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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pcb and component placing [on hold]

I'm having an hard time finding a supplier for pcb AND component placing. I've already done the schematic, I need a company that can produce large quantities of pcb with also the component mounted on ...
6
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2answers
137 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
35 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
0
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1answer
33 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 ...
0
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2answers
61 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 ...
0
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1answer
40 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
42 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 ...
0
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3answers
54 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
0
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0answers
28 views

Creating rectangular components in MultiSim? [closed]

I'm looking to create a rectangular box to signify a component, akin to this in Multisim. The rectangle dimension and pins on each side are to be user defined, is this possible?
18
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4answers
1k 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 ...
0
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3answers
107 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 ...
0
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0answers
34 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: ...
0
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2answers
43 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 ...
0
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2answers
68 views

Can I feed lower than rated voltage?

I'm poking around on eBay for some capacitors to use in circuits which I'm working on and see that they have a rated voltage. After some quick research, I found that going over the rated voltage of a ...
2
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2answers
202 views

How can I tell if a given MOSFET can be fully driven by 5V TTL high signal? (what should I look for on the datasheet?)

How can I tell (by reading the datasheet) if a specific MOSFET can be turned fully on (with the minimum drop) with simply 5V on the gate? (assuming 5V or 12V potential between the drain and source). ...
0
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0answers
38 views

Help with parts identification from arduino starter kit from aliexpress [migrated]

Ordered an arduino starter kit from aliexpress Link The parts list they provide (as a jpg on the order page) is vague and not very descriptive, I've gone through most of the parts and am down to ...
6
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3answers
203 views

How to find out if a microprocessor is powerful enough

Everybody knows its easy to develop a proof of concept for an embedded device on a rasbperry pi or even a PC, although when it comes down to choosing a microprocessor for your product, it is difficult ...
0
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1answer
40 views

Permanent ON/OFF tactile switch [duplicate]

I am looking for a small tactile switch that works like: press once -> turn on, press again -> turn off I only found this model http://www.adafruit.com/products/1683 , but i am looking to buy ...
13
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4answers
2k views

Is it worth reusing old components

I find myself constantly trying to recycle old components in my new projects. Yesterday, I needed a demultiplexer so I just took it out from some old phone board... Demultiplexers cost basically ...
5
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3answers
393 views

Use Cases for an External ADC

Most Microcontrollers (uC) have an Analog to Digital Converter (ADC) as part of their peripheral set, which is phenomenal as this integrates two components into a single package. These ADCs are ...
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1answer
37 views

Sourcing An Image Sensor? [closed]

I'm wanting to create a basic digital camera, I have most of it figured out... except for the image sensor itself. Looking in the normal places (digikey, mouser), I'm finding some very basic, low ...
0
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1answer
52 views

How to test Solid State Relay Testing

I am a newbie to electronics and hope someone can help. I am looking to test a SSR for my own experimentation to see if I understand this correctly. I have a SSR for 120 AC. (I am not plugging in ...
0
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2answers
70 views

MCP602 alternative?

What can I substitute in place of the MCP602 in the following circuit? It is a pulse rate detector.MCP601/2/3/4 are not available where I live. I have attached the relevant instructable and the MCP602 ...
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1answer
112 views

Unknown part from an old television [closed]

I found this in an old television. I'm very curious as to what it is. Please enlighten me! I'm thinking, some kind of over-voltage protection?
1
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2answers
301 views

Need help for identifying components

I have bought a shocking gum which gives a small electric shock when you pull a side, like this one : http://img.weiku.com/waterpicture/2011/10/31/20/Shock_Chewing_Gum_634577515693532881_3.jpg I ...
2
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1answer
145 views

Identifying a component symbol in a schematic [duplicate]

Problem: So I have ran across the following part and I simply don't know what it is. I tried searching for if you will a description of it. (I.E. two diodes on top of each other pointing opposite ...
0
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1answer
41 views

TPS54383 switching regulator components.

I'm trying to build a switching regulator using the TPS54383 dual output regulator, Now I've got most of the components and schematic figured out here. pdf Except the inductor's and diode; I'm ...
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0answers
30 views

Trouble in proteus isis

I need to design a few components in Proteus. Due to complexity of the design ( and size of circuit), I decided to use the sub circuit feature. I made a block diagram of my design and edited its ...
0
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0answers
42 views

Good narrow beam, modulated IR sensor suggestions

I am looking for a narrow beam, modulated, digital IR sensor that can detect a distance of at least 10 cm (longer is better). I've talked to mouser and pololu and they were unable to leave me in the ...
1
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1answer
48 views

Are there any single logic gates which are just individual components?

As the question says, I need a NOT gate for a simple Bi-Colour LED circuit. I do not want to use an IC with 6 or 7 integrated as I am only going to use 1, so it's just a waste. So, do individual ...
7
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3answers
384 views

Why are discrete four-terminal MOSFETs so hard to find?

I know that a MOSFET is a four-terminal device, but nearly every discrete MOSFET you can buy has its bulk/body/substrate internally connected to the source. Why is this? It makes it inconvenient to ...
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1answer
60 views

Burned component help! [closed]

My central heating mixing valve is down... There is a clearly burned component, right next to the blue thing (capacitor). Can someone tell me what that is? Thank you
1
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1answer
66 views

Can't identify component

I was disassembling an old CRT monitor and I came across this component, but I've been unable to identify it. Can somebody help me with it? Thanks.
0
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0answers
71 views

How to read part number on a transformer? Inside Dell power adapter LA65NS0-00

I have a dell power supply that doesn't work anymore and am trying to salvage the parts: http://www.amazon.com/LA65NS0-00-Dell-Inspiron-notebook-Adapter/dp/B00115AOTA There's a transformer in here, ...
1
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0answers
85 views

What is this motherboard component that looks like a bead of solder [photo], and can it be repaired/replaced? [closed]

As you can see, the one on the top is burnt. Whenever I plug the power adapter into the wall, the component releases a puff of smoke and the adapter instantly shuts itself off. The damage to the ...
7
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1answer
797 views

What is the component on the schematic indicated by the symbol of a diagonal rectangle with a line through it?

I can't for the life of me, figure out what these diagonal rectangles are... Help?
2
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4answers
191 views

Which diode to use on my RC switch debounce circuit?

I am choosing parts to build an analog RC switch debounce circuit. I plan to implement the circuit described here: http://www.ganssle.com/debouncing-pt2.htm (see "An RC Debouncer"). These are the ...
1
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1answer
68 views

Identifying a four-pin IC labelled EL 8+7 G8025

I want to know the purpose of a component named "EL 8+7 G8025" which was found inside a Nokia charger.
0
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1answer
117 views

Additional current source for large LED-7-segment-display

I have two sets of LED-7-segs. Each with 4 Digits, all 4 inch tall. One set CC, the other CA. Combined they consume some smooth 1.68A / 1.4A according to the data sheets. That is manifold the ...
1
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1answer
70 views

Modify MEMORY component to more sensibly Load/Store value?

I have created the following electrical circuit using Logisim: My ALU takes in 2 8-bit values and performs the operation set forth by the [Op Setter]. In particular, when the [Op] code is [100], ...
2
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3answers
168 views

What is this component that is found in lots of phones?

I was taking apart an old phone (an old LG GM360). It was always a terrible phone. Anyway, I found one of these inside when I was tearing it down: I have also found some of these in the back of my ...
0
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1answer
104 views

Participation of DC component in total average power of signal

My task is to calculate participation (in percent) of DC component in total average power of signal from photo: I represented this signal as complex Fourier series: ...
0
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1answer
84 views

What determines the maximum rotational speed of a hard disk drive?

Through my background research I understand that the limit on the rotation of a hdd is largely the product of heat and the specs of the physical disk, but I am puzzled by the round numbers advertised ...
2
votes
3answers
291 views

Electronic component for tapping

I'm in need of electronic component that is able to be tapping, giving a type of massage on the skin. I did some search and can't find anything that is as big as the tip of the finger with the nail. ...
0
votes
1answer
96 views

What is this SB component on schematics

Is the SB19 component a "jumper" (0-Ohm resistor)? On the board itself, some of these are placed, and some aren't, leading me to believe that's what they are. There aren't any 0's on them, though. ...
0
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2answers
66 views

Building a first State Machine circuit - Technical Help

I just learned how to synthesize a diagram of a finite state machine into a diagram of a logical circuit composed of D flip flops, a clock and logical gates. However, I don't really have much ...
3
votes
1answer
110 views

What is this component in series with my water heater's thermocouple?

The other day we had our water heater go out and the issue was diagnosed to a faulty thermocouple. When the repair man removed the faulty thermocouple he noticed the following disk-like component in ...
2
votes
1answer
106 views

CadSoft Eagle polygon won't reach pads in Molex library

I'm using the Molex 5569 library in CadSoft Eagle. When I create a polygon, it won't reach the pads at all. The problem occurs only with components from this library. Have a look at this screenshot ...
0
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3answers
67 views

Where to find a discrete transmission gate

I have a project where I need to switch analog signals. Ideally, I would like to just use a few transmission gates to do this, but I cannot find anyone who sells or produces them! I've checked ...
11
votes
5answers
418 views

Why are MAX-, AD-, LT- parts (among others) so expensive?

I'm curious why some IC manufacturers like Maxim, Analog Devices, and Linear Tech's parts are so expensive? I know they are much higher quality (better electrical characteristics, etc), but for some ...