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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54 views

Passive components swapping and replacement

I am trying to writte a small note for our staff when they purchase components. Quite often some resistors, capacitor, inductor, diode and transistor (NPN and MOSFTET) may not be availble on the ...
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27 views

Reed relay vs photoMOS relay [on hold]

I would like to get some help from you about the advantage/disadvantage of reed relay vs photoMOS relay. Thank you! JT The following would have been an answer if the question had not been closed ...
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29 views

Help for identifying pinout of unknown mp3 chip

I'm trying to use a cheap mp3 player to play song using Arduino, I couldn't find the datasheet of the main chip but I made some progress identifying some pins. ...
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0answers
19 views

Design of custom package in ARES to make custom device in ISIS will not work

I've been trying to construct a package in ARES that I can append to custom made device in ISIS. It's version 7.6 SP0 for both. To make clear immediately: there is no diagram of a circuit or an ...
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3answers
264 views

What are the uses of Lugs?

I've seen various projects using copper lugs and compressing them with bench vices but what is the actually use? Can't you just use wires without the lugs?
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1answer
35 views

Input and output relation of ACS712 Hall effect current Sensor

ACS712 works by the use of the hall effect principle. When i went through the datasheet, i found out that the relation between input current and output voltage is varied largely ie. 66 mv/A to 185 mv/...
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1answer
22 views

How to hide/delete the symbol pin types (named as pas/sup) from the eagle schematics?

Hi there, I was trying to do something and not sure what I did without knowingly those small green circles along with names has appeared on ever pin of all the components I had in the schematics. ...
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3answers
79 views

Best way to get components for a new electronics lab [closed]

I recently joined a lab that is still in the process of getting set up. Our approach to acquiring electrical components (e.g. resistors, caps, opamps, etc.) so far has been to just wait until we ...
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1answer
65 views

120v power supply section 220v adaptation

I'm building a very simple tube overdrive, power supply section of the schematic can be seen above. as you can see the circuit has been designed for 120v. I will be dealing with 220v instead of 120v, ...
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0answers
59 views

What kind of DC motor should I get for raising my blinds? [closed]

I have large blinds that cover sliding glass doors in my condo. Unfortunately, the draw string to raise / lower them pops out regularly. I've decided I want to automate the raising / lowering with a ...
5
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1answer
84 views

Date code in components marking

In some datasheet (two example in links below) I see only this information, about production date, in marking code explanation: Date code (A : 1997.1) If there ...
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1answer
36 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 ...
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1answer
26 views

Read Thyristor(Triac) specification

I have this Triac which I believe is failed because of a hight current we had in the house. The varistors that were next to it were totally burned. I am trying to buy some online, but I really don't ...
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0answers
20 views

Altium Import components parameters

When I import components parameters using the Supplier Search function to import parameters directly into components who are in the schematic, Altium automatically insert the Part number inside the ...
2
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2answers
81 views

Component choice and Swap

I have two questions in one: I have collected some schematic from datasheet from manufacturer of chip. Inside the datasheet there are the following circuit shown below. 1./ The manufacturer don't ...
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1answer
35 views

Help identify a component on VS-TY2662-V1 LCD driver board

I just received what seems to be a faulty driver board for a 7inch LCD touchscreen. As soon as I opened the package, one of the components fell out of the static-protection bag. I'm now trying to ...
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1answer
85 views

Can you tell me what is this component

I found this electronic component in the road, but I can't tell what it's tend to be because I'm not an electronics guy, can you please tell me what is it ? Thank you in advance
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1answer
41 views

No datasheet for SunFounder ADXL345 - can I use a datasheet for the same part number from a different manufacturer?

I'm just getting started with electronics (with Arduino) and have bought this SunFounder accelerometer with part code ADXL345 from Amazon. My problem is I can't find a datasheet anywhere from ...
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2answers
93 views

Cumulative LEDs

For a better explanation let's think something like an equalizer bar Think one of these bars. The coloumn has 16levels from bottom to top. If the level 10's led need to light up then, the all levels ...
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1answer
72 views

Is there a component inside the stun gun that limits current?

Stun guns in electronic terms are basically boost converters that allow voltage to boost to a very high voltage. Using only 9V battery, it would boost the voltage to million of volts. Where does the ...
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2answers
55 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
409 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
74 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 ...
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0answers
52 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 ...
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0answers
15 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 ...
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3answers
124 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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1answer
38 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
53 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 ...
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1answer
69 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?
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1answer
59 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
76 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.
5
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2answers
403 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 results....
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3answers
66 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 supply)...
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0answers
49 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
337 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
52 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
2k 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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5answers
107 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? ...
5
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3answers
145 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
42 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, [-2,-1,...
0
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0answers
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
votes
2answers
74 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
votes
3answers
61 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" rated....
11
votes
5answers
897 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, ...
1
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1answer
222 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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1answer
38 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
votes
3answers
255 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 ...