Questions tagged [input]
Something put into a system or expended in its operation to achieve output or a result
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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 ...
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1
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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:
...
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3
answers
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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 ...
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3
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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 ...
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1
answer
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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 ...
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1
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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 ...
user340506
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1
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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 ...
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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&...
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157
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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 ...
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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?
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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 ...
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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? ...
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3
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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).
...
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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 ...
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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 ...
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1
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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 ...
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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.
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1
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I can't get output voltage from flip-flop in PSpice
I'm simulation a flip-flop in PSpice, but it doesn't show an output voltage.
This is testing a flip-flop; look at Q output. It shows X(undefine). I don't know if I'm missing anything in PSpice.
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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?
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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 ...
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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 ...
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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:
...
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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 ...
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2
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120
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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 ...
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6
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254
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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 ...
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71
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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 ...
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2
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471
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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 ...
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1
answer
575
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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 ...
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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 ...
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2
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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 ...
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4
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246
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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 ...
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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,...
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1
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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 ...
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2
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72
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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?
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1
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297
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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,...
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1
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351
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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,...
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1
answer
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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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3
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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 ...
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votes
1
answer
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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 ...
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3
votes
3
answers
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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 ...
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1
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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 ...
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Query regarding MAX20480DATEJ/VY+ voltage monitor
I'm using a MAX20480DATEJ/VY+ voltage monitor for my design. Out of four inputs, I prefer to set IN1 2.5V at the same time for testing purposes. When I'm running my command, I'm constantly getting a ...
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If a device's electrical requirements give a voltage range and fixed current, does the current limit assume the lowest input voltage? [duplicate]
I am working with some small devices and checking input power requirements. Many of the standard labels look like this:
Input Power: 100 - 240 VAC, 50-60Hz, 2.5A
I am trying to determine how much ...
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1
answer
122
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How to store bits asynchronously without clock resetting all bits?
I am working on a circuit that has 8 buttons that need to hold the value once pressed.
I'm currently using a 8 bit flip flop (74LS273 in the diagram).
The problem is that all bits get reset on the ...
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1
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I am adding 1 ohm resistor with a coil in series and an connecting to a 25 W DC source. How to choose the correct resistor of 1 ohm?
I am adding 1 ohm resistor with a coil in series and connecting to a 25 W DC source. How to choose the correct resistor of 1 ohm?
Is 1 ohm, 25W resistor is OK for this circuit?
Please help.
Edit from ...
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Two digital pins for reading buttons, writing to RST
I have an ESP8266 with two buttons connected to pulled-up GPIO4 and GPIO14. The buttons pull the signal down if pressed. I want to reset the microcontroller on every raising edge. I thought about ...
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1
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PIC16F886 and Switch Setup with Diode
I would like to make a simple embedded program that will Display what is happening on and LCD screen. When Switch One is pressed, it displays "Switch One". When Switch 2 is pressed it ...
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2
answers
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No Input to Open Drain Buffer, yet Output Drives Low?
I'm kind of stuck with understanding why the output of an open drain buffer is going low when there is nothing connected to the input. We're using the SN74LVC1G07. Truth table states that if the input ...
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1
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Why is the push button state taking too long to in the program?
I wired up the circuit using a pull down resistor of 10KOhm according the schematic provided. I'm using Jetson Nano (MCU).The push button (DF Robot PB) has three wires, +ve,-ve, and signal, pin 1,pin ...
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0
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42
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Consequences of having an external signal connected to an output of a LVDS Receiver?
I am trying to debug an issue with an LVDS receiver on a fellow colleagues board. They are using an LVDS differential pair from an FPGA to control a reset line on a MPU on their board. For debugging ...
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