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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22 views

Darlington resistors in autopilot burn from backcurrent

I Have a fairly old (mid seventies) autopilot on my sailboat that has four darlington transistors (SM2174 and SM2184) in the output to the motor. They burn easily if the wheel is turned manually, ...
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26 views

Is this the correct circuit for a Sourcing Digital Output

My objective is simple: Let the user connect any reasonable voltage to SOURCE0 (3.3-48V) and get that voltage at OUTPUT0 when BACKUP0 goes high from my MCU (3.3V signal) I've seen some examples ...
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23 views

LDO maximum output current during short circuit

I am using this IC - LIN Mini system basis chip - TJA1128 Using the LDO in that IC to generate 3.3V with 50mA of load current. I see that the maximum output current capability of the IC is 85mA. ...
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1answer
56 views

DC voltage at the output of push pull stage

I have an output stage. The circuit diagram is as shown: In DC condition, the node X has a DC voltage of Vdd/2. The node Z has a voltage of about 1.26 volts. Vdd = 3.3 volts. Transistors M7 and M5 ...
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22 views

Output resistance of CE amplifier small signal model

I was studying input/output impedance of CE amplifier small signal model and I wanted to know why the output impedance (looking from the collector) is just Rc in parallel with dynamic output ...
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1answer
85 views

Is it dangerous to connect an IC output directly to GND?

Is it dangerous to connect an IC output directly to GND while there is a risk this output can be high? BUF1 is the 74LVC2G125DC dual buffer. datasheet here. But my question could also apply more ...
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28 views

Changing selection lines in a mutiplexer [closed]

We have a 4*1 multiplexer. So it will have two selection lines, AB. Now what if we built the same multiplexer but with BA as selection lines. Would the output change? If it did how would it?
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3answers
53 views

SMPS Input/Output ripple current and ripple voltage

I found a presentation regarding SMPS and found this slide. I am not totally able to grasp the concept of the input and output ripple current. In the above image I have the following questions : I ...
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1answer
47 views

How to generate desired voltage signal in a circuit?

What I am asking is a design or pulse shaping question. We learn about analyzing circuits but not designing them in school. Let's say I have an input signal which is a triangular wave and I want ...
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30 views

TPS54260 DC-DC Buck Regulator BOOT and PH pin voltage drop

I am using TPS54260 Buck converter which steps down 16V to 5V output. Load current is 600mA max. To the inrush current through the output inductor, I did some rework. But after some rework, my 5V ...
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72 views

How to make a sawtooth waveform look less like a staircase (DAC)?

I am making a 4-bit digital-analogue converter using an adder circuit with four inputs. Each input is a square wave of a specific frequency. The output of the DAC is meant to be a sawtooth waveform ...
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1answer
35 views

Capacitor on sensor output purpose

I'm currently using a demo-board from sparkfun for quick prototyping of a hall-effect sensor application. The specific chip I'm using is the ACS723-5AB, a Hall-Effect sensor that can measure between -...
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3answers
38 views

Output drop/change in linear circuits

Lets say I have a linear circuit with some input and output voltages. Assume this is a block with inputs/outputs. When I connect input of another block to the output of my first block, I observe that ...
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38 views

What is the output in Figure 3-19(a) if the input voltage is increased to a peak value of 20 v?

Will it be the same as if the input voltage is still 10 V? Or the zener diodes will breakdown (get damaged)?
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1answer
176 views

What is Hang Input in Logic Design?

When it comes in Digital Logic Design using IC (Integrated-Circuit) what is the term HANG Input means? what does it do? and how will it affect the output of the IC?
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38 views

Fourierspectrum of the output voltage of an real inverting amplifier

First a quick descripton of my circuit: The inverting amplifier amplifies by 20dB, the input voltage is a sinus signal with the Frequency 10 kHz and the peak to peak voltage is 200mV or 10V. The used ...
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1answer
51 views

Using LED driver as PWM digital outputs

I'm building a robotics project where I need to control a lot of DC motors. I picked the DRV8870DDAR H-bridge motor driver chip which needs 2 PWM input signals to control the speed and direction. ...
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2answers
78 views

SN74HC595N Shift register output bizare

simulate this circuit – Schematic created using CircuitLab I'm using an 8-bit shift register on a very basic application for learning purposes, I have three buttons connected to SER, RCLK & ...
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1answer
38 views

What would be the output voltage of the full wave rectifier output when center-tap is removed?

This is the circuit I have been analyzing. My intention is to calculate the output voltage at the resistance RL when the center tap is removed. With center tap connection, output voltage VRL(DC) ...
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1answer
58 views

Measuring Output Ripple Voltage

Please check the below waveform of my 5V output ripple of the buck converter. I am measuring the output ripple across the output capacitor of the converter. Why are these spikes coming while ...
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62 views

Parallel Electrets - working BUT

I know this question is similar to the previous one, but it has a slight tweak. I have 4 electret capsules in parallel supplied by 5V (USB supply). They work fine (so I guess the current hasn't ...
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2answers
49 views

Group multiplexer

I've got a project on my Digital Electronics course and I'm stuck. I've got five 7bit sources which I want to choose from by counter and multiplexer. But multiplexer has only one bit inputs and output ...
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45 views

Common Collector Amplifier - Explanation?

I am new into electronics, and I dont get it how we find input and output impedance of Common-Collector Amplifier. I mean, I dont know what we are looking at when we are trying to find input and ...
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1answer
46 views

Can I use a simple fuse to protect a CMOS over current?

I'm designing an output with a MOSFET transistor to control loads such as relays, motors or incandescent lamps, similar to the outputs of a PLC. Obviously, there is no problem as long as the load ...
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1answer
125 views

Circuit with two voltage dividers in parallel

I have the below circuit. I'm solving for Vx. Vx is just Vout for another voltage divider. So, the top left R is R1 the bottom is R2. Therefore shouldn't Vx be R/3R (Vs) = 1/3 Vs? But it's actually
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114 views

Output stage using 2 transistors

I want to understand how does this 2-transistor circuit work. It is used in a schematic for increasing the current rating at the discrete output stage. This does not look like a standard darlington ...
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52 views

Analog sensor output incorrect when sensor not connected

I created a simple circuit to measure an analogue photo detector output that has 3 pins (vcc, gnd, output). I create a PCB by iron method to test it. But the problem is when the sensors are not ...
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2answers
49 views

With a SMPS charging a capacitor bank. What is the power rating of the SMPS?

I'm working on a project to build a 24VDC to 250VDC switch mode power supply for the purpose of charging a capacitor bank. The capacitor bank will be rated at 250V and 180mF. So, the prime power ...
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1answer
68 views

Output on Pass-transistor NAND gate lower than expected

I have an assignment to design an IC NAND gate, consisting og 2 NMOS-transistors and a designed inverter as seen in figure 1 and 2. But when measuring the output at Vout, we only get about 60% of the ...
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1answer
36 views

Expected output of DFF_2 if DFF_1 has hold violation

I am trying to figure out the output of flop DFF_2 when If DFF_1 has hold violation. My answer - DFF_2(Q) = X If DFF_2 has hold violation. My answer - DFF_2(Q) = X I understand the FF's go to meta-...
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51 views

Television output voltage at the headphone jack

The 3.5 mm headphone jack on an old tv is putting out 49 volts. This would seem too high. I am trying to fault find why my son received a shock from an amplifier body when he switched it on to play a ...
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2answers
52 views

Interconnect 5v - 3.3v

Is this correct to connect 5v outputs and 3.3v inputs ttl logic via an open drain transistor and an internal pull-up resistor on the digital input? I suspect the 5v part can influence to the 3v part ...
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36 views

capacitive displacement sensor calculation

while studying this certain types of problems with capacitive displacement sensors I came across one in particular that I am pretty much stuck. The whole problem is explained in following text and ...
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1answer
618 views

Seven Segment display VHDL code issue [closed]

i am trying to use a seven segment display to show the numbers 0 to 9, using BCD and the dip switch the FPGA Board includes to determine the High and Lows. I found some relevant code but, my FPGA has ...
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1answer
58 views

Is it possible to increase the current avalible without changing voltage on my DAC circuit?

I am using a Raspberry Pi and a Adafruit MCP4725 to control a mass flow controller, as well as powering the DAC, and I am meeting the bare minimum of current to control it with the Adafruit MCP4725. ...
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2answers
41 views

What is the output type of the 74AHC594?

What is the output type of the 74AHC594 IC? I didn't find the answer in this datasheet. There is stated in some datasheets for the 74594 IC from other manufacturers that the output type is buffered. ...
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18 views

Connecting balanced output with unbalaned input using adaptor

I want to connect my audio interface (balanced TRS jack output) with guitar pedal (unbalanced TS jack input) and I wonder if this kind of adapter will work: https://www.amazon.com/dp/B001JYSMV0/ref=...
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1answer
77 views

555 timer that does not output low when reset

I'm trying to design a circuit with the following goals: When not active, output can be either Vcc or floating When triggered by pressing a button, output pulses several times to GND at some ...
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2answers
232 views

What is the meaning of output of an accelerometer

I know this question is not fully related to aviation, but I assume the people on this subsection will also have some idea. Suppose I have an accelerometer resting on a table(flat surface, horizontal)...
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1answer
92 views

Connecting balanced low impedance output with unbalanced high impedance input

I want to send the signal form my audio interface to the guitar pedal effect. I'll use interface's line out balanced output and plan to plug it in to the effect pedal which has high impedance ...
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3answers
124 views

Is it a good practice to use resistors for MCU inputs for this case?

I want to use Arduino Uno or a Nano which uses ATMEGA328P as micro-controller. D2 is now set as INPUT. During the start up I want the MCU to detect whether pin D2 is HIGH or LOW depending on the ...
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1answer
144 views

ESD protection diodes on audio inputs / outputs?

I'm building a digital audio device with 1/4" stereo in and outputs that connect to a CS4272 codec. I'm wondering if and where I should place esd protection diodes. Pictured below is the analog part ...
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99 views

Power Supply - 2x output cables, joined at common rail

I have a 24V 25A power supply providing the juice to my 3D printer but it's a cheap LED driver and it's noisy - it's just the fan but as it's at home it's annoying. I'm looking to replace it with ...
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2answers
48 views

Load Cell Amplifier

I'm not from an electrical background and looking for possible options to amplify the load cell output. I'm using the following loadcell with a 2 mV/V output. http://www.sentranllc.com/pub/...
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61 views

Convert wet relay contact output to dry

I have a PCB which has output : GND and OUTPUT1. The contact is normally open, but when it closes it has voltage output of 4V and also closes the contact when checking on a multimeter. I want to ...
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2answers
72 views

Scanning simultaneously across 2-dimensions electronically (like a “3D oscilloscope”)

I have a laser that has sensitivity to two electrical inputs (that can be input simultaneously). Of course, I can easily add an electrical signal with an input of a "linear sweep", and observe the ...
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41 views

Implementation of complementary filter and output of sensor while stationary

The code for a complementary filtered angle is not outputting the expected angle. I can get close to 90° using arctan formula from the accelerometer sensor data. Whereas, the complementary filter ...
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4answers
946 views

Opamp output to source and to sink

The output impedance of an ideal opamp is zero. The output of an ideal opamp acts as an ideal voltage source. The output of the opamp should be able to output very large currents (to source) and (to ...
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2answers
88 views

Is it possible to toggle a pin between “ground” and “not connected”?

I am trying to control a pump (ismatec ecoline V380) from a microcontroller (xmc4300, infineon) using an analog interface. The pump takes several inputs, most importantly: the speed (from a current ...
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3answers
79 views

What is the safest way to trigger an output?

I need to trip a 12V output with a signal. In other words, I will send a signal through the output of my microcontroller and ...

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