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11 questions linked to/from Is there a way to have more than 14 Output pins on arduino?
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2 votes
3 answers
681 views

I am an amateur. I know about Arduino, but I am still learning. And I was making this Bluetooth rover with a camera, ultrasonic sensor, mecanum wheels, air-soft shooter, and sand sample collector. I ...
Anik Singh's user avatar
  • 21
1 vote
3 answers
665 views

I'm looking to connect an 8-relay board to an Arduino Uno. A board like this one. However, I don't really want to use up 8 digital outputs if I don't have to. Is there some intermediate circuitry I ...
RickMeasham's user avatar
  • 345
1 vote
2 answers
92 views

Hey guys I have a project that will require 20 I/O pins with serial communication from a computer to control each of the pins. I would like something as small as possible would a arduino micro or uno ...
cameroony's user avatar
  • 13
1 vote
0 answers
39 views

How can I use Arduino Uno Analog Pins as Digital pins, So that I can Attach more components like sensors to the Arduino? My 13 pins are preoccupied and I want more.
Amit Nikhade's user avatar
  • 59
17 votes
3 answers
103k views

Increase the number of digital pins There are many posts that explain how to use more than just the standard pins on the various Arduinos, but none of them properly explain the limitations and ...
cocco's user avatar
  • 451
23 votes
2 answers
10k views

I wanted to make a fairly simple circuit which would flash a series of LEDs in sequence, using my Arduino Uno (more specifically, a SainSmart clone). I wrote my sketch and it compiled fine. After that,...
Peter Bloomfield's user avatar
  • 11k
12 votes
3 answers
29k views

I have a few useful I2C components, such as a 16-bit port expander (MCP23017), which I'd like to use in various projects. What do I need to do to make these work with Arduino? Will it work with any ...
Peter Bloomfield's user avatar
  • 11k
0 votes
2 answers
2k views

I want to make a game of Tic-tac-toe using an Arduino, LEDs and bouncy buttons. Hence I need nine inputs and nine outputs. But you see that an Arduino only has 13 I/O pins. So is there a way I can use ...
Clarskon's user avatar
  • 103
2 votes
3 answers
224 views

I would like to manage many LEDs from my Arduino - 12 or so - but I do not have the available digital pins to do this. Only one LED needs to be on at one time. Instead, I was hoping to control these ...
Rip Leeb's user avatar
  • 367
1 vote
2 answers
309 views

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 I'...
Socrates's user avatar
  • 137
0 votes
2 answers
381 views

I am new in Arduino but I have experience in electronics. I was wondering how can I make a countdown timer using a CD4510 and an Arduino UNO. I know you would suggest that I should connect my seven ...
Miguel Lorenzo's user avatar
  • 113