Questions tagged [digital-in]

Question 1

I have a device programmable via an 8 bit digital parallel bus. I would like an Arduino to translate from a parallel 4 bit output of an existing device to 8 bit by intentionally reducing the ...

Question 2

I am running into a problem on a very basic functionality. I want to read the state of an LED. I have confirmed that under the specified circumstances, the LED receives 1.9V. I try to read its state ...

Question 3

I'm working on a Home Automation Project. I can turn on-off ESP32 pin from Alexa and Google Assistant Successfully now. What I need help is with a way to read if the AC supply is ON/OFF on the Arduino ...

Question 4

I have project by Arduino mega which have 22 inputs and 22 outputs and buzzer reset and output reset pushbuttons , it have two status if the input is high(not continuous ) the output will on and the ...

Question 5

I have the following really simple code. On every iteration it'll read the first pin, and if it's high - do some serial IO. Then do the same with the second pin. Nice and simple, works during my tests....

Question 6

I'm working on a program which listens for certain bytes on serial through an if/then/elseif ladder. I want to also check if a pin (say, A15) has been given a HIGH state, by another Arduino with ...

Question 7

I am using a NodeMCU board and have already used 6 digital pins as output for interfacing with the LCD. I intend to use 2 more digital pins, one as input and other as output for interfacing an ...

Question 8

What are the voltages on a ATmega32u4 (eg Arduino Leonardo) such that a HIGH or LOW is read? I want to ensure that I'm reading the chip reference manual correctly, where Table 29-1 says: VIL: Input ...

Question 9

I am working on a phase detection project in which i am trying to find the order in which the incoming signal comes. I converted the 240v 50hz Ac signal to a 7v 50hz square pulse. when i connect one(...

Question 10

I am having a digital output of 24VDC and 0.5A from ABB IRC5 controller. I need to feed this digital output to the digital input of Arduino uno. How can I do that?

Question 11

Good day. I have a specific project need and I spent the past couple of days searching on forum, blogs, etc and I'm still not clear if that's feasible to do with Arduino or not. I need to monitor ...

Question 12

I'm doing some Home automation and am currently trying to automate my intercom system. My overall aim is to be able to detect when someone has pressed the buzzer and then to be able to open the door ...

Question 13

I have an ADC that have sampling rate up to 40 MSPS, but i use 8 MHz clock so it will be 8 MSPS. The board used is arduino nano. The problem is i have to sampling it just 2 MHz (because the capacity ...

Question 14

I have the signal channels of four 5v magnetic encoders connected directly to the digital pins of the arduino due. I am aware that this is not allowed according to the specification which says that ...

Question 15

I work with Arduino DUE. I would like to configure few of my digital pins as INPUT pins. When the µc sets these particular 4 pins , the DUE must be activated. Something like a DATAREADY pin in the SPI,...

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Questions tagged [digital-in]

Fast digital IO

Cannot read LED state

Read Digital Input from Arduino Pin defined as OUTPUT

arduino mega buzzer output

How long does my digital pulse need to be for it to be read?

How can I scan for a HIGH signal on digitalRead during the main loop, while running other things?

Using NodeMCU D8 (GPIO15), D4 (GPIO2) and D3 (GPIO0) pins

Digital I/O threshold voltages for ATmega32u4

Digital input on one pin is copied to other pins

How much voltage and current can a Arduino uno digital input sink?

How to monitor state of 50 Digital Inputs

Correct wiring?

How to set sampling rate for digital pin input? [closed]

USB reset fails on arduino due because of 5v on digital pins

Digital Pins reads 1 when configured with internal_pullup

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