all manner of projects. However, it lacks some of the IO capabilities you might find on a common microc… ...

With Opto-pi, there is not an electrical connection between the Raspberry Pi and connected loads (motors, relay coils, etc.) or input signals. Opto-pi uses light to isolate the 8 digital GPIO pins.