Build Instructions

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• 1

  Step 1

  Method 1  Using accessories

  Step 1: Materials

  ● 1 x Raspberry Pi 4 model B

  ● 1 x TF card with image

  ● 1 x Raspberry Pi power supply

  ● 1 x 10.1 inch monitor

  ● 1 x Power supply for monitor

  ● 1 x HDMI cable

  ● 1 x Keyboard and mouse

  ● 1 x RGB led(Common cathode)

  ● 4 x Jumpers(Female to female)

• 2

  Step 2: Connection diagram

  There are actually three lights in the RGB color LED, which are red light, green light and blue light. Control these three lights to emit light of different intensities, and when mixed, they can emit light of various colors. The four pins on the LED light are GND, R, G, and B, respectively. The RGB LED I used is a common cathode, and the connection to the Raspberry Pi is as follows:

  Raspberry Pi 4B(in function name)                           RGB LED

  GPIO0                                                                                 1  RED           

  GPIO1                                                                                  3  GREEN

  GPIO2                                                                                 4  BLUE

  GND                                                                                    2  GND  

  Here is the hardware connection:

• 3

  Step 3: Configure for SPI

  Because we need to use the SPI to control the RGB, we need to enable the SPI interface first, which is disabled by default. You can follow the steps below to enable SPI interface:

  First, you can use the Desktop GUI by heading to the Pi start Menu-->preferences-->Raspberry Pi Configuration.

  Then, navigate to “Interfaces” and enable SPI and click OK.

  Last, restart your Pi to ensure that the changes to take effect. Click on Pi Start Menu-->Preferences-->Shutdown. Since we just need to restart, click on Reboot button.

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