Unanswered Questions
89 questions with no upvoted or accepted answers
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Arduino sketch works on ATmega1280, but doesn't work on ATmega328 (Arduino Nano)
I'm working on arduino based RGB LED strip controller.
This simple schematic was used to control 12V channels via 5V PWM signal from arduino:
I have also connected an HC-05 bluetooth module to be ...
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2
votes
1
answer
111
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Transmitting voice via VLC
The project I'm working on: Short-Range Coded Visible Light Communication System.
Visible Light Communication (VLC) systems use light to transfer data between transmitter and receiver over short-range ...
CommunityBot
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2
votes
0
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87
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Servo wont work with LED code!
I'm basically trying to combine my servo code and my LED code but whenever I add my servo code the LED refuses to turn on at all.
I am super new to arduino sorry if this doesn't make any sense!
Servo ...
- 15.4k
2
votes
0
answers
185
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Single LED controlled by two pushbuttons - one of which acts like a toggle switch
Trying to control this LED with those 2 pushbuttons - one button that starts a short flashing sequence, another pushbutton acts like a toggle switch, one press bulb is on, another press bulb is off.
...
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2
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0
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55
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Two LED Patterns Task Controlled by GUI
I am very new to Arduino and coding/programing. I set a task for myself to make a simple circuit of 5 LEDs controlled by pins 2, 4, 8, 11, 12. I want to be able to make two different pattern for the ...
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2
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0
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272
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How can you turn off the LEDs on a SparkFun AS7265x Spectral Triad (Spectroscopy Sensor)?
I'm a newbie to program an Arduino but I need to turn off a LED from a external Spectroscopy Sensor.
This is the Sensor:
There are three LEDs on this sensor and they're turned on automatically when ...
2
votes
1
answer
2k
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RGB LED using potentiometer and push button
I'm currently working on an assignment which has to turn on an RGB LED using a potentiometer and button.
The problem I currently have is that the button is supposed to change the color I want the LED ...
CommunityBot
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2
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0
answers
135
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Problems with Arduino Uno Usb 2.0 shield when using a keyboard
I have an Arduino Uno and a usb 2.0 shield in which I connected a keyboard to. I have all the necessary libraries installed but what I am trying to figure out is how to light an led when I press a ...
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2
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0
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Sketch for 5 randomly fading leds not working as expected; what could be wrong?
I'm working on a project with a starry sky, based on fiberoptics and 5 leds.
The code should work this way:
Start on average brightness, then go up or down according to a set of randomly chosen ...
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2
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0
answers
3k
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LED strip with 12v power connected to ESP32
I'm looking at controlling a ws2811 strip and I have seen mention that you should share the same ground between the strip and the controller, which does make sense.
I do not currently have a proper ...
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2
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0
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TLC5917 SPI Speeds
I am attempting to use 3 x TLC5917 chips to drive a row of LEDs in PWM. The LEDs share a common anode being powered through a transistor, with each LEDs cathode going to pins on the TLC5917 Chips.
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2
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0
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93
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Do I need one N3904 for each LED?
I want to control 4 (or more) LEDs using the PWM output pins of my Arduino.
Here is how I have it on a breadboard, and it's working for me.
Question:
Is this schematic inefficient? Are there any ...
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2
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0
answers
1k
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Switch on/off LED 24V using a MOSFET
I try to switch on/off IKEA Ledberg LEDs which are powered with 24 V using the setup from this tutorial video: https://www.youtube.com/watch?v=sVyi7yWuXxs
I use a IRLB8721PBF MOSFET. When I switch ...
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2
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0
answers
221
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Sparkfun Spectrum Analyzer: Problems with frequency bands
I bought around 2 years ago the Spectrum Analyzer Shield from Sparkfun, but I never had the time to do something with it. Recently I found the time to start a project to build a graphical equalizer. ...
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2
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0
answers
227
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LED Webserver control not working
I've got an Arduino Uno and Ethernet shield, trying to test it out with a simple on off switch for the on-board LED.
My Code is this
// FILENAME = LED2.ino
// SOURCE= http://www.instructables.com/id/...
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