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

learn more… | top users | synonyms

2
votes
2answers
90 views

Best way to implement outputs pins with leds in a parallel way

What is the best way to implement an output but with also a led, so I can use the output for other purpose (for example a GPIO for a PIC, or a lot of logic gates) but with a led indicador that the ...
0
votes
2answers
80 views

5v hydro power generator produces almost 12v

I have this hydropower generator. At its specs it says that it would produce a 5v voltage. So when I have installed this to my water system, and measure it using a tester it says that it produces ...
0
votes
2answers
42 views

Updating outputs in PLCs

For all PLC manufacturers, is Mass I/O copying the choice for updating outputs? I found that there is another possible method: the continuous I/O updating. Can anyone tell me what is the reason for ...
1
vote
1answer
51 views

FPGA design rules - Using a Module Output Register Value Internaly

I'm trying to optimize a verilog code and I found something that I don't feel it's correct. I found a module that has an output and it's using that output value as a condition in a case statement. ...
0
votes
4answers
112 views

How to increase number of micro-controller inputs?

I have relatively little experience with electronics, but do have a basic understanding. I am attempting to build a measuring device, which will measure 100 points in 0.1 seconds. These will all ...
0
votes
2answers
50 views

Generic question about interfacing a microcontroller with a device: when is the current limit a problem?

I have an Arduino Board, to be precise many models, but let say I want to interface a ATmega328p with another integrated circuit (all is running at 3.3 V). In this case I want to connect Arduino with ...
1
vote
2answers
41 views

A protecting circuit using GPIO of the BeagleBone (Black or Green)

I'm really trying to develop a cape since I need to use 7-8 GPIO-Pins of my BBB Green and Black as Output. I'm too afraid to destroy the board somehow, so I was thinking to implement a solution which ...
0
votes
2answers
61 views

Same pin as output and input

In the 7447 BCD to 7-segment decoder chip, pin 4 is BI'/RBO'. That pin acts both as input and output. I would like to understand how exactly the internal circuitry works to make this possible. On page ...
0
votes
2answers
44 views

How to understand dynamic range of op amp from TI's book

I am reading TI's op amps for everyone. I am very confused about its description about dynamic range as follows I have some questions about it, Since it is the maximum output voltage the op amp ...
-1
votes
0answers
21 views

What is the Maximum Current an Arduino can Supply? [migrated]

I was wondering how much my Arduino I/O pin can output when it is set at Output and is at High. I am using an Arduino Uno R3. Thanks in Advanced.
0
votes
2answers
65 views

Safe way connect a 3.3V output to an input with weak pullup to 5V

I plan to connect a 5V IC to a beaglebone black(explicitly not 5V tolerant 3.3V IOs). For signals going to the beaglebone black I need a level shifter. But the input of the 5V IC has a weak pullup ...
0
votes
2answers
62 views

Why should the output impedance of a current source be much greater than the input impedance of the load?

For a voltage source (except RF circuits), the output impedance of the source signal being coupled must be much smaller than the input impedance of the load. This is first of all done to prevent ...
0
votes
1answer
43 views

input current vs output current

My old/new laptop adapter specs as given below. I understand the output current for new is 4.5A which is OK when compared to old which provides 3.25A load since it can provide more load. However, ...
2
votes
4answers
86 views

Unstable input to trigger LED after 10-15 seconds (12 V)

I have a small excavator that, when fuel levels get low, the warning light flashes irregularly (due to movement of the machine) until it stays on as fuel level gets really low. It's very annoying and ...
0
votes
0answers
42 views

Effect of shade on solar panels

So some frieds and I are building a robot that is powered by solar panels. I am using a 3v 155mAh solar panel. What would be the effects of shade on the current and voltage output? Like, does the ...
0
votes
2answers
52 views

Determining output impedance for a pulse generator

I have a basic question about determining the output impedance of a circuit. Output of this circuit is through R6 in the Figure above. This will be an input for a data-acquisition hardware channel ...
0
votes
1answer
58 views

Connecting Multiple Sensors

I have 4 pairs of "LED + LDR" sensor. I need to be able to switch each of them on/off independently and take reading from the LDRs. To connect all of them to the microcontroller board, I would need 4 ...
1
vote
2answers
77 views

What is the effect of a varying Vcc on the output pin of an IC?

I'm designing a circuit with this transceiver. But I was wondering what the effect would be of an voltage source without a bypass capacitor, so with a possible varying Vcc. Would this affect the ...
1
vote
1answer
52 views

Positive Part of a stereo jack?

Ok, so I'm building a bass/treble cut switch for a guitar pedal and on the diagram that I'm following it shows an output switch with a + label on it. Which part of the jack is that ? Also, where is ...
1
vote
1answer
116 views

Power In does not Equal Power Out

I have the following setup: 480V, 200A service fed into PWM Drive, Drive output going to 1000kVA step up transformer (8.4 ratio) feeding a 2380V/53A 3phase induction motor. The motor is UNLOADED. ...
3
votes
1answer
67 views

Output of a D flipflop upon power up?

I guess the output state of a D-flipflop is unknown upon power up. But what are the chances that it is neither 0 nor 1 but an intermediate state such as VDD/2? The D-flipflop in this question has an ...
0
votes
2answers
66 views

Data received when earpiece connected to audio jack? [duplicate]

I'm still new to electronics and signals. I'm currently doing a project, and i have to detect the type of earpiece connected to an audio jack. So far, i found out that when you plug in your ...
-1
votes
1answer
55 views

Altera FPGA Pinout help

I recently bought an Altera FPGA Cyclone II board off of ebay, it says BAIXUN on the LCD display. It didnt come with any documentation. I'm trying to program the FPGA board but I have no idea what pin ...
0
votes
1answer
67 views

Why can some products take 110v 60hz and also 240v 50hz? [closed]

Most modern chargers can go into any output across the world. I believe this is because of low powered "Switch mode" technology it uses rather than transformers, like they used to. To go from high AC ...
1
vote
1answer
106 views

How to Shift the DC Level of Positive-going Op Amp Input Signal into the Negative Supply Region

I have a 1Vpp 1Hz repetitive arbitrary wave signal that resides entirely above the DC line. IOW there is no negative-going excursion. This is output from an LM358 inverting op amp buffer powered ...
-4
votes
2answers
115 views

Can I play sound from USB, Not from sound card?

I made an FM radio transmitter circuit and it works. It is supplied using a 12 volts transformer. The input of the transmitter is connected to the output of my PC's sound card (just like the way we ...
1
vote
1answer
52 views

Accidentally outputting to an optoisolator

It's your friendly electronic hobbyist again. I am designing a board where I am reading input from an optoisolator like this. IN7 is connected to a peripheral parallel port chip of an old 8-bit ...
3
votes
1answer
176 views

Can I replace watch quartz with DS3231 32 kHz output?

I'd like to know if it's possible to synchronize classical quartz clock by replacing inbuilt quartz crystal with DS3231's 32 kHz output. I need to synchronize my analog watch with RTC DS3231. Am I ...
1
vote
1answer
67 views

Latched outputs on 8255A

I am studying about the 8255A PPI. In Mode 0 of it, it says that the outputs are latched and inputs are not latched. What exactly does it mean?
1
vote
0answers
78 views

continuous DC voltage across output pin of an IC (DAC output)

I would like to ask you one question. Actually in the automotive there is chance of 20v or 5v continues output come across output of my IC (PGA400)i.e output of DAC. I would like to know in general ...
1
vote
2answers
64 views

Simple LM386 Circuit RC Branch Question

Please take a moment to checkout at the LM386 circuit below. The circuit comes directly from the LM386 specifications document: My question revolves around the output branch consisting of the 0.05 ...
0
votes
2answers
36 views

USB controllable digital output ports at >100kHz [closed]

I need to control 8 digital output pins over a USB connection at a minimum of 100kHz. What solutions exists that allows me to do that? Preferable a COTS module if possible. I am thinking something ...
0
votes
0answers
47 views

How to selectively switch on a ground 12v automobile application

I'm a bit of a beginner at electronics but learn fast and am very interested in this. I have a project and I'll try to simplify it to make it clear. I have a simple light circuit attached to a switch ...
-1
votes
1answer
77 views

How to connect a headset as a microphone, and speakers at the same time with only one cable [closed]

So, I recently bought a headset from Tritton, named "Kama", as I got home I noticed a unusual problem... The audio input and output are in the same cable. I would really want to use this as both, but ...
3
votes
3answers
669 views

Correct Way to Limit Op Amp Output Current

I'm planning to use an AD817 op amp in the output stage of my function generator (datasheet). I'm worried about how the part would stand up to a short, so I ran some simulations. The simulation below ...
0
votes
1answer
116 views

How to connect input and output on Bistable Multivibrator

I built the circuit below on my breadboard. I've checked every connection and it doesn't work. The thing I didn't know how to do was connecting the output (a LED) and the input. (a button) I did ...
2
votes
1answer
63 views

Input output voltage problem in PIC32 starter kit & IO expansion board

I have a PIC32 Ethernet Starter kit and IO expansion board. I have a made a simple input output program in which if ...
0
votes
1answer
169 views

How can a speaker have a higher output power than input

Looking around the internet, there haven't been many answers to this questtion. Here is one which doesn't fully explain it: Power input smaller than output? How can this be? So I am confused. I know ...
1
vote
1answer
538 views

Programmatically turn on PIR device with Arduino

I have a D203S PIR sensor operated device. I want to simulate motion detection with my Arduino and then let the device operate as normal. I have seen that shorting the PIR sensor for a couple of ...
3
votes
2answers
248 views

Simple function generator: is current-limiting/short circuit protection/impedance matching necessary?

I have designed a function generator with the intent to provide test signals to a microcontroller or ADC of some other device. However, I may forget that a year down the line and plug it into some ...
0
votes
3answers
129 views

What happens to voltage source if I take out both volt and current with separate circuit using diodes and then combine both separate circuits?

I have 3.8V and 1.2Ah battery. I will use a step up circuit that gives 5v and 200mA output using 2v in (from my battery). Then I will use blocking diode to take voltage only(5v) and I don't need ...
0
votes
1answer
55 views

Question about output current

I've got huge three-phase transformer, primaries are connected in Y configuration, secondaries in Delta, then goes to 6 diode bridge rectifier. Output is about 200 amp 52 VDC. In short, how many ohm ...
0
votes
2answers
49 views

Deactivating NE555P with a latch

I wish to use a two gate latch to control a 555 timer.The goal is to turn off the output by shutting down the IC.Will this happen if I disconnect the positive supply or the ground so there will be no ...
0
votes
2answers
194 views

Arduino - Controlling 8 RGB LEDs (beginner question)

First time poster here. I have an Arduino Uno project that will require 8 RGB LEDs to be controlled. They will be turned on and off with pushbuttons, cycling through red, then green, then blue, then ...
-1
votes
1answer
31 views

Current limit on data out pins of Microchip HV5623

I am working on a project that uses the Microchip HV5623K7-G Serial-to-Parallel converter. As part of the design process I need to determine what would happen if the board I am designing is plugged in ...
0
votes
2answers
39 views

555 Timer Min Max Expected Output Voltage Value

Could someone please tell me what are the min and max output values that should be expected from a 555 timer Output (pin 3) given X volts as the voltage source? For example, assuming that the 555 ...
0
votes
2answers
162 views

Why do we short the input when calculating the output impedance?

I believe the title says everything about the question. My issue has to to do with the following: Consider a two-port given by: $$V_1 = Z_{11}I_1 + Z_{12}I_2$$ $$V_2 = Z_{21}I_1 + Z_{22}I_2$$ Cleary ...
1
vote
2answers
797 views

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 ...
2
votes
1answer
88 views

Why the led is blinking instead of keeping on atmega8

I wrote a very simple sample code into my atmega8 via avrstudio here it is: ...
1
vote
1answer
70 views

DC Op-Amp Output at an unexpected voltage?

For some reason Op-Amps are impossible for me. I'm experimenting with them a little bit. I have the following circuit... simulate this circuit – Schematic created using CircuitLab This ...