Questions tagged [device]

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2answers
44 views

AC to DC converter device (AC adapter) with adjustable output voltage and adjustable output current [closed]

Is there a device available in the market that can take an input AC from mains and convert it into DC and output it, the output current and voltage must be adjustable. I know there are AC adapters ...
0
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1answer
169 views

Why is a DC to AC inverter called “inverter”?

A device to convert direct current to grid level alternating current seems to be called "inverter". It's typically called like that when used in a solar power system. Why is it called inverter? Does ...
0
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1answer
52 views

How to turn a motor while obtaining the angle it turned?

I need a device where it can turn mechanically, while be able to measure the angle of which the motor turned. One solution I thought about was to connect the motor with potentiometer. However, is ...
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2answers
103 views

What is this device mounted on my wall?

I just noticed this device in my apartment and am wondering if anyone with some electronics knowledge can tell me what it is.
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0answers
6 views

Simultaneous transmission of a D2D user

Can a D2D user (a device) transmit simultaneous different signals to a cellular user and a D2D receiver. If we suppose that the D2D device is equipped with SDR technology and can change their ...
21
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6answers
8k views

Can I disable a battery powered device by reversing half of its batteries?

When I have a device that is powered by two batteries, can I disable it by turning one battery around? For illustration, the purpose is to leave batteries in the device for storage, but it does not ...
2
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1answer
99 views

What device can switch ON and OFF different pads independently?

I am looking for a device, but I am not sure what I need: maybe you have ideas. I have a power supply connected to 16 electrodes. What I need is a device (see picture) between the power supply and the ...
1
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2answers
142 views

SMD Device and manufacturer ID markings S2

I have a SMD device that I am am trying to identify. Can anyone point me to a manufacturer? Probably a resistor but I am not sure. Any help would be appreciated. The scale bar in the picture is not ...
2
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1answer
87 views

General dimensions and recommendations for a USB dongle

I'm trying to create a device that connects via USB and sits in a users computers USB socket at all times, and I'm unsure of what the general dimension requirements will be. Ideally, this device ...
4
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3answers
2k views

Why are “square law” devices important?

In the literature, I often see the notion of square law devices. Why are these devices important, to the extent that they have their own characterization as square law device? In what context does ...
0
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1answer
39 views

Connector identification (multipin connector for automotive touchscreen)

This connector is from a device connected to the touch screen in the car. This device is chinese, so I'm having trouble locating information about any part number or name. The connector has 4 wires ...
0
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3answers
245 views

What exactly are low speed devices? [closed]

The definition of I2C is - "A multi-master multi-slave serial bus used for communication between low-speed devices". However, I have been searching the web for a concrete explanation for this but ...
0
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1answer
45 views

ADuC845 Eval. Board input signal not reading?

...
0
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1answer
509 views

The forward voltage Vf of a diode

I want to know about the forward voltage \$V_{f}\$ parameter of a diode device, given an I-V charateristic curve and in ambient temperature. What is the criteria to define the \$V_{f}\$ for any diode? ...
0
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1answer
80 views

How can I power a device that requires 5-7V and 2.5-6 mA with what I have?

I have voltage pins on one device that outputs 6.23V DC and 70 mA DC. What type of circuit do I have to build that can power up another device that requires 5-7V DC and 2.5-6 mA DC using my 6.23 V ...
0
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3answers
108 views

How to calculate the voltage used to light up the emergency light from the given details of manual..?

I have an emergency light device which is given by a small manual back side of it with some electrical specification. They are: Voltage: AC90-240V 50-60Hz Current: 0.1A Power: 18W Can I ...
4
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3answers
370 views

Good equipments to measure current consumption for IoT devices [closed]

I was asked to bought some equipment to measure the current consumption for the IoT devices. The company is a startup and has a limited budget for this (let's say less than 5k$). I'm looking for an ...
0
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1answer
26 views

Connecting power cable to device without enabled power supply = battery low?

Example: Camera or Discman (XP-EV500) with DC power cable: If I connect the power cable to the device, but the charger is switched off or not connected to the wall, then the camera/discman indicates ...
1
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1answer
279 views

AC mains wire finder + live wire equivalent circuit [duplicate]

I'm talking about devices for tracing hidden AC mains wires in walls like this one: https://www.ebay.com/itm/3-in-1-LCD-Wall-Detector-Stud-Center-Finder-AC-Live-Wire-Metal-Detector-Scanner-/...
1
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3answers
135 views

How to make a self-recognition socket for diferent connectors (sensors)

I am working on an electronic device, to which will be a lot of sensors on wires connected to a panel with sockets. Is there any option that will recognise which sensor is connected to a which socket? ...
0
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1answer
138 views

How to spot different electronic devices? [closed]

Recently my university has changed traditional counter meters into intelligent ones where they cut the power for illegal devices. At first as the rules say, the illegal ones are those with power usage ...
4
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1answer
1k views

Is there a preferred encryption scheme for encrypting firmware builds on external flash?

I have a product that is going to be deployed in large numbers, and I want to maximize the trouble that someone is going to go through to reverse engineer it (a high level of security). It is an ...
0
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2answers
4k views

What's the difference between the term 'Device' and 'Machine'? [closed]

Limiting the question only to the electrical domain. Calling AC machines as ac device mean the same or there is a difference in the terminology.
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2answers
165 views

Do hardware designer consider software(Firmware or drivers) while designing hardware? [closed]

I like to know what's the procedure of building a new device? Foe example a hardware designer decides to make a new laptop that can run Windows or Linux, or someone wants to build a new Android device,...
3
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4answers
720 views

Is it possible to power an arduino-like device from soil?

I am exploring some IoT applications I could work on. One of them is a sensor that does some periodical measurements of soil and saves it into inner memory or broadcasts over low-power radio channel. ...
-2
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3answers
247 views

SPI to UART Convert without MCU

I want to make a pcb, there will be the device with spi and i only need to read it's registers and send on bluetooth's rx pin. It's a little bit expensive to use microcontroller to just read registers....
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2answers
310 views

Difference between electronic component and passive component

I am confused about the difference between a passive component like resistor and an electronic device like diode. I know about their functionality. But my question is why resistor is not called an ...
-1
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2answers
88 views

How can i record the rpm of a small spinning object with out the use of a hand held tool such as a laser.

How do I measure the revolutions of a moving object as it rotates around. Imagine a fan blade, I need to measure the rpm of the fan without using an outside tool such as a laser rpm reader. Ideally ...
1
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5answers
328 views

Why would I need a low-dropout regulator?

I am creating a device utilizing multiple components, all of which have an acceptable operaating voltage of about 5 V. One component has an operating voltage of about 6 V. I am looking at relevant ...
1
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1answer
289 views

How to create device variant with different pin count in Eagle?

I have a part that has 2 variants SOT-23-3 and SOT-23-5. Both have different schematics as one has 3 pins and other 5 pins. Package is also different due to difference in pin count. The problem is ...
2
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3answers
2k views

Do electronic devices consume more power when the ambient temperature is cold?

Just a casual observation: when it is winter, my personal devices such as cellphone and Ipad consume power more quickly compared when it is in the summer. But this could simply because of change is ...
1
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3answers
516 views

How can cold temperature (refrigerator, air con) fix a broken electronic device?

I had an air con remote control that wasn't working at all. But at some point I noticed that when I turn on the air con manually and the room gets cooler, the remote control works as expected. I ...
1
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1answer
481 views

Will a 24/7 plugged-in power cable kill my laptop's battery? [closed]

I'm using a Lenovo Y50-70 and Conversation mode is always turned on (plugged-in, not charging mode). Specifically, my question is: Will it damage the battery (or the laptop) if I leave the power ...
0
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1answer
669 views

get PWM values via i2c

-short answer: using an arduino does the Job- "Reading PWM Receiver Signal Using Arduino": https://www.youtube.com/watch?v=ncBDvcbY1l4 I have just started controlling electronic circuits with ...
-2
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1answer
92 views

What is this white device? [closed]

I know this question might sound a little silly and this is probably not the best site to ask, but I would really appreciate any answer. My neighbours installed this device just opposite to windows of ...
1
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1answer
1k views

Eagle CAD Multiple individual parts in one device

Good day, I am trying to place multiple parts in one device. My use case is a foot print for a XBee chip. The device has two identical 10 pin 2mm SMT headers (NPPN101BFLC-RC: digikey link). There is ...
0
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1answer
77 views

What company and/or government permits/licenses are required when selling an electrical device in the United States?

Are there specific licenses that need to be on hand, or any permits that need to be signed by various parties, in the United States, when an electronic device is sold? If it's easier, if the device ...
-2
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1answer
622 views

how do you typically tie the address pins and WP pin of I2C device? Do these lines need a pull-up/down resistor or just tied directly [closed]

how do you typically tie the address pins and WP pin of I2C device? Do these lines need a pull-up/down resistor or just tied directly.
0
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1answer
6k views

1 Device, 2 Power sources?

I was curious about this. I've searched other similar questions but they weren't quite the same. One mentioned the use of diodes but I would like to know if this would work first before adding ...
0
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1answer
141 views

Can someone help to find / create / add a device in Eagle Library?

I want to use FSL176MRT a integrated Pulse Width Modulation (PWM) controller and SenseFET IC in my SMPS's PCB design in EAGLE. It is not available in any library. Its a 6 lead TO-220 package device ...
7
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1answer
543 views

At the microscopic level, what exactly forces us into the “dark silicon” (i.e., the mismatch between transistor scaling and voltage scaling) problem?

I've read that if you fix the TDP of a chip, you cannot use all of the transistors simultaneously any longer. This leads me to believe that each transistor requires the same power as in previous nodes ...
3
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3answers
374 views

Scanning/photocopying vs. photographing the material

Why do scanners and photocopies scan the material? Couldn't they just have a digital camera + light behind the glass? A lens with fixed focus would suffice, since the sheet of paper would always be ...
1
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1answer
780 views

What is the purpose of a T-gate or H-gate in a body-contacted SOI MOSFET?

I've been banging my head against the wall with this question for hours. There are many examples of T-gate and H-gate structures that I've found, but I can't for the life of me figure out why the gate ...
1
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1answer
570 views

Why is erasure much slower than write for (NAND) flash?

Typical block erasure time for NAND is on the order of milliseconds which is one order of magnitude higher than write. Both of them are based on FN current. Why? Thank you!
0
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2answers
144 views

Voltage regulator question

I have made a portable device charger with a 5 volt voltage regulator(7805-TO220 package),a 9 volt battery and a few capacitors.The problem is,when I connect the charger to a certain device(whose ...
-2
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1answer
240 views

wireless device to send data with low latency up to 1km

I need a device about the size of a phone with 2 buttons, the device will be used to let a server know the outcome of an event (2 possible outcomes). A mobile phone app would be the obvious choice but ...
13
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4answers
3k views

Inductive and capacitive terms

What it means when we say that some component or device is inductive or capacitive? How these terms are related to capacitors and inductors?
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2answers
2k views

Detect if usb device is connected on the other side of the cable

Is it possible to detect that there is a device connected on the other side of the cable without using any current sensor? I simply want my arduino to do something when i plug my phone to charger. I ...
1
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1answer
194 views

Are drivers and libraries the same?

Can driver for some device (for example LCD display), also be called library (a set of functions for work with)? If not what is the difference, and what term is used for what?
0
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1answer
677 views

How is water resistance of a device measured?

This question has relation to physics as well, but since it is electronic related, it is here. I was watching a video that is testing the water resistance of Apple Watch. They say, at 3 feet the ...