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Questions tagged [input]

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

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Confusion in deciding a voltage regulator's input output capacitor types

As a part of a PCB, I want to use this AMS1117-3.3 voltage regulator with 22uF input and output capacitors as follows: As for the exact part for the capacitors, I was planning to use this X7R ...
user1245's user avatar
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0 votes
0 answers
24 views

Protection still adequate?

I'm trying to protect an analog input (that goes through a MUX and a buffering op amp). Expected input frequency is less than 10 Hz. I would like to go from the top schema to the bottom one. LDR/...
user1532080's user avatar
0 votes
2 answers
85 views

Circuit that offsets input voltage to exactly 0 V

I am looking for a (op amp) circuit to offset \$f(x)= \log(x)\$ always to zero. More comprehensible is the explanation on the x-y plot below. Basically, it is possible to offset the voltage with an ...
Andriy S's user avatar
0 votes
1 answer
43 views

Bulletproof automotive drycontact input switch with constant current opto driver

Please comment on this circuit. I want to make sure a push button input SW? is as robust as possible before it goes into my processor after the U12A buffer.
Pieter Potgieter's user avatar
0 votes
2 answers
58 views

What happens if misconfigured input GPIO delivers 3.3V if it is connected to 3.3V to detect high?

Let's say I have GPIO0 on an ESP32 which is configured as input pin using an external 4.7K Ohm pull-down resistor to ground. Default state therefore is low. When I ...
Tintenfisch's user avatar
0 votes
0 answers
38 views

Difference between Vid and Vidr

I have two different operational amplifiers datasheets with absolute maximum ratings. The TI LM358DR has a differential input voltage specification (Vid) of -32 V to 32 V, whereas the OnSemi LM358DR2G ...
Stefan Wyss's user avatar
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0 votes
1 answer
27 views

Effect of low pass filter in ADC when the pin direction is changed from input to output

Consider a circuit to measure ADC : The ADC pin is changed from input to output every 5 seconds and the pin is read for analog value. Every 5 seconds it is made high for 100 ms, low for 100ms and ...
GURAJAPU RAJA SUMANT's user avatar
1 vote
1 answer
60 views

Input ranges exceeding rails in opamps & comparators

With opamps & comparators datasheets I've seen, it was typical to show in absolute maximum ratings values such as: $$V_{SUPPLY} (V_{DD} \; to \; V_{SS}): \quad 12V$$ $$V_{DIF\_IN} (V_{-IN} \; to \;...
Tempus Nomen's user avatar
0 votes
1 answer
43 views

Terms for pressure sensitive pads

I'm working on a project that needs pressure sensitive input, and I'm a bit lost on the lingo for parts. What would be a good search term to look for parts that describes a pressure sensitive pad that ...
Ombrezz's user avatar
  • 173
1 vote
1 answer
55 views

Reusing an output in Falstad

I'm simulating a logic circuit in Falstad and a particular output X is used multiple times in the circuit. Can I take input as X without drawing many wires from X?
Shub's user avatar
  • 129
1 vote
1 answer
30 views

STM32G030K6 24V on input pins with internal protection diodes

I have 24VDC signal and I want STM32G030K6 MCU to detect it (state low/high). I know this MCU has internal diodes on some pins, connected from inputs to VDD and max positive injected current is 5mA. ...
Mietek's user avatar
  • 11
0 votes
1 answer
31 views

Max voltage per pin when measuring differential voltage with MCP3422

Im measuring differential voltage over a 1 Ohm (shunt) resistor at max 1 Amp, load voltage is 12V DC using one of the channels on MCP3422. MCP3422 is powered from 3v3 DC. The datasheet https://ww1....
MarcelH's user avatar
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0 votes
1 answer
35 views

What ESC matches criteria? [closed]

Is there any ESC, that takes PWM from an Arduino as an input, has three wires for three motor phases and has three wires for the hall effect sensors? Does this match my criteria Product ?
user334991's user avatar
2 votes
1 answer
69 views

IC 74HC08 can the output drive the input without destroying it? [closed]

i made a circuit with a 74HC08 and i wanted that when the output is high(1Y) it would take over contact (1B) with a led between it .and the input B connected to ground with a 20K resistor it works ...
jokertje1's user avatar
0 votes
3 answers
97 views

Modify headphone jack to not mute speakers when plugged in (Yamaha HS4)

I have a set of speakers with an additional stereo headphone output on the front. As it is now, when the headphones are plugged in, the speaker mutes, giving output to the headphones alone. I want to ...
Noah Taher's user avatar
0 votes
1 answer
47 views

How to increase the Atmega32A input output pins

I’m using ATmega32A to control a system which have a 30 outputs and 30 inputs. The issue is that the ATmega32A have only 32 DIO pin which can be use as input output pins. So how can I increase the ...
abdalla zakaria's user avatar
0 votes
1 answer
32 views

Led blanking while the DIO_Read is LOW and work well while DIO_Read is HIGH

I'm trying to read digital 24v in MCU so I used a voltage regulator to step it down to 5v then I got the 5v to pull down resistor with a transistor like that then I get the V out to the MCU pin which ...
abdalla zakaria's user avatar
-2 votes
1 answer
52 views

Polarity free dc circuit module [closed]

I am looking for a chip or a circuit module in which the output will be dc voltage in certain pins positive + and negative - , no matter how the dc input is connected, normal +- or or reverse -+. The ...
Stefanos Konstantopoulos's user avatar
1 vote
2 answers
58 views

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
  • 11
0 votes
1 answer
58 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
174 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
48 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
0 votes
1 answer
72 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
0 votes
2 answers
47 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
0 votes
0 answers
41 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
0 votes
0 answers
41 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
142 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
  • 43
1 vote
0 answers
82 views

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
229 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
399 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
145 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
  • 67
1 vote
1 answer
50 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
93 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 ...
user avatar
0 votes
1 answer
79 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
0 votes
0 answers
125 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
0 votes
1 answer
246 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
106 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
90 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
281 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
  • 407
1 vote
3 answers
468 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
514 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 ...
user avatar
0 votes
1 answer
131 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
  • 1
1 vote
1 answer
357 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
253 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
277 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
712 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
54 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
  • 33
0 votes
1 answer
102 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
  • 11
0 votes
1 answer
149 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
  • 1,139
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

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