Questions tagged [identification]
Identify chips, connectors, cables, and other components, from photographs and descriptions of the surrounding circuitry or equipment.
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How do I identify SMD components? (or how do I identify any component)
How do I identify the markings on an SMT component and match it up with a part number so I can be a good designer and actually look at a datasheet (and read the whole thing)?
Or identify a part to ...
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Name of component on output side cable of a DC power adapter?
What is the name of this component (circled in red) of a charger?
What are the uses of this component?
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Identifying a resistor with a weird band combination
I am currently in the process of trying to repair a power supply that has had one of its DC rails fail. A resistor in the PSU has exploded and I am trying to find what value it is.
Band 1: White
Band ...
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How do two-leaded color changing LEDs work?
I have a few 3mm color-changing LEDs which I harvested from a toy. They fade in between all different colors, and then after a little while, they blink crazily between all the colors. After a few ...
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Is there some logic in IC name prefixes?
There are hundreds of prefixes in IC names, this page lists a number of them. For some it's easy to see that they refer to the manufacturer's name, like AD for ...
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Taking apart old electronics
I sometimes end up having someone's unwanted old electronics, usually faulty ones. Does it make sense to harvest components from such. Anything valuable I should be looking for?
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Identifying Capacitors
I bought a mixed bag of ceramic capacitors from Maplin and I'm struggling to identify most of them. I'm a bit of an electronics newb, but I understood that a capacitor usually has 3 numbers on and ...
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Castellation metal loop connector
Here's a module with castellated pads attached to an eval board:
(source: alicdn.com)
Looking closely at the wires interfacing with the castellated pads, they're clearly soldered to the eval board. ...
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What are turret connectors?
While working on a project recently, I noticed that Digi-key has a product category "Terminals - Turret Connectors". I've never seen connectors like this before, and they don't look like any kind of ...
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What are those small metal bars going across a PCB for?
In quite a lot of PCBs that I have seen, they often have these small metal bars going across from one point to another.
Here is an image of what I am talking about. In this example it is a charger:
...
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Are these pin connectors a standard part? If so, what are they called?
This is a "wet" temperature sensor for a Boilermate 2000 thermal store. The pin connectors are inserted into a plastic plug that connects to the control board (see 2nd image).
The pins do not stick ...
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How do I identify this component? It just says 0 on it [duplicate]
Can anyone help me identify this component? It just says 0 or D on it (I think it's a zero). I tested it for conductivity with a multimeter - doesn't seem to have any (tried both polarities in case it'...
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Do Atmega328 chips have pseudo-unique IDs?
I'd like a couple of Atmega328s to run the same program, but they're going to interface with each other and need unique IDs. Is there any such ID or serial number hard-coded on the chip?
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What connector is similar to U.FL but has no pin?
I am trying to identify this connector style:
Look at the two RF micro-coax connectors on the left, just next to the PCB antennas. They look identical to U.FL or IPEX but have no central pin. What ...
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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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What is the name of this connector from a fan?
I am EE hobbyist and I often used recycled parts in my projects. I came across this connector to a Heat Sink Fan and would like to know the name of it.
Thanks for the help.
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What is this glass bulb with two parallel electrodes on my PCB?
Might be super obvious, but I've not encountered one of whatever this little dude is before:
I figured some sort of vacuum tube, but no idea beyond that. The two poles aren't linked. Found inside a ...
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How to find socket for ThinkPad keyboard ribbon cable connector?
I am looking for a socket which is able to receive the connector of the ThinkPad X41's keyboard ribbon cable. How do I identify the socket so that I can find it on the (German) market?
Background: I ...
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Help Identifying Weird Component
Attached you find photos of a Li-Ion battery's PCB. I'd like to know what this component is called and what its use is.
The component in question is the three pin stretched silver "bridge". The white ...
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Metal bar on DMM PCB
What is this large metal bar inside my DMMs? One of them labeled it ST. They appear to be connected to the COM port or fuse. Is ...
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What are these coils on transmission lines?
What are these coils?
This was asked by doetoe in this physics.stackexchange Question
Where I saw them (maybe six or eight pairs) they came in pairs, always on the same two lines, and they were at ...
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Testing points in PCB
I am designing a prototyping platform called evive. It is a learning cum prototyping platform for students and makers. Since many times we requires debugging of our circuits, so I thought to include ...
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What is this component and what is its use?
I found this in CRT TV on the CRT tube driver PCB.
What are they and what is their schematic symbol?
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Indentifying a JL chip in a Bluetooth
I'm new to electronics and my Bluetooth speaker broke and want to fix it. This is the chip I think I need to replace.
Can anyone help me find this chip's datasheet? I just need to know what each pin ...
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What do you call the connector type which is soldered on PCB and it holds cables by pressing on them by screws?
Here is a picture of two of them:
I searched for these connectors in Digikey and Farnell for an hour, but couldn't find anything similar. Can you please name these connectors for me and/or give a ...
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TVS diode replacement - top marking P450 DEM
I got a Hikvision camera DS-2CD2332-I that was mistakenly connected to 48 V power supply instead of 12 V. I checked the board and found a TVS diode is getting hot. The power supply LED was blinking at ...
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HBQ-i7 Bluetooth Chip Identification
I was recently in Hong Kong and decided to purchase a knockoff Airpod to tear it down and see how it was engineered to help me in my own design process. I got to the mainboard and found the single ...
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JL (or maybe something else) misterious branded IC's, what is the origin? [closed]
Edit 12/31/2019: Thanks to Mariano Dupont:
Found it: Zhuhai Jieli Technology zh-jieli.com
Take a look at this example of an IC found on a circuit board:
Brand is found on many PCB's of Chinese/...
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Metal sleeve around cassette player motors?
I have recently taken apart a few cassette players to get motors, and I have noticed there is always a metal sleeve around the main drive motor.
Here is an Ebay product photo showing this on a ...
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What is this connector called?
I need to repair some kit that uses several connectors like the one pictured below. The existing connections have become brittle and are breaking off.
The wires appear to be crimped into the ...
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Differences between 220pf 1000V capacitors
I need to replace a popped capacitor. Externally, it looks almost like
(source)
except for the first letter: in my case it is R and not ...
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Identify/substitute an SMD MOSFET labeled "540N 88KFG" for LCD monitor repair
I'm trying to repair the logic board of an LCD monitor that died while giving off a burned smell.
It seems that an LCD driver chip and a MOSFET (I think) burned out. The chip was easy to identify (...
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Identify this rechargeable battery pack
I want to identify a rechargeable battery pack from inside an old portable hard-drive.
It is unlabelled. (I ripped open the blue covering - it isn't labelled on the internal metal cover either.)
...
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What are those wire terminals that mate with standard header pins?
I have purchased "dupont" connectors on Ebay that crimp onto a wire. They look like this:
http://www.hansenhobbies.com/products/connectors/pt1inconnectors/pt1in_ft/
I'm tired of waiting weeks for ...
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What's the usage of these holes?
I'm really curious to know what are these holes on this mobile PCB:
Are these vias? I doubt they are vias. If these are not vias then what are they? What's the usage of these holes?
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Help me identify this resistor
I am trying to troubleshoot a faulty camcorder PCB and stumbled upon this resistor(?) that is right near the DC jack.
The resistance between it is 0 Ohms.
What is this component? I couldn't find ...
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Is there any pattern or standard to through-hole resistor sizes?
I've long been under the impression that a quarter-watt resistor has a standard package, and a half-watt resistor has a standard package, etc. But I've recently gotten through-hole resistors which are ...
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What does this circuit symbol mean? (Circle with horizontal line through it)
I came across the following symbol in a datasheet (functional block diagram on page 8). What does it mean?
For future searchers, the symbol is a circle with a horizontal line (diameter) through it.
...
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Can anyone identify the microcontroller on an HC-SR04
The HC-SR04 is a popular, and very inexpensive, ultrasonic ranging device and I'd like to modify one to change its functionality. If I can identify the controller I might be able to reprogram it, or ...
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What is this schematic symbol with intersecting triangles? [duplicate]
What is this symbol? I think it is some kind of amplifier or buffer, but I was unable find any information using search terms like "overlapping triangles," "intersecting triangles," or "double ...
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Help identifying pwm controller "67A"
I am repairing a battery charger that uses two power supplies. TH20594 (couldn't find any info on that either) controls the primary PSU, while the mysterious chip controls the bootstrap/standby supply ...
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Is this "lightning storm over a tropical island" a valid electrical symbol?
This symbol is stenciled on the circuit board for Compaq PS2021 ATX power supplies. I spent almost half an hour on Google trying to identify it, and I haven't even gotten close. I thought it might be ...
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What is this component on a GoPro's mainboard?
I'm trying to identify a component on a GoPro Hero10's PCB.
It measures 1x1mm and appears to be a UDFN-4 package (or similar). It is grouped with one capacitor and doesn't have an obvious connection ...
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Which kind of component uses an "EM" symbol prefix, has a value, and three pins?
While perusing the schematic for the Sega Genesis model 2, I spotted these "EM1", "EM2", etc. components near the joystick inputs and video/audio outputs.
Looking at a photograph ...
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What's the name of this PCIE power connector?
I have a standard computer power supply unit pci-e power 8 pin connector like this one:
(source: playtool.com)
I want to power my own PCB via a connector like this and I am having trouble find the ...
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DRO scales 4-pin connector identification
I've purchased some scales for use with a mini milling machine and the open source DRO-550 digital readout platform. They are essentially equivalent to permamenet mount digital vernier calipers so ...
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Can anyone locate specs on this wifi module?
This little module was liberated from a Canon wifi enabled printer that decided not to work anymore. It appears to bear the label "Product Number: K30306" at the upper left, which naturally was the ...
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What are markings on top of electrolytic capacitors?
I often see a marking like the following pattern on the top of radial PTH elcos.
What does it mean? Is it an identification of the manufacturer?
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What is the correct term and schematic symbol for a bar "connecting" multiple toggles together?
This has driven me mad, I've searched for this on google and am now going to the world to find out what the part is called. I've tried things like "Gang bar", "shared cover", did a google image search ...
