Linked Questions

2
votes
3answers
492 views

10 resistors from VCC to data [duplicate]

I realise that this has been asked elsewhere, specifically: That's actually a wiring diagram (and some of the folks around here call them cartoons) but it will suffice as the schema can be seen since ...
0
votes
1answer
212 views

2.2K Resistors on Microchip Data Input Lines [duplicate]

I've just been dabbling for the first time into circuit design with microchips and I noticed a lot of designs put 2.2K or 4.7K resistors on some input lines. I get that this is to limit the ...
3
votes
6answers
4k views

Why do we need a resistor here? [closed]

In this circuit Why is there a resistor if the ground already is 0V?
5
votes
2answers
11k views

Do I need to use a resistor with a microswitch to limit current for an Arduino Uno?

I'm using an Arduino Uno to control a small robot and I'm starting to add micro-switches as bump-sensors. I know that when I'm creating a circuit with LEDs I need to use resistors to limit the current ...
8
votes
2answers
12k views

DSLR Hotshoe wiring to Arduino

I want to wire the hotshoe of my dslr (Nikon D5100) to my Arduino board in order to react to the shutter release of the camera. I measured a 5 to 8 volts signal between the trigger and the ground ...
4
votes
3answers
651 views

Don't understand how these resistors operate in this circuit

When reading a manual on using a PICAXE and an I2C device I saw this diagram. I can't work how this would behave as wouldn't it make the connection on the lines constantly high due to the connection ...
2
votes
2answers
822 views

Purpose of a Pull-Down resistor [duplicate]

Being just a beginner I'm really getting confused of pull-down resistors. Please have a look at the diagram below. Here there is a 10k pull down resistor is connected to ground and the pin 2 of ...
5
votes
3answers
792 views

Why does a pull down resistor eliminate floating input

Ever since I connected a button to an Arduino for the first time, I've wondered how does the resistor prevent floating input from happening? I've read several answers to similar questions, seen videos ...
2
votes
3answers
222 views

What is the purpose of the resistors in this schematic? [duplicate]

I’m looking into using a CD4021B shift register with an Arduino Uno, and found a schematic online detailing how to use it. However, I am confused as to what the point of the 10kohm resistors is, would ...
0
votes
1answer
255 views

Open collector and open drain logical gates

Can somebody explain what open collector and open drain mean? I'm a CS student, and I'm really a newbie in terms of electronics and I only managed to find some "expert level" explanations, which I ...