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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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2answers
90 views

What is a “current load” on a 24 V input used for?

The MAX14821 (datasheet) is a 24 V IO device that features selectable current loads for use in actuators on the inputs. What would this be used for? It's not just ...
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2answers
73 views

Arduino NANOs sharing input signals and controlling Pixel Ring blowing up

We're a bit stuck on the following problem : We've connected a bunch (18 to be precise) of Arduino NANOs on the same +12V supply and they all share the same PWM output from another device (which goes ...
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2answers
136 views

Audio ADC voltage level SNR question

I keep looking for Audio specific ADCs and the majority of these devices work at low voltages on the analog circuitry (5V for example). Lets say we want to process an higher voltage audio input ...
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1answer
240 views

Combine 1 connector for in and output

To simplify the outside design as much as possible (keeping it simple to use and less expensive) I would like to use just one small 2-pin connector both as output to drive an external led and as 5V ...
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1answer
60 views

Motor/MOSFET Does NOT React To Input On Breadboard

So I have tried so many different variations on breadboard of this circuit but the motor seems to just be powered by the power rail on breadboard. It does not react to any change in the input and ...
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1answer
159 views

Input filter on differential amplifier input

Hi, I need to determine the transfer function Vout/Vin. A traditional differential amplifier transfer function without the 2.2uF on the input side would be G1 = (Z2/Z1)*Vin, where Z2 = (2.2uF // ...
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1answer
99 views

Assigning specific bits of vector to outputs in verilog ucf

When I set up my module, I have code like input signed [7:0] SIGNAL but in the UCF I want to assign each bit individually. Currently my code in the UCF looks ...
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1answer
71 views

Creating a Bluetooth input device for PC

I am currently working on a customized input device. Since the Bluetooth connection from the controller to the PC is not as easy as I thought at first, I decided to use a controller which already ...
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1answer
97 views

Can I use an RC network somehow to allow reading of initial values from jumpers into a micro controller?

I completed a microcontroller project but I want to add a feature where when it starts up, it can read a 4-bit value defined by on-board jumpers (jumper closed = logic low, jumper open = logic high ...
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1answer
473 views

Voltage time graph integration

In a Voltage time graph , at constant current I= 170 amps, voltage=0 to 5,5 and time= 0 to 97 sec and voltage decreases from 5,5 at 0sec to 1,16 at 97 sec, now how can I find the total power ...
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1answer
278 views

Error: illegal Verilog output port specification

I am having problems with my verilog test bench. Every time I try to run it, I get the error in the title above for my four switch registers. I have searched this question numerous times but I cannot ...
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1answer
445 views

How does rated horsepower compare with input power?

If I look at the motor specs, it gives a rated HP: 1 HP @ 2740 RPM & 42.6 Amp, 1.91 ft-lb. My end goal is to get torque as a function of time, but I cannot remove it from the machine. I can ...
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1answer
69 views

Selectively outputting 2 inputs based on a third input

I currently have 2 inputs that can be on or off, they could be 00, 01, 10, or 11. I want to output them only if a third input is active. I figured BJT transistors would do the job, but they seem ...
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0answers
85 views

Signal conditioning for piezo shock-sensor digital input

I have a piezo element glued to a piece of material, and I want to get a digital signal (to drive an interrupt on an Arduino) when something strikes the material. So, there's a certain noise floor on ...
1
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0answers
30 views

Noise on Input Buttons for H-Bridge

I'm constructing an H-Bridge to control a linear actuator. I've done so by using a 2-channel relay module, some buttons, and a ESP32. I do not believe this is an issue of debouncing as I account for ...
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0answers
210 views

Measure input capacitance of I/O pin

I'm looking for a simple laboratory procedure (and required equipment) to measure the input capacitance of each IC I/O pin. Thanks in advance.
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0answers
481 views

Audio input: stereo to mono and filtering DC

I have to get an audio input from a PCB 3.5mm jack and summing right and left channel into one (mono). Then, I have to filter any DC noise from the input. Resistors are 1kOhm each. This, for now, ...
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0answers
128 views

Bell button as input

I got a simple bell system from elcom. It works with 12V AC. When I measure the voltage at the switch it is 1V when not pressed. When I measure the switch sides to the power input of the bell system ...
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0answers
514 views

P-MOSFET based automatic power selector

I have designed the attached power selector circuit, it has a 12V input and a 15V input, and should prioritize the later. It operates in three different scenarios: 1- 12V source R76+R79 divider ...
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0answers
267 views

Should my external analog input be isolated?

I want to build a device that samples analog signals from various measurement instruments via their analog outputs. The instruments have their own power supply, and all devices are powered from the ...
1
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0answers
421 views

button input staying high?

I have a setup with 12 buttons. 10 of them connected to the arduino pins 0, 1, 6, 7, 8, 9 and analog 0, 1, 2, and 3 (these are all configured with pinMode as inputs in the setup-part of the sketch). ...
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0answers
39 views

Allowing different inputs without needing to alter gain every time; a situation for a pre-amp?

The goal I am attempting to make a small diy bookshelf speaker system using 2 16ohm, 25 watt speakers and a 2x25 watt class d amplifier board. If it matters, the amplifier board is a class d amplifier....
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0answers
38 views

Comparator resolving input voltages close to vdd

I have a design problem to solve. The problem statement goes as follows: "Design a clocked comparator resolving input voltages close to vdd dissipating less than 100 uA". What does "resolving input ...
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0answers
47 views

MCP4922 buffer feature

I'm using the MCP4922 as a dac with some different python programs. I am using this python package which has a setVoltage_buffered(channel, value) command. To quote ...
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0answers
125 views

Diode populated keyboard matrix: Wire two separate buttons to the same output?

I have an encoder board for a 16x8 row/column switch matrix. An absolute beginner to electronics but using all of the great online resources for research the best I can. However, occasionally it turns ...
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0answers
43 views

How to decide maximum input current required in linear charging method?

I am using MCP73213 IC for my charging application. I would like to use the maximum capacity of the IC for charging. i.e., 1 ampere charge current during constant current charge cycle.And input ...
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0answers
63 views

Too low voltage on digital input on attiny45

I'm using one of my attiny's pins as digital input. I am using a 2k2 pulldown resistor on the input. I am applying a simple square wave generated by a separate waveform generator. The high state for ...
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0answers
125 views

PIC18 port b interrupt on change is very sensitive

I am running a stepper motor with my PIC18F46K80 microcontroller. This microcontroller offer me the port b interrupt on change feature which basically generates an interrupt if the state the port b ...