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Where should I connect resistor in LED?
Since this resistor is only being used to limit current through the circuit, it can actually be located on either side of the LED. Placing the resistor on the positive (anode) side of the resistor will have no differing effects from placing the resistor on the negative (cathode) side of the LED.
Does it matter where you put a resistor?
A resistor is a small component that’s designed to provide a specific amount of resistance in an electronic circuit. Resistors are blind to the polarity in a circuit. Thus, you don’t have to worry about installing them backwards. Current can pass equally through a resistor in either direction.
Can a pull down resistor be used in a pull up circuit?
Though being less commonly used, a pull-down resistor is still a valid option. With many pull-up or pull-down resistors in digital logic level circuits ranging from 2 to 4.7k, we’ll need to calculate the actual values of these resistors.
How to set up pull up resistor on Arduino?
Step 1: Establish 9600 bits of data between your Arduino and your PC by entering the code below: Serial.begin(9600); Step 2: Initialize digital pin 2 as an input with the internal pull-up resistor enabled: pinMode(2,INPUT_PULLUP); Step 3: Enter the following line, making pin 13, with the onboard LED an output
How does a pull up resistor work in a logic gate?
With a pull-up resistor connected, the output still works in the same way as a normal logic gate in that when the output transistor is OFF (open), the output is HIGH, and when the transistor is ON (closed), the output is LOW. Thus the transistor turns ON to pull the output to a LOW level.
How to calculate resistor resistance in digital logic?
With many pull-up or pull-down resistors in digital logic level circuits ranging from 2 to 4.7k, we’ll need to calculate the actual values of these resistors. Similarly to how we calculate resistance for a normal resistor, we’ll use the formula in Ohms law, where R = Voltage/Current or in short, R = V/I