Components are the most basic elements in an electronic circuit. Characteristic is that they're in a single package. There are passive and active components, from as simple as a zero -ohm resistor to as complex as a multi-billion transistor IC.

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Component identification 8Y

I hope someone can help I am trying to find out what this component is so I can hopeful replace it The device is a Fluke Network Management device the unit works for about 2-3 minutes depending on ...
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78 views

What is that rotating component for menu?

On some home made electronic circuits, to navigate the menu on LCD screen, a rotating component is used. My first guess was that it was a potentiometer and ADC was used for detection, but it rotates ...
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94 views

Can anyone identify this part?

I am thinking maybe a thermistor? I can't remember where I got it from.
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1answer
176 views

What parts could be labeled XT and be near a Clock of a microcontroller

An ice cube maker stopped working with the symptom that the temperature cycles are getting shorter and shorter. I suspect that the microcontrollers clock is not working properly. I desoldered a part ...
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28 views

“LB” component reference designator

I'm doing a bit of reverse engineering on my Das Keyboard Model S Ultimate. I'm beginning to develop a pretty good understanding of the circuitry, but I am confused about one type of component on the ...
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50 views

Need help identifying a component

I'm doing a repair job on a hard drive logic board which has a blown component. I'm used to dealing with SATA drives where the TVS diodes have suffered damage and therefore taking them out of line / ...
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2answers
41 views

Components with multiple possible values - how to designate on schematic?

Quite often it happens to me that values of resistors or capacitors don't play such a significant role. This is mainly the case with decoupling capacitors and e.g. LED series resistors. Often in ...
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23 views

Type M AC Adapter Pins -Identification Help

Below is the picture from a Belkin Wemo wireless switch teardown for the side that plugs into the wall outlet. The complete teardown is here They have mounted the AC pluggable pins directly on the ...
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1answer
33 views

Alternatives for a UDN2981A

I'm making the circuit depicted here. I already have the shift registers I require, but I can't find any UDN2981A ICs in the stores I have available to me. Unfortunately, I don't have time to wait ...
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3answers
385 views

Thought Process on Designing Circuits

I'm currently in my second year of computer engineering. I've taken circuit analysis courses and have a good general understanding of components, and a little bit of digital design, however, I'm very ...
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1answer
105 views

16x2 LCD Missing Components on the Back [duplicate]

I'm quite new to electronics and am doing it as a hobby. I recently bought a 16x2 LCD display online to use it with an Arduino. When I received it, it noticed that there were a few components missing ...
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2answers
54 views

What do you call a rotary switch that does not have a max turn degree?

Exactly like on the Logitech G35 or Logitech F540; not a rotary switch because those have notches and a physical limit. Instead of turning clockwise, or counter-clockwise, you rotate it 'up' or ...
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1answer
39 views

accelerometers vs gyroscopes

In terms of semiconductor integrated circuits, is there any difference between an accelerometer or a gyroscope? are they the same part? Can I get a IC recommendation for something with 3 axis?
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39 views

PCB Mount Push Button Identification Help

Can anyone help me identify the push button on this PCB board taken from a router? The button is circled in RED and is the one on the backside of the router, used to turn it on/off. I would like to ...
2
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1answer
66 views

Using Electronic Components To Make A Chain Reaction

I've been tasked with creating a Rube Goldberg machine that employs mechanical, chemical, and electric components as a school project. I've got ideas ready for the two former topics, but I'm stuck on ...
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2answers
416 views

Manually removing bulk components from cut tape?

I ordered a bulk quantity of components for experimentation and they were shipped in a cut tape format. I've been removing components individually from the tape but it requires a large amount of ...
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3answers
250 views

What are these electrolytic capacitors?

I am restoring a stereo amplifier circa 1985 (specifically the Technics SU-Z55). Part of that is replacing the electrolytic capacitors on the mainboard due to some audio popping and general age. There ...
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2answers
340 views

Texas instruments component size

I am about to make a pcb footprint for this package: http://www.ti.com/lit/ml/mpds049b/mpds049b.pdf But I am not sure what the two numbers mean, for example at pin 5 that 0,30/0,15. Are these ...
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70 views

Identifying a component on the circuit board of a mobile phone

I need to identify this component which I found on a circuit board inside a mobile phone.
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545 views

Rubber push-button

On lots of electronic devices, such as this Korg drummachine/sampler, there are some soft rubber push buttons. What are they called? (I'm looking for the most common name, so I'll can find them ...
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1answer
76 views

Should I build my own parts for making PCB with eagle or is there a database somewhere?

I'm trying to build a custom PCB for a project I'm working on. I'm building a small robot that navigates using a color sensor and moves using two motors. For logic I'm using an Arduino Nano. My ...
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1answer
56 views

What is that? component identification

What is that? A capacitor or something else? Sorry for the bad quality... It is labeled with: [strange symbol] X50 YKRA
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4answers
2k views

Do ‘wiperless’ potentiometers exist?

Potentiometers are renowned for wearing out (at least in my experience); the little wiper eventually just wears its contact and nolonger has a firm electrical connection. For an audio device, this can ...
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1answer
41 views

Identifying electronic components in Robotale Electronics fans package

I am trying to figure out what the following components. Is the blue component to the left a potentiometer? I would guess that the two black cylindrical objects are buzzers? Is there any way to ...
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74 views

Help Identifying Capacitor

I was given the following capacitor by a spare parts shopkeeper when I asked for a polypropylene capacitor (to be used in RC snubber circuit for a mains load). Can someone confirm this is the right ...
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1answer
116 views

What's the name for this connector?

Recently bought 3.7mAH li-ion batteries on ebay (it's labelled for use with RC toys, but I'm using it for DIY projects). Will need to buy the female adapter. Here are some pics: EDIT: Well then, ...
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1answer
43 views

Automatically distinguish between various two terminal components

I would like to distinguish in the easiest and safest way possible between the following kinds of components attached to my circuit: resistor diode zener diode capacitor polarized capacitor ...
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1answer
686 views

Should I avoid BGA?

I am designing a board and have found that a BGA component is cheaper than the larger footprint. I am curious if I should be reluctant to implement a BGA with regard to extra steps during ...
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24 views

What is the temperature vs time relationship for derating soldering iron dwell time?

Another question here involves someone using a 100 W iron to solder electronic components. This is much hotter than required, in my experience. The soldering specs for ICs are typically ...
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95 views

100W Soldering Iron Risks And Arduino

So I bought a 20W soldering iron a while ago and I found the experience very frustrating as the tip does not get hot enough quickly and when it does melt the solder it gets cold so quick I cant get ...
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2answers
196 views

LED capable of either IR or visible light (not at the same time) [closed]

I'm looking for a type of LED (or some other small light emitter) with two modes: IR light only Visible light, if it also emits IR light here it doesn't really matter Could something like an "RGB ...
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58 views

What is this component (copper package)?

I found the following items in a box of random discrete components. Each item has 3 leads all he same length with a machined copper package cylindrical in shape. They must be pretty valuable items ...
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1answer
51 views

Which MOSFET is best for me? [closed]

I plan on driving a heating coil of about 1.4 Ohms from a 3-4V power source; which gives an current draw of 2.14-2.85 A. So Watts from the following info is 6.42-11.4 W of power. The MCU will output a ...
2
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1answer
58 views

How are Operating Temperature Bands Determined?

Manufacturers like Maxim, Altera, and many more seem to adhere to a commonly defined range of temperatures for applications. For instance, Full military (-55°C to +125°C) Automotive (-40°C to ...
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28 views

How to set the offset for the componets name in Eagle Schematic?

I am using Eagle 7.1.0. In the eagle schematic the componet name is started by default by 1, 2, 3..... How can I create an offset so that it starts from diffent value. for eg offset of 100, should ...
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60 views

Component naming conventions [duplicate]

Some very common parts have standard acronyms on schematics: resistors are usually named R#, capacitors C#, and integrated circuits U#. Is there a typical standard for these names? If I want my BOM ...
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110 views

Find Information On This Component Of Fire Alarm

I have been trying to search for information on the component of a fire alarm that sounds the siren. My goal is to remove the siren and use the power and ground to connect to an arduino. I want the ...
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6answers
2k views

How do you document your hardware design decisions?

How do you document your hardware decisions in the design phase? How do you avoid having to ask yourself the following questions while reviewing an hardware design that you made in the past: Why did ...
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1answer
57 views

How to choose a replacement DC power connector

I am making a replacement logic board for my 3D printer, since the original board kersploded and the manufacturer won't replace it as the printer model is 3 years old (...). The original power supply ...
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4answers
229 views

Is there a sensor that is equivalent to a dry toothpick?

For the non-cooks in the audience the dry toothpick test is used in baking (cakes, banana bread, etc.) to determine when the item is done baking. The procedure is to stick a toothpick into the food, ...
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2answers
55 views

Identity of electronics component needed

I can not figure what the white colored component labeled "5W3K9J" is. The "3K" part seems to indicate a 3K resistor. Could some one please verify this. Thanks giv
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1answer
40 views

Salvaging TMP36 [closed]

Looking to scavenge a tmp36 off of some fried electronics, would anybody have any leads on where to look for this type of sensor. I normally wouldn't mind to buy one, but I live in a pretty remote ...
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2answers
95 views

Use expensive or inexpensive capacitor for decoupling

I'm in the middle of a project to create a small development board using a 100Mhz Cortex M4 MCU and have to buy some decoupling SMT capacitors. I've found the following options: Cheap 10 cent from ...
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1answer
54 views

Optical coupler and splitter difference and explanation

Internally, what is the difference between an optical coupler and an optical splitter. If I have an input A on a 3db splitter, creating outputs B and C, can I send signals on B and C and have them ...
0
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1answer
51 views

How can I make an optical circulator? [closed]

I need to a single mode 1550 optical circulator at my lab. I have a varied supply of components, but no circulator. Any idea how I can make one myself? Perhaps using coupler and isolator? Thanks. -D ...
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3answers
60 views

What is this component? D5SV17

What is this component? Can someone link me to an equivalent replacement, haven't been able to find anything D5SV17
19
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4answers
2k views

Do components have an un-used lifespan?

Lets say for example, that I had a box full of transistors, resistors, capacitors, diodes, leds, this and that, and left it in a cool, average environment for lets say... 50 years. Do these ...
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3answers
123 views

What are these gray boxy components with R50 written on them? (Photo attached)

My motherboard came gradually to a complete death and I'm trying to figure out if one can repair it by fixing some capacitors like in the old days. I went through all the arrays of caps as well as ...
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52 views

Power Inductors in Eagle Software

I want to add the following product into my design in Eagle however I can't find the correct component from the library: ...
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2answers
71 views

Basic 12v LC Filter for Video noise reduction

I'm very new to electronics and I want to build a basic LC Filter with a 12v regulator and below is my basic schematic. Now i'm sure its incorrect but I want to know why and what i'm missing so I can ...