Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [output]

A signal or power being generated by one system for consumption by another, or a connection for that purpose.

565 questions
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Confused about IN/OUT architecture of z80 chip

I am reading the manual, and it's a bit complex. I can't understand the machine code encoding for the life of me, but that's not my main concern ... my main concern is the address/data buses. I do not understand the difference between the "address…
user33553
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5 answers

Hardware solution to fade LED on/off with digital output

I'd like to find a hardware-based solution to make LEDs fade from digital pins. i.e. instead of switching on/off, slowly fading (500ms) into/out of full brightness. I can't imagine a small capacitor taking half a second to discharge... Ideally it…
rom
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What does "rail to rail output opamp" mean?

Context: I have a very similar problem to the one exposed here, and in the best rated answer (by Olin Lathrop), he says we need a rail to rail output opamp. My question: What is a rail to rail opamp? (In what characteristic does it differ from a…
CaptainBleuten
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What is a "dry contact input"?

I'm a PC software guy, a newbie to electronics. Recently, I've got a project in which I need to source for a DAQ that can provide dry contact inputs to an interfacing digital output controller. The controller generates alarm signals. I've…
Joshua
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Reading and understanding electrical specs on laptop AC adapters

My Dell laptop comes with an AC adapter with the following specs: 65 W Input AC: 100 - 240 V, ~1.5 A, 50 - 60 Hz Output DC: 19.5 V, 3.34 A My HP laptop: 65 W Input AC: 100 - 240 V, ~1.7 A, 50 - 60 Hz Output DC: 18.5 V, 3.5 A I have 3…
user3320
9
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1 answer

What's mean these microcontroller pin input/output modes?

I bought an stm32f103ret6. When I saw the reference manual, I saw that it has several I/O modes. For input: floating, pull-up, pull-down For output: analog, open-drain, push-pull I have already worked with AVR MCUs which have tri-state and pull-up.…
brian
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meaning of set low/set high

I often see those phrases in tutorials with microcontroller I/O. An example use is "set pin 3 high", or "set pin 5 low for 20 ms". I also recall reading several different definitions on what that terminology means. Does the low in "set low" mean low…
Ponkadoodle
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Does there exist an IC that allows on-the-fly routing of signals?

Do there exist ICs with N input pins and N output pins which, either via EEPROM setting or via on-the-fly control by a microcontroller, allow one to route each of the N inputs to ANY of the N outputs? In other words, for example, one might use it to…
boardbite
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Simplest, cheapest, fast and minimum footprint current limiting circuit with low resistance in normal state

I have a digital output, driven by the high-side driver with nominal voltage of 24V DC. The load current normally is below 100 mA. The output is monitored, so I can switch it off quickly if I detect a short circuit at the load side. The problem is…
syoma
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Easiest and cheapest way to get digital outputs from a computer to the real world

I need a number of digital outputs to connect my computer to the real world, however it seems that this job is not nearly as easy as I had hoped. I've looked into a number of different methods, ranging from dedicated digital I/O cards, micro…
Faken
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4 answers

Pulldown resistor on output pin, how does output still work?

On a part I'm working with, it says that you can configure the part to operate in a particular mode by "strapping" a particular pin to ground. That is, it wants you to use a pulldown resistor to pull it to ground. From what I understand, when this…
Jack
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Input and Output pin voltage specs on a datasheet

I'm a bit confused about input pin voltage tolerances and output pin voltage values of ICs. I would think that datasheets for ICs that involve signal inputs/outputs would list two values: The maximum voltage for a signal HIGH that it can tolerate…
Thomas E
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How to trigger a transistor from iphone's audio output jack?

I want to trigger a transistor using iPhone's audio output jack. My goal is to turn off an LED(which is fed by an external +5V battery) by sending an audio signal from iphone's output jack. At the beginning i thought it is easy but i encounter many…
user16307
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With a uC, I can input analog voltage levels, how do I output them?

With a uC, I can input analog voltage levels, how do I output them? I have a simple Arduino Uno R3 I had picked up, which has a few of each pin types (analog input, digital output/pwm, serial) and require some sort of voltage output control. For now…
Hopeful Hobbyist
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What does pulldown resistor from Arduino's output pin to ground do? Is it necessary?

I came across the first picture below. But I am not able to find out how such arrangement is necessary or beneficial when you want to switch a load with an N channel MOSFET? Question number 1: Is there any advantages or disadvantages associated with…
arudino.tyro
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