MullOverThings

Useful tips for everyday

# What voltage does a high digital pin correspond to?

## What voltage does a high digital pin correspond to?

If the pin has been configured as an OUTPUT with pinMode(), its voltage will be set to the corresponding value: 5V (or 3.3V on 3.3V boards) for HIGH, 0V (ground) for LOW.

## What voltage is a digital output?

Digital Output: A digital output allows you to control a voltage with a computer. If the computer instructs the output to be high, the output will produce a voltage (generally about 5 or 3.3 volts). If the computer instructs the output to be low, it is connected to ground and produces no voltage.

## How to write a high or low voltage to a digital pin?

[Digital I/O] Write a HIGH or a LOW value to a digital pin. If the pin has been configured as an OUTPUT with pinMode(), its voltage will be set to the corresponding value: 5V (or 3.3V on 3.3V boards) for HIGH, 0V (ground) for LOW.

## What are the voltages in a digital logic circuit?

Digital logic circuits operate using two binary states which are normally represented by two distinct voltages: a high voltage V H for logic “1” and low voltage V L for logic “0”. But within each of these two voltage states, there is a range of voltages which define the upper and lower voltages of these two binary states.

## What’s the difference between high voltage and low voltage?

Note that the values of HIGH and LOW voltages and currents differ between TTL logic families and is also much, much lower for CMOS logic families. Also the input voltage and current requirements for micro-controllers, PIC, Arduino, Raspberry Pie, etc will also be different so please consult their data sheets first.

## What is the pull up value of a pull down resistor?

So if we assume a voltage drop of only one volt, (1.0V) across the resistor giving double the input voltage at 4 volts, a quick calculation would give us a single pull-up resistor value of 50kΩ. Reducing the resistive value further, will produce a smaller voltage drop but increase the current.