Questions tagged [input]

Something put into a system or expended in its operation to achieve output or a result

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Coupling class-D output to audio input of another device

I have a MAX98357 with a class-D output stage that I want to use as the audio input to another device. The other device has a high-impedance (around 2.2 kΩ) input and ground connection. I was thinking ...
Acuario's user avatar
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0 votes
1 answer
49 views

Input stage for sampling audio sine wave with ADC

I'm building a prototype, checking the potential for a project. I want to be able to sample a sine wave from a power amplifier using a Teensy4 ADC. I have a Teensy 4.0 powering an Evisun isolated DC-...
David R's user avatar
1 vote
4 answers
131 views

Understanding input pins [closed]

I am trying to gain a better understanding of input pins. As per my current understanding, they act as a voltmeter with super high resistance and are connected to the ground on one side. When ...
Tomer Gigi's user avatar
0 votes
1 answer
38 views

Transmitting input through USB from microcontroller [closed]

I am making a device, similar to a cross between a controller and a mouse, and I wondered how I would send input to the computer. For example: Transmitting movement, buttons pressed etc. Also, how ...
YANNTASTIC5915's user avatar
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1 answer
70 views

Direction of Op Amps Input Bias Current relative to declared sign on datasheet

Input Bias Current is a parameter of Op Amps related to the Base/Gate currents flowing in or out of the differential amplifiers at the input of the amplifier. It is calculated as the average value of ...
Ricardo M.'s user avatar
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2 answers
42 views

Choosing points for analysing equivalent resistance

I realized there is something fundamental about equivalent resistance I don't understand in terms of application. I understand the part about mechanically simplifying resistors into one resistor, just ...
HFOrangefish's user avatar
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0 answers
35 views

How to get a voltage range of -1.5V to 1.5V using batteries combination of 3V and potentiometer

How to get a voltage range of -1.5V to 1.5V using batteries combination of 3V and potentiometer. So for the details, I'm using batteries of 1.5V each, which are connected in series such that output is ...
Manshi Yadav's user avatar
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0 answers
40 views

How can I increase the output voltage without changing the motor and turbine design?

I made a small hydropower project for school. Water flow rate is too low. I attached 24 V DC gear motor. The output is 4 V. How can I increase it? I can not change the turbine dimensions and motor and ...
Zulfiqar Khan's user avatar
1 vote
2 answers
91 views

Correct way of optical input EMC protection

I tried to find an answer online, but didn't find anything that would make my doubt go away. The thing is: when you want to protect any input, that is referenced to ground, you use ground-referenced ...
Maks's user avatar
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1 vote
0 answers
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Circuit Design Explanation

Can anyone tell me how this circuit will work? I have a AI (analog input) 0-10 V / 4-20 mA and a AO (Analog Output) 0-10 V. I only have one IO pin from ESP32 from which I will use to get AI from a ...
Zunuran Nasrullah's user avatar
1 vote
1 answer
158 views

Unable to open input file in Verilog

I'm having trouble running my Verilog code. Here is my code: module hello(A,B); input A; output B; assign B = A; endmodule And here is my testbench: ...
Afonso Britto's user avatar
1 vote
3 answers
199 views

Button multiplexing supporting multiple simultaneous button presses?

I'm looking to build a MIDI controller from some hardware I've salvaged, which includes 30 non-latching buttons and 30 LEDs. I'd like to base the system around an Arduino board (specific type TBD ...
Rob Reid's user avatar
1 vote
3 answers
126 views

What is the cheapest way to connect a 12V input into a PIC?

I have a pushbutton which delivers 12V when is pushed. I want to connect it to a PIC12F1572 input pin. What is the proper way to do it? My idea was to use voltage divider to reduce voltage under 5V ...
SkePsis's user avatar
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1 vote
1 answer
45 views

Usage of power supply with different output than input of consuming device [duplicate]

I'm about to use a power supply with output of 29V 1.8A for a device (linear actuator) with an input of 12V 5A. Is this a good plan regarding functionality and safety? I'm not even sure if this is a ...
MKorsch's user avatar
  • 113
2 votes
1 answer
67 views

Transformer changing voltages at input

I have a confusion regarding the input voltage of the transformer. Is it necessary that the input voltage of the transformer should change its direction. If I give an input voltage, a sine wave but no ...
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1 answer
78 views

Identify types of circuit(s) that would function as stated

I am trying to build a circuit that will have a trigger input, a clock input and an output that is (10) pulses at clock frequency for each trigger pulse. Would it be multiple circuits (chips) or just ...
bteddy1's user avatar
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0 answers
118 views

Capture/Compare Input Mode is not being triggered by PD12 on STM32F407 Discovery

I am trying to set a pin with capture/compare input mode and I will get the trigger from the PD12 pin which we have a green LED. When I open the debugging mode, I see no change on the "timestamp&...
Elentronics's user avatar
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1 answer
187 views

5V, 50 Ω input single pulse signal to an FPGA

I have a 5 V, 50 Ω input single pulse signal (<1 ms pulse width) going into Trenz TE0711 (operating @3.3 V and 50 MHz clock). Since the input signal is too high of a voltage, I am trying to find a ...
trident_'s user avatar
1 vote
1 answer
98 views

Screw terminal damaged in input 230 V three-phase power supply

I use screw terminals for a 230 VAC three-phase power supply, but it blasts in many PCBs, so I want to replace it. What would be a better solution?
gaurav rajput's user avatar
0 votes
1 answer
75 views

How to command several devices simultaneously from MCU?

I want to control several devices using one MCU. Each device will receive either 1V or 3V depending on the application. I want to use only 2 analog pins from the MCU to send either 1V or 3V to several ...
Bananabread's user avatar
0 votes
1 answer
227 views

Using 0-3 V sensor with 0-10 V PLC

I have a sensor that generates an analog 0-3 V output signal. I would like to connect this sensor to a PLC which has only 0-10 V analog inputs. My questions are: Is this recommended to do in general? ...
bardulia's user avatar
  • 403
1 vote
3 answers
344 views

Pull-up resistor and series protection resistor

Sometimes, you see a pull-up resistor in combination with resistor that's in series with the microcontroller input pin. If combined with a capacitor, it can provide some basic filtering (RC-circuit). ...
Rian's user avatar
  • 11
0 votes
2 answers
404 views

How do I successfully transfer MIDI OUT signal to Windows 7 (32 bit) Desktop PC? [closed]

Things I have: I have an old type MIDI input device (Piano Keyboard Panel) which has a MIDI "OUT" port (female type jack) that has 5 holes. (and no USB port). it has a 9V power input (AC ...
Always Confused's user avatar
0 votes
1 answer
110 views

What is the correct way to measure DC power at the input of a multilevel inverter in a Simulink simulation?

I modelled a 11 level cascaded multilevel inverter, and I would like to measure the power at the input of the inverter, so I do not know how to properly evaluate the actual input power of that ...
salah's user avatar
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1 vote
1 answer
261 views

PIC16F628A input not working

I am using PIC16F628A, MPLAB IDE to coding and Pickit3 to write the code into MCU. The code works on Proteus but does not in real world. I setted A0 pin as input. It should count up normally and count ...
akiftokel's user avatar
0 votes
0 answers
204 views

Combine two circuits in Multisim

I have two circuits, two separate simulations in Multisim, which work fine until I try to combine them. I tried a common ground, on-page connectors, added the voltage follower, but that didn't help. ...
dahaha's user avatar
  • 5
0 votes
1 answer
243 views

I can't get output voltage from flip-flop in PSpice

I'm simulating a flip-flop in PSpice, but it doesn't show an output voltage. This is testing a flip-flop; look at the Q output. It shows X (undefine). I don't know ...
Phongpit Sribua's user avatar
0 votes
2 answers
559 views

What is the difference of summing left and right channel vs using just one of the two?

Speaking about the sound levels, which is the correct way to connect a stereo output to a mono input? Will the signal in case one be lower in amplitude, or is it not sessizable?
Cătălina Sîrbu's user avatar
0 votes
1 answer
50 views

Current rises as the frequency rises in amplifier input stage

lately I have noticed a rather particular effect: in the input stage of a generic amplifier, the current absorbed by the transistors of the differential rises as the frequency rises. Here is the test ...
Brando's user avatar
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0 votes
1 answer
99 views

Audio processing from Arduino

The project is to design a device with multiple audio inputs and multiple audio outputs. The device should be capable to map input and output audio channels. Output almost same as the input. At what ...
kachaya's user avatar
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0 votes
1 answer
132 views

How I can read a 5 V input state correctly with an Arduino?

I want to read the output of a PLC with an Arduino. If the PLC sends a HIGH (5 V) on a OUTPIN, the Arduino should read this HIGH, else LOW. I am generally using this code for this: ...
mehmet's user avatar
  • 1,079
3 votes
3 answers
2k views

Applying 5 V to 3.3 V output pins

I have a 3.3 V microcontroller pin (not 5 V tolerant) with an external 10 kΩ pull-up resistor. By mistake, the external pull-up resistor was connected to 5 V. As I understand it, the only thing that ...
nikomas's user avatar
  • 67
1 vote
2 answers
123 views

Two GPIOs sharing the same hardware IO with 12V

I have a project where due to hardware restrictions I had to incorporate two MCU GPIOs under one wire. Both serve the input and output for a 12 V signal. While the output is being pulled low, the I/O ...
Travis Su's user avatar
  • 246
1 vote
6 answers
322 views

Why are Arduino pins configured as inputs more like a source than a sink?

I've been using Arduinos for years but one thing I have just taken for granted without understanding is why, for example, in a simple button circuit using the internal pullup, you connect the button ...
Tom Auger's user avatar
  • 265
0 votes
1 answer
75 views

How to compute max input voltage for DC/DC LT3483

I am trying to understand why, in the datasheet, the maximum input voltage of the LT3483 changes. In the features we have: "Wide Input Range: 2.5V to 16V". However, on the last page, we have ...
4a4ik's user avatar
  • 3
1 vote
2 answers
703 views

STM32F078 I/O voltages

I'm working on a project right now and I'm building a schematic using the STM32F078. It's 1.8V. I know it has the analog/digital separate power supply of 3.6V max which on the data sheet is called ...
Niv's user avatar
  • 13
3 votes
1 answer
755 views

How can some power supplies run on different input voltages (110/220V)?

Some power supplies can operate under either 110 V or 220 V input, with different rated power though. What enables this behavior? Are there relays to react depending on the inputs and lead to ...
FlakR's user avatar
  • 749
1 vote
0 answers
61 views

Proper Connector for ADC

I am designing a PCB including several ADC chips. For the analog input, I need to choose a proper connector. Someone recommended to use a BNC connector, but it seems to be too huge. Do you have other ...
Valeriya's user avatar
  • 157
0 votes
2 answers
154 views

How to calculate the pull down resistor value for an input pin in a 74HC273 flip flop?

An old circuit I'm checking was built using a philips 74HC273 (CMOS dev) datasheet in a card that is receiving reset and other signals from another card. In that other card, reset signal comes from a ...
Suvi_Eu's user avatar
  • 851
0 votes
4 answers
400 views

Which one is better to use for micro controller input mode? Pull-up or pull-down?

As you know it's better to keep micro controller in "Sink" mode instead of "Source" of energy because it keeps micro controller safe and stable. For the input mode of an AVR (or ...
Golamraj's user avatar
1 vote
0 answers
115 views

Identify Vintage Power Cord for Sears Electric Tray

I found this vintage Sears electric warming tray but it's missing a power cord. I tried a 2 prong figure 8 cord but the holes were too close together or too small to fit. Here are pictures of the tray,...
SpillProofLiquid's user avatar
0 votes
1 answer
34 views

What is the MCU-Pinmode equivalent of a button-press to ground in this scenario?

The more I think about it the more I confuse myself... In the attached circuit if I want to simulate the effect of SW1 (or SW2) closing to ground how do I set the MCU-pin? Connect to Terminal 2 of ...
TommyS's user avatar
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0 votes
2 answers
80 views

Explanation of Analog Input Module

I'm trying to wire this module. I'm just confused as to what the difference is between the two triangles and how would I connect them?
Chris's user avatar
  • 33
0 votes
1 answer
389 views

How to use ESP32's input-only pins with keypad library

I am trying to use a 1x4 keypad with an ESP32. I am using this keypad and this ESP32 (30 pins); I am also using this keypad library. I have only pins 14, 15, 34, 36 (VN), and 39 (VP) free on the ESP32,...
mehmet's user avatar
  • 1,079
0 votes
1 answer
491 views

Design challenges with high input impedance amplifier

After a couple of days of reading (also trying to find similar posts) and trial and error in my simulation tool (TINA) I see no other way than consulting you experts. In my application I have a sensor,...
Maxim's user avatar
  • 167
0 votes
1 answer
86 views

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?
Jun Seo-He's user avatar
1 vote
3 answers
151 views

Is chopping used for the the most precise voltmeters?

Are the most precise nanovoltmeters (e.g., Keithley 2182A) for 1 Hz sampling (i.e., measuring the average over each second) chopping the input stage? I can't tell from datasheets and am curious how ...
bobuhito's user avatar
  • 492
6 votes
1 answer
226 views

Getting SPDT behavior (with zero quiescent current) from an SPST switch

If you've got an SPDT switch, it's pretty straightforward to use it as a front panel input to some CMOS logic. Even with simple debouncing (no hysteresis, which is acceptable for my purposes), it ...
Nicholas's user avatar
  • 381
3 votes
3 answers
968 views

STM32 input "source" current

I am working on a kind of voltage meter which will be able to measure positive and negative voltages and will have 2 ranges connected to 2 separate pins of STM32. My problem is that at the most ...
Rafal's user avatar
  • 35
-1 votes
1 answer
360 views

Net PWMA_IC3 contains Multiple Input Ports(PWMA,PWMA) [duplicate]

I have to give two different PWM Input to my two Gate driver ICs my design. i have taken two output ports PWMA and PWMB hoping, I will make them 180° apart in phase in programming. 2)I want to give ...
rafi's user avatar
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