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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Where should I go from here? [on hold]

To explain; I study electronics at my university and I've just finished for the year. While there I was taught the basics, circuit analysis (loop/nodal/superposition, thevenin's and norton's theorem), ...
1
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2answers
47 views

Reference Designator “N”

I have a component on a PCB we are analyzing to identify components. While we have identified mostly everything on the board, there are three components labelled with the reference designator "N". I ...
5
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2answers
386 views

What's a potentiometer with four terminals in this schematic?

I'm reading the datasheet for a TDA2005 IC. In it, there's a application circuit schematic with two potentiometers that have a fourth terminal in it. See below: The components I'm talking about is ...
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3answers
62 views

Using 220v transformer on 110v input

I've been looking for 115v primary 9v secondary 3.2va power rating PCB transformer and couldn't find any to replace the one that was fried. All I find is dual one, instead for example 4 pins it has 8 ...
0
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0answers
49 views

how to open a lock using RFID?

I want to use RFID to open a lock with an Arduino and I was searching in the internet about the components that will help me do that. My question is : do I need a servo motor or a relay to open the ...
0
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2answers
61 views

Circuit components for fried coffee pot [closed]

Edited: Added some real pictures of the motherboard. I have this motherboard that was fried from having a power down in town. I find these three components are burnt, I one of them I really can't ...
0
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0answers
12 views

How would I add pre-existing components to the user database from the master database in Multisim?

So in Multisim there's a lot of components. Of these thousands of components there are about 50 or so that I use actively. So after a little bit of exploration I found that there was 3 databases. The ...
3
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3answers
123 views

Unknown (custom?) part

The photo below shows a part that I am trying to find a specification for. I suspect that it is a microcontroller, and is part of a larger device that is essentially a timer. It clearly bears the ...
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0answers
22 views

No hotspot in a component created in Altium

I have added a component to an SCH library in Altium. I have just drawn the component (just the schematic and not the footprint!) and added to it a model that I found on the TI website. I just need ...
2
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1answer
33 views

Sub-circuit in Altium

I am working on Altium Designer and I would like to create a subcircuit from existing components. To be more clear, I want to be able to create a new part from a schematic I already draw. For a very ...
0
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1answer
65 views

Schematic components

Does anyone know the names of these two components labeled 50 Hz and 60 Hz, so I can find them in proteus program?
1
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1answer
41 views

What Electronic Component Marking On A Circuit Board Is Designated For BF?

While looking at ESR values for capacitors on a failed Samsung refrigerator circuit board I was looking over other components for telltale signs of failure and spotted an unusual component that I ...
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1answer
70 views

What electronic component is this? - sensor part of particulate matter sensor [closed]

What electronic component is this? This is a part of a laser sensor which measures particulates.
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391 views

Searching for electronics components in mouser.com

I'm trying to get into electronics and read that mouser is a good place. I wanted to buy a couple of leds, just like this one. But searching for "led" or "simple led" yields pages and pages of ...
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3answers
60 views

Capacitors discharging

I am a beginner at electronics so excuse my rather simplistic question. I would like to know regarding capacitors, if a capacitor is connected in a series circuit (as shown below but with a dc ...
1
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0answers
46 views

an LM13700 can be configured as a “floating” voltage controlled resistor ; How resistor-like is it?

I want to use an LM13700 as a voltage controlled resistor, and I want it to act like a rheostat. When will it act non-linearly? The description of this circuit is on page 15 of the datasheet, and ...
3
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2answers
322 views

Raise SMD parts offset above PCB

To mount an MPXV7002 pressure sensor (SMT) on a PCB, it has to be raised above the board by about 3 mm to allow the plastic tubing to be attached to the pressure ports. This is an 8-pin device that ...
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3answers
69 views

What is that component?

Hello I've got this Component with an arduino pack and I want to know what it is. It only has one label on it "HDX" I googled it but didn't find any thing it has also one short golden leg and a ...
0
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1answer
45 views

MC68000 Modern Equivalent (or can/should I use NRND/EOL chips)

I am designing a SBC that will feature the Motorola 68000 (or one of its descendants) but am having trouble finding new chips. The only chips that I have been able to find on Mouser or Digi-Key are ...
10
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2answers
1k views

Why would I use 2N3904 instead of 2N4401?

2N3904 and 2N4401 appear to be very comparable parts in all specs. 2N4401 has a higher current rating, but otherwise they look to be about the same in price and everything else. Obviously it's ...
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26 views

41-pin CSP5 package specification?

I am trying to make a part that uses a, 41-pin CSP5 package, but can't find any info regarding its specification, or any dimensions, any help appreciated.
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5answers
96 views

Switching power supply only works when warm

Update With the multimeter and a steady hand, I've found the 3843B PWM controller Vcc pin is 12V when the supply is on, and 8.2V when it is plugged in but cold. Datasheet says it needs 8.4V Vcc to ...
0
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1answer
39 views

What do i need to look out for when selecting components? [closed]

I'm pretty new to electronics as a hobby - been picking it up on and off for the past 2 years or so - and there's always one thing i always stumble and doubt myself on, how do i select components? ...
4
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3answers
143 views

Are there gaps in the 2% resistor standard values?

I was reading the Wikipedia entry for E-series resistor values, and I decided to graph the values on a log plot. The plot shows the values nearly evenly spaced, which makes sense because adjacent ...
0
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1answer
41 views

Need Basic component/circuit that if given the input volatage [-2,-1,0,1,2] will output, [-1,0,0,0,1]

as a hobby I'm working on a ternary computer, using very basic building block. in order to implement an half adder, I need a very basic component/circuit, that take the following input voltage, ...
0
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55 views

what is the name of this LCD Jack?

I have a PCM-9577 rev A.2 motherboard, with a 40 pin "LCD" connector. I am trying to replace the connector circled in red with an LCD to VGA adapter, so that I do not need to get another one of ...
3
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2answers
71 views

Identifying components in an electric fencer output board

I'm just looking at an electric fencer output board at the moment, it's not plugged into the fencer, I'm just testing the components are it has a fault. I'm having trouble with these here though, they ...
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1answer
90 views

Help identify part

Anyone know what this is, I need the particular part name. The photo is of an audio amplifier:
3
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3answers
59 views

MIL-Spec Differences

Recently I was following an online project guide, and ordered many components online. One of the components, a 0.10uF capacitor with 50V rating, returned some results which said they were "MIL" ...
11
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5answers
863 views

What's cheaper & faster for my lab, keep a stock of electronics components or order? [closed]

We are four electronic engineers working in a company, and we have a lab, I think we have a logistic issue with our components, this might be a basic study case: We have few racks with resistors, ...
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1answer
219 views

What is this component on electric water-pump controller?

This is an electric water-pump controller There is a component that I don't know what it is. it's marked as "RD". look: In your opinion What would it be?
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49 views

finding a voltage controllable resistor to replace 1M potentiometer in audio application

I want to replace a 1M potentiometer with some kind of remotely controllable solution. The potentiometer handles an audio signal of \$\pm9V\$. Zippering is unnacceptable in this application, so ...
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30 views

meaning of the reference of electronics component [duplicate]

i'm always curious when i read "BC547" or "BUZ71A" or "2N4004", but what does it means "BC","BUZ","2N" ? i want to learn there meaning and how and why the maker choose this name. i can't search in ...
0
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1answer
37 views

TVS unintentionally shorting on USB?

I had a very peculiar situation on a PCB I am working on, and the only possibility I can think of is that my assembler installed the wrong chip on my board. I'd like to present it to the forum to see ...
4
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3answers
248 views

How to know the part number that I want? [closed]

I am new to electronics. But I got to know how to make circuit and make it work. Problem I am facing, I need to know the part number based on my requirement. Suppose if I want to buy an AND gate ...
2
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1answer
166 views

Looking for a male USB B connector [closed]

I'm trying to get a connector that will connect another product as a sort of 'daughter board'. This thing has the old USB B connector on it and what I'd like to do is back it up to this connector and ...
0
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1answer
61 views

Altium Generic components

I am new to Altium designer and had a question. For all of their generic component libraries from the Altium vault they only have 0603(1608 Metric), 0805(2012 Metric) etc. From looking at ...
0
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1answer
64 views

Is wire-wrap for components, or just special boards and pins?

Are common components suitable for wire-wrap connections? Or is wire wrap designed for a special type of pin? I just checked some resistors and diodes and found them ranging from .5-.7mm, and the ...
0
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1answer
49 views

Understanding a debit card reader through RFID

I work in the bus industry and today I went to a meeting that gave me an idea for a project. In order to start the project, I need to gather a technical perspective of how the product that I saw in ...
10
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1answer
488 views

Potentiometer vs Varistor

What is the main difference between and potentiometer, rheostat and a varistor? And how do the application of the three in a circuit differ? Or to be more concise, in a variable power supply why ...
4
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1answer
85 views

What's the typical way to manage components for a team in Altium? Component libraries in a vault? SVN Database? Other?

I'm an EE for a growing company, and I'm looking for what's typical to manage components across multiple designs. When I say growing, I mean that there used to be one EE, as of last year I got added ...
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2answers
97 views

PCB Design Finding Part Equivalents

I'm currently designing a PCB in Eagle to build my own Nixie Clock. I know kits exist but I'm trying to do this from the ground up to get the experience. Nixie Tubes require 180V and I'm trying to ...
4
votes
1answer
71 views

What component has the reference designator RY?

I found a component designated RY8015 which I don't recognize, shown on the photo below on an LCD TV PCB (the bulb-like part next to a green radial varistor). What is it called? What is its design ...
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2answers
103 views

Which component is this?

I salvaged a few components like that from some old ISA Ethernet card (10Base2 + 10BaseT combos), many years ago. If my memory doesn't fail, those boards were replaced by 1995, I kept them, and ...
5
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2answers
95 views

How to source this hook socket

I've been trying to find the name, part number, manufacturer and some vendor for this hook socket. I'm not even 100% sure that is what it is called. Do you have any information about it? Anything ...
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1answer
42 views

Miniture bluetooth enabled accelerometer with API or SDK [closed]

I'm getting into electronics as a hobby. For my first hobby project I want to build something like a super simple fitbit. To achieve this I need a bluetooth enabled accelerometer. I've had a look at ...
0
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2answers
51 views

Question on LM2577

I have a hard time fully understanding the datasheet of LM2577. I bought this product that has a LM2577 in it and the specifications indicated by the seller that it can have a maximum output current ...
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2answers
77 views

What component is a VZ reference designator for

The board I'm looking at is a modem board from a fax machine. There are 2 identical components labeled VZ1 and VZ2 on the board, both components have F175 on the face and have 2 SMC leads. One of ...
3
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2answers
86 views

what kind of tape is used in electronic devices

I repair quite a few devices and one thing that bothers me is that when I remove some of the tape pieces they never go back down right. I was looking for some replacement tape and didn't know what to ...
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2answers
36 views

Axial component identification

Please help identify this component. It is cylindrical, with an axial configuration, and no obvious indication of which end is which. The writing on it is: K25U 104M 50V 8502 The 104M makes me think ...