Questions tagged [output]

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

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6k views

ISIS Proteus - Simulating a buzzer using an Atmega 8535 Micro controller

I am new to micro controller programming. I am programming a Atmega 8535 micro controller using AVR Studio and simulating the circuit using ISIS Proteus. In ISIS Proteus, there is a buzzer output ...
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1answer
706 views

CMOS output voltage depending on Vss and Vdd

How does output voltage in CMOS depend on Vdd and Vss? As far as I know, it is limited by Vdd when Vss = 0 (ground) but what when Vss is not 0 (for ex. -2.5 V?)
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1answer
2k views

Use the same pin as digital output and analog input with an ARM (sam3x / Arduino Due)

I have an application where I need to use one pin as a digital output and analog input. I switch between input and output at a "high" frequency (>1 kHz) and it takes to much time to disable and enable ...
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2answers
801 views

If a clock edge matches with data output edge what should SPI read?

I have an analog to digital converter that reads in and sends data out on falling edges. I also have two MCU's the FEZ Hydra and the FEZ Cobra. I've noticed using the oscilloscope that the data into ...
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1answer
672 views

CD40106 output voltage

I'm testing some CD40106BE from Texas Instrument, CMOS Hex Schmitt Trigger (Datasheet Here). Vdd = 5V (Pin14) Vss = GND (Pin7) Vin = 5V I measured a Vout = 3.8V on every IC I tested, with a Led on ...
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1answer
986 views

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 ...
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2answers
92k views

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 ...
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1answer
3k views

How to connect Verilog module's output to several wires?

Say I have a module foo(in1,in2,out); and module mad1(in,out); module mad2(in,out); module mad3(in,out); While instantiating ...
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1answer
212 views

Using a Line Decoder (Multiplexer) to set multiple outputs high

When using a 3-to-8 Line Decoder / Multiplexer such as the 74HC238, can I set multiple outputs (1-8) as high at the same time? As opposed to only one output high at any given time, and the rest are ...
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1answer
2k views

Set Output Port High Low

I'm using MPLAB to compile a program in C using the CCS compiler. I want to set an output port as high or low using defined ports. #bit portOut1 = PORTC.0 So, I ...
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3answers
546 views

Microcontroller I/O configuration

I have been using PIC microcontrollers and have been using MikroC for the programming but I am little bit confused about the ports. On a PIC16F84A the port is defined in mikroC as ...
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1answer
283 views

DSPIC30F4011 - Pin labled as “Alternative”, can I use it?

I am using a DSPIC30F4011 PIC ( datasheet ) to send commands to three devices (one Bluetooth, model RN42 and two LED Drivers, model TLC5947). In the data sheet for this PIC (on page 13), it has three ...
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1answer
2k views

Can't turn ON transistor from output of comparator?

I can't seem to turn on a 2n2222a with the output of a LM339 comparator, as soon as the base is connected to the output, directly or with a resistor, even if the output is 5 volts, 9 volts, I always ...
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2answers
1k views

5V Tolerance of 3.3V OUTPUT pin

Let's assume the following scenario: uC (@3.3V VDD) drives an I/O pin HIGH 3.3V (just to be clear, it's not an open-drain pin, so the p-channel mosfet of the output pin is actually driving the pin to ...
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1answer
2k views

Thermocouple signal conditioning - how to deal with low output swing margin of amplifier?

I have this thermocouple conditioning circuit. Let's say my gain is 100. Minimum low level for AD8237 is 20mV. As K type thermocouple outputs 40uV per 1C, I will have 4mV per 1 degree C. This means ...
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1answer
202 views

implementation of a large number of outputs (1024+)

I want to control 32x32 (or even 64x64) pieces of electroluminescent or electrochromic film with a microcontroller. Film itself will be driven by supertex hv816. Planned refresh frequency 2-4Hz. ...
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3answers
3k views

Using Single Ended Output with Differential Input by Grounding one Input

I am making a frequency generator using the AD9833 (programmed from the PIC16F876). I wish to use a Programmable Gain Amplifier to adjust the signal level before being sent to a power amplifier (...
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2answers
1k views

5v output to 3.3v?

I have a microcontroller and a Raspberry Pi, both running off of the same 5v supply, in parallel. The microcontroller has 4 5v output pins and the other is a Raspberry Pi, that can only accept inputs ...
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1answer
131 views

Powering the output side of a voltage regulator?

Would powering the output side of a voltage regulator cause any damage to it? (The ground pin would be attached as well) It will not be normally, but I am making a multi-voltage power converter and ...
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1answer
84 views

How do we OR two bits in ATxmega128?

I am working with ATxMega128 and programming it in C. I have two inputs coming from a sensor and I want to turn on an LED when I get output from either of the sensor. I can blink my LED if i get ...
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2answers
1k views

How can we alter a single pin of ATxMEGA128?

this might be a basic question but I did try searching for the answer before posting the question. So, I am trying to set one of the ports to output. I used ...
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1answer
2k views

Build an Audio Toggle Box

I want to build a small box with two audio inputs and two audio outputs, with two switches to control the current input/output. Something like this: http://www.youtube.com/watch?v=mQzLnt0_-zU I've ...
4
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1answer
369 views

PIC pins change state when DC motor connected

I'm new to PIC programming, and having trouble getting getting it control a DC motor. It's a PIC18F25K22, and a TI L293D driver. Power is suppliued by a 5V linear regulator connected to a desktop ...
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5answers
4k views

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 ...
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1answer
10k views

Can I connect a BNC output of DVR to the antenna input of a LED TV? [closed]

I have a DVR and a LED TV. The DVR provides 2 video outputs, VGA and BNC but the LED TV only accepts 2 possible video input (HDMI and antenna socket). In my mental model, as the BNC output of DVR and ...
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2answers
649 views

how do I output through GPIO pins instead of RS232 from a Z8 Encore MCU?

I'm currently learning about MCUs in school (read: n00b) and I'm trying to fool around with the equipment at home. Problem is that I only have a netbook and don't have any serial IOs on it, so I have ...
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3answers
520 views

Drive Fight on 7400 Series

I'm currently designing a 7400 series circuit to drive LEDs from a set of shift registers (74595). Each shift register's tri-state input is wired to the output of a 2:4 decoder (74139), and the ...
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2answers
20k views

How much power does 5V and 6A provide in Watts?

Am I right in concluding that a unit that says 5 V and 6 A on the back supplies 30 W of power? Or is it that it requires 30 W to be powered? And if so, how do i calculate how much power the unit ...
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2answers
4k views

Is pinch off voltage of JFET constant?

The drain current is related to gate to source voltage by the following equation: \$I_d = I_{dss} (1 - \frac{V_{gs}}{V_p})^2\$ Now, with changing \$V_{gs}\$, I think \$V_p\$ also changes. I am ...
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3answers
5k views

Using lots of slide potentiometer for computer control

I want to mount a bunch (say 16+) slide potentiometers in a long project box (or other housing that can sit on a desk) that I can use to interact with software on my computer, specifically lighting ...
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4answers
3k views

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? ...
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2answers
200 views

Maximum effective range of RG-6/U in CCTV

How long RG-6u i can use in my cctv? what's is the effective range using RG-6u?
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1answer
382 views

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 ...
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4answers
11k views

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 ...
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3answers
2k views

What shift register ICs am I looking for?

I'm designing a project that requires far more I/O than a typical microcontroller offers. No problem, right, just use shift registers and stuff. Wait nope, why am I having problems? I'm planning on ...
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2answers
8k views

difference between dry contact mode output and open collector output

We have a device which can work with dry contact input and a device which gives open collector output. Will it inter-operate? Is there any difference between dry contact mode output and open ...
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2answers
6k views

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 ...
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2answers
2k views

Op amp rectifier : transfer function and output impedance

I'm working on an EE student project which uses a rectifier to keep the peak value of a sine wave. You can find a PSpice pic of the schematics below (Ve is the input (1kHz), Vs is the output). Op amp ...
7
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1answer
1k views

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 ...
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1answer
3k views

Transformer - If the Output V number matches, does it matter that the A numbers are different"

The transformer that came with my Kinkle Fire say "DC Output: 5V1.8A". I want to install some Fastmac Usockets in my house but their specs say "Output: 5VDC 2.4A". Do the different A numbers matter? ...
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2answers
232 views

Handling audio (from mic to headphones)

Right, I'm new to electronics, but this is what want to know: What do I need to take a mic input, and output it to some ear phones (standard jack, can be mono). I want to build a motorcycle intercom, ...
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1answer
5k views

stepper motor digital frequency and speed?

In what way the frequency of digital pulse affect the stepper motor funtion. I want know this because i can send digital pulse through my data acquisition card at rate of 100Hz. I want to run bipolar ...
4
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1answer
758 views

Netduino to power 12V LED Strip

I'm a programmer by nature, but I thought I'd try dabbling in programming a micro controller. I've hooked up my voltage meter, and have figured out how to switch my output ports on/off, and they're ...
2
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1answer
818 views

Logic Buffers for CPLDs Outputs (and Inputs?)

Today, I tried to use a ULN2003a darlington array as a buffer for my CPLD's outputs. While it works well, I have a concern. The max. voltage where the Max V is guaranteed to read a low is 0.8V. The ...
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5answers
860 views

Pulldown resistor on MCU output?

I'm using an MCU to drive a set of SSRs, and whenever I reboot the MCU, the outputs that I have attached to the SSRs go high temporarily. I know that a pullup/pulldown resistor can keep a CMOS input ...
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6answers
3k views

Simplest possible I/O for Homebrew 8-bit CPU

I am working on designing an 8 bit cpu as a personal project for no real reason. I am using mostly 74HC series chips and am generally focusing on ease of programming over performance. I am using ...
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2answers
197 views

Connect multiple in/outputs in predefined order (beginner question)

I want to create a device for my guitar pedals which can rearrange my pedals in any given order. I have the following: At the beginning of the device I have an input for my guitar. For each pedal I ...
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2answers
331 views

Video entry sender has only one signal line for Microphone + Speaker

I am planning on connecting an off-the-shelf door camera (audio/video sender) to my project. I've posted an extract from their manual here The video output is composite which I can support, but ...
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3answers
1k views

Displaying text on a LilyPad?

What are the best options to show a line of text on a LilyPad Arduino, probably using a matrix of LEDs? Are there any thin and inexpensive displays? The main problem is that the only things I can ...
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2answers
349 views

How do I translate voltages to user-supplied levels?

I'm working on an AVR/JTAG/whatever programmer. The programmer will interface with chips running at various voltage levels, ranging from 1.8V to 5V. The programmer runs at 3.3V. The programmer ...

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