An LED is a type of light source which is typically fairly small and has low power requirements.
-1
votes
0answers
33 views
Does anyone want to flash a led on aurdino? [on hold]
I have written two simple pieces of code that run on raspberrypi & PC happily piTest.ino(click to view code) to blink the Arduino LED. Here is how you use it:
to set up the python script, you ...
4
votes
2answers
95 views
Arduino onboard LED pin number as a constant
To use the onboard LED on an Arduino one usually has to know the pin number (13 in most cases), but is there a constant in the Arduino IDE one can use as well?
So is it possible to use something ...
1
vote
2answers
27 views
Digit LED has single input, multiple outputs for each segment. Concerns about “sinking” 5v supply into digital pins
The model name is 5161BS
Pins 3/8 are input and the rest are output for each individual segment.
I have connected pin 3 to the 5v pin on the Arduino, and the rest to individual digital pins.
With ...
3
votes
2answers
43 views
How to use a common anode 7-segment, 4-digit display?
Please take this question as an example to (my own) answer below.
I've got an 7 segment, 4 digit LED display, but I don't have any idea on how to wire it.
I don't understand the difference between ...
1
vote
1answer
21 views
Arduino Timer Button
I am wandering how I would make it so the arduino uno will start a timer when button a is pressed and send "Start" or "Begin" or something like that to the console window. after the timer has started ...
-2
votes
0answers
14 views
Arduino led codes [duplicate]
#include <SoftwareSerial.h>// import the serial librarySoftwareSerial Genotronex(10, 11); // RX, TX
I want the above code to be control led by voice. Can you help me how to add speech ...
0
votes
1answer
24 views
How do I adjust the scale/calibration of a photoresistor?
This photoresistor has a min/max of 0-1023.
I'm trying to scale the brightness of a cathode RGB LED based on the sensor's value, but based on my current lighting, the min/max readings I generally am ...
1
vote
1answer
38 views
Neopixel Ring - How to breathe in a circle motion?
I'm trying to get an effect like (https://vine.co/v/Mwwbi5a1BFK) using a neopixel ring. I can get the neopixels to turn on and off in a circle motion and I can get the neopixels to fade all at once. ...
1
vote
1answer
25 views
How to wire and use a B10K linear LED potentiometer?
I've bought some nice looking LED potentiometers from Ebay. They look like this.
I'm very new to low level electronics/hardware and I don't know how to wire it. It has 4+2 pins.
Also, how to use it in ...
4
votes
2answers
156 views
How to use a Bi-color matrix led 8x8 with 24 pins?
I've just buy this 8x8 LED matrix WLG M20088A/BEG and I'm trying to light all the LEDs in one single color (green) but I don't understand how the 24 pins work for this specific model.
I know that ...
0
votes
2answers
62 views
Neopixel led strip stops responding after change in brightness
I have an arduino UNO hooked up to a neopixel LED strip with 148 lights. Most of the time it works fine, but when I upload a program that changes the brightness frequently, particularly when I ...
0
votes
1answer
19 views
Can I use the TLC5940 LED Driver if I'm already using other SPI devices on my Arduino mega?
The way I understand SPI is that 3 wires are shared (MOSI, MISO, & SCHK). The slave select is pulled high when you want to write to a specific device. The 3 shared wires can be daisy chained. The ...
1
vote
0answers
21 views
ICT Bill Accepter
I have a ICT a6-15scp-usd4-ii. I have all of the wires for it. I dont have the gambling machine it came out of and it was laying around. Is it possible to make a Light come on when a bill is put in? ...
0
votes
2answers
66 views
Arduino Nano no output on any controllable pins except for RX and TX pins
I have 2 Arduino Nanos which don't output anything on any controllable pins except for RX and TX pins. I used an LED which I have tested works on the 3.3v/GND and 5.0v/GND. When I try to control the ...
1
vote
1answer
53 views
Need help debugging my Binary Clock
I have tried everything but I can't get my binary clock to display correctly. The diagram and code are here: Binary Clock | Electronics Lab.
The hardware is based off this (it also explains the ...
1
vote
1answer
47 views
Is it possible to control a 12v led matrix with an arduino?
This is a bit home automation but if I want to control my 12v LEDs and I have 8 free pins would it be possible to drive 16 lights as a matrix. I was looking into running 8 LEDs with an 8 channel relay ...
3
votes
3answers
64 views
Are there sensors that can detect the color of an LED?
Are there sensors that can detect the color of an LED?
I am working on an Arduino project that needs to detect the color of an LED on an external device. I am trying to identify a light sensor that ...
1
vote
1answer
38 views
RGB LED Resistance
In tutorials I've seen, people connect every LED of a RGB LED to a resistance. I understand the purpose, but could we simply put the same resitance once, if we connect it to the common cathode or ...
1
vote
2answers
53 views
Addressing EACH of the 3x3x3 LEDs separately
I read a few 3x3x3 LED tutorials, e.g. let us take this one:
http://www.instructables.com/id/Making-an-Arduino-3X3-LED-Cube-in-Less-Than-30-Min/?ALLSTEPS
As far as I understand, you can address any ...
0
votes
1answer
50 views
Using Arduino Uno to make digital LEDs go to music
I've just started playing around with Arduinos... I found relatively simple project on youtube: https://www.youtube.com/watch?v=5U354Qp6j24. I followed the instructions, loaded up the code, and ...
0
votes
3answers
36 views
Led issue with arduino controled by raspberry pi/python
I'm having an issue with my project. My project is 8 leds and a potentiometer on an arduino being read and controlled by a raspberry pi running python.
when I'm using a potentiometer the signal is ...
6
votes
3answers
367 views
Why does an RGB LED between VCC and PWM work?
I'm an Arduino beginner and I recently bought a cheap starter kit on eBay. One of the lessons in the starter kit is an RGB LED controlled by 3 PWM output pins. However, the arrangement of the ...
1
vote
2answers
113 views
How can I dim a 10w LED?
I'm trying to dim a 10w LED via Arduino PWM.
This is the LED that I have: http://www.banggood.com/10W-Warm-Pure-White-High-Brightest-Save-Power-LED-Light-Lamp-p-88169.html
Without knowing much about ...
-1
votes
1answer
32 views
Morse code translator Loop the same sentence
I'm a newbie so forgive my ignorance.
I'am using the Morse code translator to light up the LED which is fine but after it has processed the sentence it turns off. How can I get it to loop the ...
0
votes
1answer
32 views
Changing how a longpress is executed
I have an RGB LED common Anode attached to my Uno and this code detects a long press to turn the LED on and off. Short presses cycle through colors, then off.
The problem is that a longpress is ...
1
vote
1answer
64 views
Arduino non-blocking software PWM LED fader not working
I am trying to write a simple software PWM to fade some LEDs because I don't have enough PWM I/O Ports.
The code evaluates how long you want the LED to fade, and breaks it down into a number of ...
1
vote
3answers
76 views
Running light, without delay, and a potentiometer
I am just getting hands on to my Arduino Uno.
I am have finished the blinking light tutorial, managed to read a potentiometer, build a running light with delays and as well a binary counter.
Now I ...
3
votes
1answer
67 views
constant current or constant voltage power supply to use with RGB shield with high power LEDs
So, I got an arduino uno and a RGB shield from velleman for christmas because I mentioned I might want to do a project with high power LEDs - a neat surprise, but now I have to use it (:
The shield ...
1
vote
1answer
46 views
Audio Visualizer (not working properly)
Parts
Arduino Uno R3 (Atmega328 - assembled)
Adafruit Bicolor LED Square Pixel Matrix with I2C
Backpack
Electret Microphone Amplifier - MAX4466 with Adjustable Gain
Half-size Breadboard
...
0
votes
3answers
106 views
Why resister after LED?
I'm new to electronic but very good with Software.
I bought the Ardunio Starter Kit. In the first chapter we made a circuit and placed the resister before LED on anode side and provided the 5v and ...
0
votes
1answer
63 views
Why is 1020 steps used for crossfading colors on an RGB LED?
I'm looking into how to smoothly crossfade between colors on an RGB LED with the Arduino and I've found this piece of code for doing it:
https://www.arduino.cc/en/Tutorial/ColorCrossfader
I ...
1
vote
1answer
48 views
What causes a “blip” in LED brightness with sequence of 254, 255, 0, 1 brightness values? [duplicate]
I am seeing a "blip" in LED brightness when trying to fade a red LED on an Arduino UNO.
This code demonstrates the "blip" seen in brightness right after a 254, 255, 0 sequence. When the brightness ...
0
votes
1answer
74 views
Flashing dotStar LED
0I have a DotStar LED strip that I want to make it blink (e.g., 1 second on, 5 second off in an endless loop).
I tried doing so via the script below but it does not work. Can someone please explain me ...
0
votes
3answers
69 views
Arduino C, Led > binary alternative all lights
I'm trying to alternatively have a random int generate a binary number with 4 lights.
This is my current code, However, it seems that all the lights(leds) go on, I don't think the minus option ...
2
votes
1answer
47 views
Adafruit TLC5947 breakout board is not working with my Arduino Uno
I am trying to use this board (setup tutorial on left hand nav) with my Arduino Uno. I have tried using their example code, as well as my own simplified code, to turn on a single blue LED.
The ...
1
vote
1answer
191 views
Seeking help - Using CJMCU 8*8 LED matrix with arduino
The CJMCU 8*8 LED board is a grid of 64 W2812 (addressable) LEDs. The board is configured as if it was one long LED strand (just a single DIN, 5v and GND). For some flipping hair pulling reason, my ...
1
vote
2answers
35 views
Light up multiple LEDs with standard Arduino Uno
I am trying to find out if it is possible to light up multiple LEDs with a standard Arduino Uno. Say I have 500 LEDs and logically I give each one of them a number from 1 to 500. In my test scenario ...
0
votes
2answers
69 views
Light leds on this board one at a time
I am playing around with this Tinycircuits 16 Led board and I can figure out how to persistently light two led's at the same time. The page comes with an example that i can modify but I can only do 1 ...
2
votes
3answers
76 views
Displaying binary to LEDs
I've written a program for Arduino UNO and 3 LED lights. The program is supposed to turn an inputted number into binary and then display it on the LEDs, on being 1 and off being 0 I have looked it ...
0
votes
1answer
66 views
Blink question with breadboard & LED
I tried a basic Blink example and I found a strange case where :
Works
Does not work
Can someone explain me what is happening ?
0
votes
2answers
61 views
Issue with simple project
I'm new to Arduino and today I have a problem with this code:
int led_1 = 10;
int led_2 = 11;
int led_3 = 12;
int button = 3;
int time = 0;
byte val = 0;
void setup() {
// put your setup code ...
1
vote
1answer
27 views
Time counter on a seven segment display
I have a seven segment display module which is connected to microcontroller ATMega 2560. I want to display a time counter on the ssd (upto 999 sec.). How can I achieve this ? Thanks
2
votes
2answers
68 views
How to make 2 LEDs flash in a 5/4 Polyrhythm?
Basically I want one LED to flash 5 times in the same amount of time it takes another LED to flash 4 times. This is what I have, but they are flashing independently and I need them to flash ...
0
votes
1answer
74 views
Programming addressable LED
I have TM1812 addressable LED strip (1meter long 96 LED). I am looking a way to program it and i found this http://www.deskontrol.net/blog/arduino-based-artnet-node-for-led-pixels/
and its mentioned ...
0
votes
1answer
65 views
Newbie and string of 300 WS2811s
I’m trying to make a string of 300 Christmas tree lights where the colour of each of the lights is entirely controllable by my own code. I am a programmer so that side of things is the easy part as ...
0
votes
1answer
24 views
Using Digital PIN 11 for DMDCon and IR Remote
I have a project where I would like to control a count down clock using a remote with a:
Arduino Uno R3 Development Board
Funduino Uno Protoshield Board
Freetronics Dot Matrix Display Connector
...
2
votes
3answers
269 views
How many LED Strips can we connect to an Arduino Uno? Is there a way to connect 1-3 meters worth without needing extra parts (relays)?
I am looking at Adafruit to purchase some LED strips for a mod for my computer case, and want to power it with an Arduino.
I am looking at the Uno, but the Mega looks good too. I hear the Uno is ...
3
votes
1answer
162 views
Why LED light delay is 5 second in arduino?
My code :
int pin = 8;
int pout = 12;
int result=0;
void setup() {
pinMode(pin, INPUT);
pinMode(pout, OUTPUT);
}
void loop() {
result = digitalRead(pin);
if(result == 1)
{
...
0
votes
1answer
64 views
Arduino Simple Task - sweeping a buzzer and led, not working as expected
Use of the tone() function will interfere with PWM output on pins 3 and 11 (on boards other than the Mega).
UPDATE: IT seems that there is a problem using pin 11 and 13 together but if I use a ...
1
vote
1answer
57 views
Multiple rgb leds
I'm quite new to these things and I need some help, I'm building a computer shelf with plexiglass and rgb leds (one per length) and I need some help to sketch up a data sheet of some sort for this, ...
