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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3answers
144 views
What components can an FPGA replace/emulate?
I've been under the impression that FPGAs were merely, well, field-programmable gate arrays, but I've seen some example schematics with resistors, capacitors, and such in them. As such, can an FPGA ...
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0answers
116 views
What is this component on my dog's door opening collar?
I am having some frustration with my dog's pet door opener. This is an off-the-shelf system from a company called HighTechPet, and the collar unit uses a coin-cell battery with a special carrier glued ...
0
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0answers
29 views
EAGLE CAD Automatic BOM to distributor mapping for passives (with part value rounding)
I have a design with quite a large number of passive parts (resistors and capacitors). For the most part, they are all of a single package - 0402, which some larger capacitors being 1206. If I have a ...
2
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4answers
97 views
Widely available IC for encording and Decoding DTMF data
I am planning to do some research in data transmission over the air. For this I am interested in DTMF encoding and decoding.
Is there a widely available IC to achieve this? A circuit diagram using ...
0
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1answer
30 views
Identifying Computer parts(3) [closed]
I have recently received 25+ old computers and these parts were in them, and I am having trouble Identifying them using the information on them. I prefer to have links to match my information. So my ...
3
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3answers
104 views
What is the difference between the electrical components on a micro-chip and ones on an eyes-observable circuit?
For example, an IC or "microchip" where everything must be micro-engineered on to it uses the same electrical components such as resistors, transistors, etc.
But I looked around online and noticed ...
3
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2answers
92 views
What tolerance do typical components have to wrong-polarity voltages/currents?
I've always been a bit hesitant to do continuity tests on populated PCBs, on the basis that if there is no trace connecting the two probes, I will be applying some finite voltage to arbitrary IC pins ...
6
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6answers
425 views
Basic Electronics - I want to learn the “why”, not just the “how” [closed]
I have been looking for a very basic book on electronics, but many of them explain what the components do (and how they are made) and then go into designing circuits that do stuff. They tell you to ...
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0answers
63 views
Most compatible Bluetooth modem to use with Arduino Uno R3?
I'm looking for a Bluetooth modem that can be connected with the Arduino Uno R3, and communicate with Android mobile device. I found one modem (the BlueSMiRF RP-SMA) but it was to expensive, and it ...
2
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1answer
91 views
Octopus Component Tester Analysis
I'm a beginner in electronics and my knowledge is pretty basic. I've been trying to understand how the Octopus Component Tester Works. I know that it's outputs should be used to plot a Current x ...
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1answer
60 views
Eagle: How do I make a component from a board?
I recently discovered the fantastic Arduino shield components in LadyAda's latest Eagle library. Now of course I'd like to make my own, using the mechanical layer from an existing Eagle board file. ...
0
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1answer
109 views
Extract Components From a 3-in-1 Printer
I have a fairly recent 3-in-1 Cannon ink jet printer, which works fine accept creating a small skew on the printing page. I wanted to just throw it away, but was wondering if I can pull out components ...
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2answers
98 views
Using standalone smartphone camera
Is there any possibility to use smartphone camera modules without their smartphone?
those modules are relativity cheap and provide good results,
can someone explain how to do it?
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1answer
52 views
EOLs — need help [closed]
Does anyone here know, perhaps a website, magazine, quarterly, or anything at all that may tell you when specific products may have been discontinued? I receive some things from MFGs such as Renesas ...
4
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2answers
133 views
Help identify this component (part of switch de-bouncing?)
I found this component in parallel to a switch and 100nJ capacitor. My guess it that it is part of the de-bouncing circuit. Can somebody tell me what it is?
The blue disc has a diameter of about ...
8
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2answers
513 views
Does anybody know what this electronic component is?
I have an electronic component which has no letter or number on it. It has 2 legs and when you shake it there is something moving inside up and down. I am searching for it for hour still have no clue. ...
3
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3answers
204 views
Dots in a transformer symbol
I came across this schematic:
What do the dots in the transformer indicate?
6
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3answers
436 views
Can I burn components / short circuit by using a multimeter
It's probably not new to you, but sometimes we want to analyze a powered circuit with a multimeter. I love to do that, but I'm a little worried that I might burn some components or the whole circuit.
...
4
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6answers
211 views
Identifying piece of circuitry on a PCB
I haven't done electronics for a long time but am doing some for a hobby project this weekend. I'm looking for some help breaking down/analyzing a circuit board I want to modify/hack:
It's for 3 ...
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3answers
124 views
A device that wirelessly, securely posts to a server in response to door opening: off the shelf or custom-make?
I am looking for an off the shelf component for a project I am currently working on. Due to the nature of the project I cannot go into much detail about the project itself, only give a high level ...
-1
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1answer
66 views
Camera component for taking still images? [closed]
I am working with some friends on a project that needs to have an camera that takes photos, but we are needing to source just the sensor, with built in lens. One such solution I found was:
...
0
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1answer
189 views
What is this strange component from 1950 radio reciever
A while ago I took apart my grandpa's really old radio receiver with vacuum tubes. I recognize everything except for this one strange component. It seems to have some sort of heat sink on the outside ...
2
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1answer
86 views
What does 3AG mean in “Fuse Block 3AG”?
I have read from a vendor website. It mentions 3AG fuse block. What does 3AG mean?
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0answers
98 views
How to sum or calculate voltage or current harmonics component that are in parallel ?
Recently I measured voltage and current harmonics in coal mining industry. But they only have Power Quality Meter with limited current clamps (not big enough for the PCC(point of common coupling)). So ...
0
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0answers
37 views
Are there off-the-shelf sources for high-frequency high-current magnetics?
I'm often looking for high-frequency chokes. My typical spec ranges are 500-1000 volts, 10-40 kHz, 5-200 amps. Off-the-shelf chokes in that range are almost non-existent from what I've seen. The ...
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1answer
85 views
What component/device to use for a front-eye display
I need to display information in front of my eyes, just like Google Glass, but in this case, it has to fill a bigger field of view (is it the good term?). I have already thought about a couple ways to ...
2
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2answers
122 views
Please help with Identifying my diode?
I am having trouble identifying this component. I think its a diode. But I am not sure since I hardly know much about electronic components.
The Component says "22-16 U2" and then has a symbol on it.
...
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2answers
110 views
Capacitors in RFID reader
I'm trying to understand a schematic of an RFID reader.
Circuit:
What capacitors are used - electrolytic or ceramic capacitors?
I've seen schemes of RFID readers that use electrolytic capacitors, ...
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1answer
108 views
Please Help me identify this PT 1K ohm resistor's (Packaging)
Please refer to the attached Images.
Dimensions:
Hieght and Breadth: 42mm
Thickness: 25mm
I know its PT 1k Ohm resistor(Positive Temperature Coefficient) and its two connecting wires are ...
3
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1answer
104 views
Looking for identification of an electrical component
Kind of an odd source I'm referencing, but I'm looking for the identification of an electrical part in a video game item. Here are two pictures (screenshots of the 3d model), where I've circled the ...
4
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1answer
83 views
Does the line on a zener diode correspond with the line in the symbol?
For a normal diode, the thin line on the component corresponds with the line of the symbol. Is this the same for a zener diode?
3
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2answers
166 views
How to mathematically determine the frequency of a tone based on components being used
My REAL question is how to choose the right components if you want a specific frequency spit out from a 555. In my particular case I want a potentiometer to control an output frequency from 16Hz to ...
2
votes
1answer
180 views
Eagle PCB design Libraries?
I am doing my first Eagle PCB design. It's been going smoothly so far, however, I just hit a road bump. I am using a TC1269 Regulator, but cannot find the CAD library for it. I have looked into ...
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2answers
126 views
What are all the components used in this sketch?
I am trying my hand at electronics. Here's the sketch of a device I'd like to build that I found online. It's for a coil gun. I just don't know enough to understand the full sketch.
I've been ...
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3answers
132 views
RF transceiver WITHOUT built-in modulation [closed]
I'm trying to find an RF front-end module for a simple data transmission system of 500 bps.
Since I'm testing different encryptions, I want to modulate the signal, encrypt it, and then transmit it. ...
0
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0answers
167 views
where can I buy standalone smartphone camera modules?
Question 1: I'm planning on hacking together a little proof-of-concept device using a pared-down Google Nexus 7 tablet as the base. I'd like to connect a higher resolution camera where the current ...
0
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1answer
84 views
Power Jack connection switch pin?
I was looking at a this CUI power jack connector and I noticed that it has a switch which is NC, and I think goes open when a connector is plugged in (pin 2/3).
There's no clear distinction I can ...
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1answer
155 views
Please help to identify SOT23-5 packaged “T1-R17”
Picture of good component:
Picture of bad component:
These are photos of identical twins. The first is in perfect health, the other burned up and rendered the Sony VAIO PCG-8111L laptop in came ...
4
votes
3answers
188 views
What is this component, and how can I use it?
Please see the attached photograph of the component:
My guess is that it is a solenoid, but I am not sure. If it is a solenoid, I would really like to use it. The problem, however, is that I do not ...
4
votes
3answers
369 views
What does this schematic symbol mean?
I'm trying to understand what the following symbol is for. It's found in this schematic.
0
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1answer
227 views
How to understand this label on part?
From the label on thermostat I can read the following, but can't decode it to understand the max current.
CAMPINI Ty 95
C1-16(3)/250~
C2-6(1)/250~
Does ...
0
votes
1answer
188 views
Identifying rotary encoder
I need help with identifying connection scheme of this rotary encoder. I have no datasheet and there is nothing specified on the body except "CTR".
1
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4answers
246 views
Microcontroller with rotary encoder and bluetooth capabilities [closed]
I am looking for advice on (what to use/how to make) a rotary encoder that I can connect to through bluetooth. I am writing an app that needs to display on screen in real time to the user the number ...
0
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1answer
102 views
Can I change the input voltage for this temperature-controlled fan circuit:? [duplicate]
Possible Duplicate:
Can this temperature-controlled fan circuit be modified for different input voltage?
For the above temperature-controlled fan control circuit which is originally ...
3
votes
1answer
83 views
Question regarding fuses
What is the difference between thermal fuse and MOV and polyfuse.Which is faster and also which companies produce polyfuse, especially in Asia.
I have to search for a component that can save my ...
2
votes
2answers
148 views
“Giant Pixel”, low-energy component?
I'm really not sure if this is the best place to ask this, but I'm working on a project that requires a sort of 'giant pixel' of sorts, maybe about 4"x4", that can either be dark or light, and can ...
0
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1answer
155 views
Component Identification
Can anyone identify the black IC component for me please?
I have tried to find it I have no idea what it is, it is on the PCB for a piezo.
Full Image
2
votes
2answers
239 views
Can this temperature-controlled fan circuit be modified for different input voltage?
I want to know if this same circuit can be used for 220 or 230 volt input, and if there are any components that need to be modified. C3 has 600V capacity and C1 and C2 have 250 volt.
Link to ...
4
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2answers
151 views
Ethernet Without a Switch?
How do you wire up Ethernet electrically without a switch? An approximately equivalent phrasing of this question would be what is going on electrically inside an Ethernet Hub?
To clarify, I'm not ...
5
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1answer
175 views
How to find a replacement for an antiquated transistor 2N2148
I need to replace a transistor in my guitar amplifier. The model number listed on the original schematic is 2N2148. It is in a TO3 package and the rest of the specs are listed here.
I am having ...
