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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How to check output voltages?

I'm attempting to repair a Dell P2210 PC monitor. I've traced the fault to a faulty diode on the power supply board. As part of the repair I would like to check the output voltages. The service manual ...
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IGBT Inverter machine gives -39 volt output voltage when probes connect to outputs reverse

IGBT Inverter arc welding machine gives -39 volt output voltage when multimeter probes connected to the outputs are reversed but when it is straight it gives the correct output value of 55 volts. How ...
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Converting current sources to voltage sources

Are the circuits in the figure equivalent?
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Opamp output reverse voltage protection

I have a circuit with an opamp in non-inverting configuration that outputs a +/-10V AC voltage through a connector. The problem I have is that the output may be misconnected to a 24VDC connector, ...
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Designing a system with desired transfer function

Suppose we have a transfer function H(s) = 1/s+1. Is there a general method by which using electric components we can construct such a system?
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2 votes
2 answers
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How does the common emitter configuration offer higher output impedance?

I know that the base-collector region is reverse biased and because of that it offers high resistance but it is the resistance due to biasing. In a video, the person was explaining the hybrid-pi model ...
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Trying to determine kWh used to run a pump on hydronic boiler

Pump is BA Armstrong CV 60, HP 1/12 , RPM 1725, VOLTS 115, AMPS 2.3 SERIAL # 7802
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Dual LED Configuration [closed]

I'm looking for a dual color red/green LED that is not common-anode, not common-cathode, but common anode-cathode (anode of one LED shares a pin with the cathode of the other LED). Can anyone list a ...
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2 votes
1 answer
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VERILOG: why Xilinx AXI Slave declares all output signal as a wires and not reg?

I am reading the code for an AXI Slave provided by Xilinx (here below). I am wondering why they declare all outputs as wire and then assign them to an internal ...
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Power Supply Module Internal Trimmer circuit / Remote Programming Resistor Value?

I am looking to incorporate a 45V supply into a design. These PFE1000-48V supplies have a trimming ability to get +/- 20%, based on +/- 20% variable resistor. I am trying to confirm what this resistor ...
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Is a pull-up on open drain required when output is not used?

On a LTC3886-1 I can read this: I see that all open-drain outputs are tied to VDD on the following application schematics: Is there a reason why pull-ups seem required when the output is not used?
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Design with IC ADP5091 for energy harvesting in Proteus

I want to design this IC ADP5091 using Proteus. But I'm still a newbie and not much understand about this software and this IC. Can anyone help me? Is it right I'm doing this simulation circuit? ...
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3 votes
1 answer
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Headphone output - what is the function of these resistors going to ground between the decoupling capacitors and headphones

The Korg Monotron Duo synth uses the TPA6111A2 headphone amp. The circuit they use is largely the same as the one from the datasheet - except for R78, the 470ohm resistor going to ground right after ...
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1 vote
1 answer
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Digital buffer/driver (74LVC1G07) not outputting signal. MIDI output circuit

I am expericing difficulties with a simple MIDI output circuit. I have checked the input of the buffer and signal is there. However, there is not signal at ouput. . At first I thought that I blew up ...
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4 votes
2 answers
257 views

The output amplitude of the C class amplifier I designed has a larger amplitude than the voltage source. How did this happen?

I designed a class C amplifier. I used a signal generator for the input signal. For the resonance circuit, I used a 3.3uH coil and a 480pF capacitor. The transistor is BC547-C. The resonance ...
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Sensor output resistance

I want to design a circuit using a Hall sensor (reference is SS49E, see datasheet). I want to size the output resistance of the sensor. The block diagram of the sensor is: The output current of the ...
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1 answer
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VOH vs CMOS VOH

I'm new to circuit design. I'm trying to design a clock for a circuit containing 8 SPI to CAN devices. However, I'm not sure if it's possible with a single clock (perhaps this reference). As I'm not ...
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555 timer emits tone regardless of reset value

I made a microcontroller circuit on a PCB and I attached a typical timer circuit to it. The IC of the timer is an 8-pin DIP texas instruments NE555 Resistors are 5% tolerance. Output capacitor is ...
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2 answers
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ADC output and voltage resolution question

I've made an attempt at this question, but the answer was wrong. Could someone please tell me where I was wrong in my calculation?
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1 vote
1 answer
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Mathematical function a of an integrator in series with a non inverting op amp

I am trying to understand the circuit given below so I can make a mathematical model of it. The circuit consists of an integrator with a reference (offset) voltage and a non inverting op amp ...
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4 votes
4 answers
642 views

Why do you suppress the input when finding the output impedance of an opamp circuit?

In most derivations of the output impedance of an (non-ideal) non-inverting opamp circuit, the input terminal is grounded (e.g. page 5/6 here or page 76 here). It also seems to be a common procedure ...
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1 vote
3 answers
122 views

Discrete headphone amplifier output stage

What is the role of R13? I tried simulating this circuit using the Falstad simulator and removing it changed nothing. It is a circuit from Small Signal Audio Design by Douglas Self, second edition.
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Microcontroller 24V digital output

For a microcontroller generating a 20mA industrial digital output. What kind of setup is best? I'm considering: Microcontroller pin driving a low current N-FET to pull a 24V signal to ground. But ...
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Why is the output of this instrumentation amplifier not constant?

So here's the circuit and output voltage, the model is AD620: So according to theory (Vout = 49400/49400 +1)*(2-1) ) i should obtain 2V as the output voltage. Well what i got in LTSpice was a value ...
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3 votes
0 answers
118 views

LDO Outputs wrong voltage

I am working with a very low profile LDO, TCR5RG18A and I'm having issues at the regulators output. It's outputting 0.9V which is half its nominated value (nominal value = 1.8V) The LDO is operated at ...
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Capacitive load in inverter

I'm trying to understand the effect of a capacitive load at the output of an inverter. And how does it affect the output signal when this capacitive load is high and when it is low? Could anybody ...
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1 answer
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Headphones on a line output (vs. headphones output)

I'm designing a device using a DAC (TI PCM 2704 like this one to be precise,) and optionally a headphones amplifier. I noticed that connecting (32 Ohms, closed-back Beyerdynamic) headphones to the ...
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Output state of the AM26LS32AIDR

We are using AM26LS32AIDR in our design, as per the datasheet when input is open/floating, output should be high, but the output is in low state. We are unable to trace out the issue. We followed the ...
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Output of filter is a pulse sequence

Like I have been advised in this question, I revised and updated the circuit to a more workable model, but at the end Im getting this output(the blue is the input and the red is the amplified and ...
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BJT common emitter output conductance

I constructed in multisim a common emitter circuit from the following diagram where the lower Keithley is used to supply VBE and the upper Keithley is used to supply VCE. I obtained the IC- VCE ...
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1 answer
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MM74C933N Output-enabled pin

Studying the datasheet of the MM74C922N 4x4 matrix keypad and I am lost on what the output-enabled pin does, its function, and why it is needed. Any help is appreciated.
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-2 votes
1 answer
89 views

Voltage across capacitor measured in parallel, why not showing Vc?

I am trying to understand something and missing something. In a low pass RC filter, the output is connected in parallel with the capacitor, right, and is phase shifted, because the current in a RC ...
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1 answer
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Why does my output get supercompensated?

I have almost finished a project that was supposed to output a square wave signal with a certain frequency but when I tried to make a small change to the circuit something weird happened to my output. ...
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0 votes
1 answer
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How can I make output voltage bigger for this stabilizer?

For my project I have to design an voltage stabilizer with 5V on input and 3.3V on output.In order to do it , I selected a Zener diode for my reference (D1 and R1) , A divider for negative reaction (...
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1 vote
1 answer
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How to interface MCU with open-collector output?

I have a 3.3VDC microcontroller (based on Nordic nRF52840) with digital inputs which I need to interface to a device that outputs slow pulses (1 second) via an "open collector output". The ...
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1 answer
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Can I margin a synchronous Buck regulator to output all the way from 0V to VIN?

When using a synchronous buck regulator without bootstrap supply for its top MOSFET, it should be possible to margin the output voltage all the way from 0V to VIN by feeding an additional CTRL voltage ...
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1 vote
1 answer
344 views

I'm trying to build a 16-bit adder in Verilog but my output and carryout always have a value of X

...
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-1 votes
2 answers
84 views

Using ARM or any microcontroller text output [closed]

As you may notice, some microcontrollers have an output in textmode with four pin assigned to send serial data. In some cases we may need to use this output for finding our problem,without forcing to ...
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-2 votes
1 answer
232 views

Choosing an opamp for the amplifier stage of a signal generator (uses AD9833) [closed]

I am currently on a project to make my own signal generator for use in testing circuits etc. I have based it largely on a tutorial here: https://www.allaboutcircuits.com/projects/how-to-DIY-waveform-...
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1 answer
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Panasonic RX-DT860 mod, how to unmute audio signal?

I have this older terrific sounding Panasonic Boombox RX-DT860 (huge!) and the laser unit of the CD-player died and cannot replace it. The Boombox also lacks an AUX-input, so time to change it, time ...
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How do you configure the 74HC595 to have low pin outputs at power on?

So far I have somewhat successfully used a shift register (74HC595) and an output expander (PCF8574) to control FETs and BJTs. The main drawback so far seems to be that the chips I’m using have ...
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0 votes
1 answer
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What is the output of this VCO?

I am using ROS-43-119+ from Mini-circuits. I need a VCO that can generate a 40MHz frequency. ROS-43-119+ can generate my required frequency by controlling the tuning voltage. I need sinewave output ...
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1 answer
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How do you design a logic circuit diagram, when there are 2 inputs and each input has 2 values?

So I came across this problem, where the conditions of the output (P, Q, R) will be set to high (1) if the condition is true: The conditions are: Output P : A > B Output Q : A = B Output R : A &...
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1 answer
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How to not fry a Raspberry PI while wiring it to a relatively high voltage pin of a frequency inverter?

I'm working with a frequency inverter brand Metaltex type IF20 and a Raspberry PI. With the RPI I'm going to get some digital readings using one of its GPIOs, and for that I'll wire it to a digital ...
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4 answers
140 views

How to design this circuit in a simulator? What is wrong? (PSpice)

I am trying to implement this circuit in the PSpice simulator: I did it like this: I am getting this result: I was expecting something different than 0 in the output voltage. Could someone explain ...
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2 votes
1 answer
63 views

Electrical Voltage Conversion Confusion [closed]

so my friend bought a drumset from America and had it shipped all the way here to Amman, Jordan. Of course im going to need a convertor for the voltage difference between the 2 countries. However I'm ...
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1 answer
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Pulse duration detection evaluation (opto) LT-22222 from dragino

My question seems simple but i can't find the answer on documentation. (or I don’t have enough skillz) I have this energy meter with pulse output: https://cdn.store-factory.com/www.compteur-energie....
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1 vote
0 answers
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Protection of the pins of an electronic board against overvoltage due to a bad connection

I designed an electronic board with two inputs connected to an ADC (MCP3202), one output connected to the output of an AOP (INA105) and a 24V battery supply. My question is: is there a way to protect ...
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3 votes
2 answers
407 views

How do I calculate sound pressure level (dB SPL) from headphones at a specific setting on my sound card?

I am using headphones with sensitivity 102 dB SPL / 1 Vrms with impedance of 300 ohms. For a particular volume knob setting on my sound card embedded with a headphone pre-amplifier, I would like to ...
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2 answers
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PIC16F18446 Tristate output pins controlled by the value of another pin

In many 74xx chips the high impedance state of pins is controlled by a OE pin. I want a similar functionality for my PIC device. I understand that I could use code to flip the config bits to make the ...
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