Raspberry Pi 4 Project 01 - Revision history

Ikevinax at 23:52, 21 April 2023

2023-04-21T23:52:15Z

← Older revision		Revision as of 23:52, 21 April 2023
Line 72:		Line 72:
	GPIO.cleanup()		GPIO.cleanup()
	</pre>		</pre>

			[[Category:Raspberry Pi Projects]]
			[[Category:Single-board microcontrollers]]
			[[Category:Raspberry Pi]]

Ikevinax at 23:50, 21 April 2023

2023-04-21T23:50:58Z

← Older revision		Revision as of 23:50, 21 April 2023
Line 13:		Line 13:
	* Jumper wires		* Jumper wires

	~~== Circuit Diagram ==~~		Each LED is connected to a GPIO pin on the Raspberry Pi through a 220-ohm resistor. The GPIO pins used for each LED are as follows:

	~~The circuit diagram for this project is shown below:~~

	~~[[File:LED Bar Graph Pulsating Circuit Diagram.png\|center\|500px]]~~

	~~In this diagram, each~~ LED is connected to a GPIO pin on the Raspberry Pi through a 220-ohm resistor. The GPIO pins used for each LED are as follows:

	* LED 1: GPIO 21		* LED 1: GPIO 21

Ikevinax at 23:50, 21 April 2023

2023-04-21T23:50:33Z

← Older revision		Revision as of 23:50, 21 April 2023
Line 9:		Line 9:
	* Raspberry Pi 4		* Raspberry Pi 4
	* Breadboard		* Breadboard
	* 10 LEDs		* 10 Segment LED Bar Graph \| Part COM-09937 (or 10 LEDs in a pinch)
	* 10 220-ohm resistors		* 10 220-ohm resistors
	* Jumper wires		* Jumper wires

Ikevinax at 23:38, 21 April 2023

2023-04-21T23:38:22Z

@@ Line 37: / Line 37: @@
 <pre>
-    # Wait a short amount of time
+import RPi.GPIO as GPIO
-    time.sleep(0.05)
+import time
-# Decrease the duty cycle from 100 to 0 in steps of 5
+# Set the GPIO pins for the LED bar graph
-for dc in range(100, -5, -5):
+led_pins = [21, 20, 16, 12, 7, 8, 25, 24, 23, 18]
-     # Wait a short amount of time
+# Set the GPIO mode to BCM
-     time.sleep(0.05)
+GPIO.setmode(GPIO.BCM)
 </pre>

Ikevinax at 23:37, 21 April 2023

2023-04-21T23:37:14Z

← Older revision		Revision as of 23:37, 21 April 2023
Line 35:		Line 35:

	The Python code for this project is shown below:		The Python code for this project is shown below:

			<pre>
			# Wait a short amount of time
			time.sleep(0.05)

			# Decrease the duty cycle from 100 to 0 in steps of 5
			for dc in range(100, -5, -5):
			# Set the duty cycle for each LED
			for i in range(len(led_pins)):
			GPIO.output(led_pins[i], dc > (i*10))
			# ^^^ If the duty cycle is greater than the threshold for this LED, turn it on.

			# Wait a short amount of time
			time.sleep(0.05)
			</pre>

Ikevinax: Created page with "= LED Bar Graph Pulsating Project = This project involves creating a 10-LED bar graph that pulsates light using a Raspberry Pi 4 and Python code. The LED bar graph will have 10 bars, each controlled by a GPIO pin on the Raspberry Pi. == Required Materials == To complete this project, you will need the following materials: * Raspberry Pi 4 * Breadboard * 10 LEDs * 10 220-ohm resistors * Jumper wires == Circuit Diagram == The circuit diagram for this project is shown..."

2023-04-21T23:28:54Z

Created page with "= LED Bar Graph Pulsating Project = This project involves creating a 10-LED bar graph that pulsates light using a Raspberry Pi 4 and Python code. The LED bar graph will have 10 bars, each controlled by a GPIO pin on the Raspberry Pi. == Required Materials == To complete this project, you will need the following materials: * Raspberry Pi 4 * Breadboard * 10 LEDs * 10 220-ohm resistors * Jumper wires == Circuit Diagram == The circuit diagram for this project is shown..."

New page

= LED Bar Graph Pulsating Project =

This project involves creating a 10-LED bar graph that pulsates light using a Raspberry Pi 4 and Python code. The LED bar graph will have 10 bars, each controlled by a GPIO pin on the Raspberry Pi.

== Required Materials ==

To complete this project, you will need the following materials:

* Raspberry Pi 4
* Breadboard
* 10 LEDs
* 10 220-ohm resistors
* Jumper wires

== Circuit Diagram ==

The circuit diagram for this project is shown below:

[[File:LED Bar Graph Pulsating Circuit Diagram.png|center|500px]]

In this diagram, each LED is connected to a GPIO pin on the Raspberry Pi through a 220-ohm resistor. The GPIO pins used for each LED are as follows:

* LED 1: GPIO 21
* LED 2: GPIO 20
* LED 3: GPIO 16
* LED 4: GPIO 12
* LED 5: GPIO 7
* LED 6: GPIO 8
* LED 7: GPIO 25
* LED 8: GPIO 24
* LED 9: GPIO 23
* LED 10: GPIO 18

== Python Code ==

The Python code for this project is shown below: