All Questions
13 questions
0
votes
2
answers
239
views
How to Turn Off Red Idle LED Light on Raspberry Pi 4 When Device is Turned Off
On a Raspberry Pi 4, and I've noticed that the red idle LED light remains on even when the device is turned off. While I understand this might be a default behavior, I'm looking for a way to turn off ...
- 103
-1
votes
1
answer
46
views
using logic level converter between my led ring and raspi 4 but it is not working
I am working on a small project where I am using a SparkFun Lumini LED Ring. The power supply for the ring is external, connected via its own cable and power adapter.
The link of the datasheet of the ...
- 1
1
vote
1
answer
127
views
Using MAX7219 Dot Matrix module with Luma.Led on different GPIOs
I have a MAX7219 dot matrix module (this one) that I'm trying to run on my Raspberry Pi 4 with the Luma.LED library. Its documentation suggests the following GPIOs/pins be used:
Board Pin
Name
...
- 21
1
vote
0
answers
135
views
Problems addressing WS2812B LED Strip with Raspberry Pi 3 A+
Hello!
I am currently having issues addressing my WS2812B LED-strip correctly with my RPi 3 A+. I have followed the following video guide:
https://forum.core-electronics.com.au/t/problems-addresing-...
1
vote
0
answers
34
views
I2C 1 light at a time`
i am currently using the NCP5623 (I2C LED Driver) to light up my 5V 1A (as written on the box) RGB LED strip.
i followed the sample connection as shown on the datasheet of the NCP5623 and when i ran ...
- 11
1
vote
1
answer
965
views
Raspberry Pi 4: exchange power LED with activity LED
the default situation with the two LEDs on my Raspberry Pi 4 is as such:
[situation now]
Green LED: read and write activity of my SD card
Red LED: Power
I would like to change the the LEDs to:
[...
- 13
3
votes
4
answers
314
views
Replace a red Led activation on RPI 4
I have a PI 4 and accidentally broke the red led. I don know how to identify it in order to get a replace piece and soldering Any idea or help, please?
1
vote
0
answers
107
views
Rasberry Pi 4 LED.off() will not turn led off in a function
I have a simple circuit connected to my Raspberry Pi 4 with 3 push buttons and an LED. The buttons are connected to gpio2(pin 3), gpio17(pin 11), and gpio16(pin36), with the LED connected to gpio25(...
- 11
1
vote
1
answer
106
views
Unable to control GPIO from the code
I am using raspberry pi 4b along with Freenova kit. I am trying to make the LED blink however it does not blink instead it is ON of the time. I have tried different code (C,Python,Java) but none of it ...
- 31
1
vote
2
answers
2k
views
Pi4 GPIO Control with Java
I am basically trying to turn on a led by using pi4j library. My code is pretty simple:
public static void main(String args[]) throws InterruptedException {
GpioController gpioController = ...
- 113
1
vote
2
answers
107
views
Another illuminated LED button question
I am completely new to Raspberry Pi and electronics so please forgive my lack of knowledge but I am trying really hard to learn something new. I have tried searching the forum but things said in any ...
- 13
0
votes
0
answers
45
views
Flashing of LED
This is my first post here so HELLO and sorry if I'm posting in the wrong place.
I had assigned a time limit of 40s for led blinking. Can I pause the blinking of this led and make another led to blink ...
2
votes
0
answers
281
views
Malfunctioning Raspberry pi 4, red and green led on all the time
My Raspberry Pi 4 won't boot anymore, there is no picture on the monitor, and both LEDS (red, green) are on all the time, they do not blink. I formatted the SD card with SD Card Formatter and ...
- 21