Questions tagged [components]

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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Trying to build RF comb generator based on a schematic. Please help me pick types of components and figure where to purchase them [closed]

I am trying to build this RF comb generator. I've located links for the following: Q1 (BFS17): https://www.aliexpress.com/item/4001097379501.html?spm=a2g0o.productlist.0.0.405918830Mab95&...
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What kind of component is this resistor-like part?

If I didn't know any better I would have assumed this was a resistor, but it was on a PCB with the label of "C4" which leads me to believe it is a capacitor. This came from a Zelda SNES cart....
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What does this component on a +12V wire do?

I have a 12V LED lamp in a caravan that does not work. On the +12V wire I found the following component which seems to be the problem, as bypassing it makes the lamp work again. My question is: What ...
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Dual LED Configuration [closed]

I'm looking for a dual color red/green LED that is not common-anode, not common-cathode, but common anode-cathode (anode of one LED shares a pin with the cathode of the other LED). Can anyone list a ...
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What capacitor is this (part number)? Looking for the datasheet [closed]

I'm trying to find the datasheet for this 1.0F & 5.5V capacitor. Some identifying labels on it are "GC", "Japan", and "822". I haven't had luck in my googling, so ...
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SD Card Reader power supply

I'm checking a schematic with SD Reader, and I have realized that SD Card Reader needs a special 3.3 V through an special circuit, but I can't understand what is this circuit.
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Is there any difference between Silicone and RTV

I've used silicone RTV that's intended for use on PCBs and have also used 100% silicone purchased from the hardware store to use on PCBs. I was not able to tell a difference between the two. ...
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Oscillator without active components

Is it possible to construct an oscillator using only passive components, including R, L, C, and transformers? No semiconductors or vacuum tubes, etc. Batteries are allowed.
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How do I place a component in the center of the board? Altium

I'm attempting to align some components, such as an OLED display and a push-button, to the pcb board's centerline. The board was imported as STEP from Solidworks and has a non-uniform format (not a ...
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Help me find the datasheet of a component (547 T518A)

This is a picture of a component its designator is 'Q1', so it would be a transistor, but I couldn't find it on the internet:
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How big of a capacitor do I need to support my car?

I drive a 1974 Volkswagen Beetle, I have recently installed a fully electric AC compressor, and I am running a Bosch 75 amp alternator but I find that my car struggles for power when the AC is turned ...
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What exactly is this piece of electronics?

I've come across a component which I have not been able to find on Google. My guess is that it could be a sort of radio controller, since I recognise an antenna and a 27M oscillator. I have included ...
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Part identification: SOT753/TSOP5 marked E:I

I need your help to identify the part on the attached picture. I've already identified it as an SOT753 / TSOP 5 part but couldn't find the manufacturer or a source for it. It comes from a board which ...
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What is this electric heater thermostat component for?

I am trying to fix an old electric heater that does not turn on. After opening the casing, I identified the part in the picture to be probably a bimetallic thermostat. When I push the part with red ...
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12 votes
2 answers
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Which manufacturer's logo is this?

I'm trying to identify the manufacturer (and hopefully part number) for these capacitors. My guess is they're standard aluminium electrolytics, rather than something fancy like alupoly, but I can't ...
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What is this strange black rubbery component? A capacitor?

I'm trying to figure out how a PCB works (that I took out of something). I'm going through and looking at the different components, and I've identified a handful of parts, but I'm totally stuck on ...
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What is this component marked 22A MHP6F3.00?

I'm trying to find datasheet for this MHP6F3.00 chip. I found this inside a cheap Android PSP clone motherboard. Here is the photo:
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What are these components used to configure radio channels?

I got my hands on pair of MOCOMA III radios: While inspecting them, I noticed that channels are configured by inserting some components into designated slots: Internals of the radio: Component ...
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7 answers
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Component Tolerance Probability

This is more of a manufacturing question than anything else. What is the probability distribution of component tolerances? For example, let's say I ordered a 100 ohm, 5% resistor, and I order 100 ...
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How do you make a single falling edge pulse when a falling edge is detected?

im designing a circuit where when the switch is open, the 555 timer ic's output goes high but in real life, for the 555 timer to go back to a LOW state, the trigger pin needs to be higher than 1/3 Vcc ...
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A male-to-male cable for the MJ-4PP-9

I'm building an Ergodash which requires a MJ-4PP-9 socket and a matching TRRS cable. I believe I've got the right female with the following dimensions. However, all the male-to-male cables I've got ...
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3 answers
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Why is the Base-emitter ON voltage as high as 2V in the BJT datasheet?

Below is a snippet from a BJT datasheet. Why is the Base-emitter ON volatge mentioned as 2V? The Base emitter voltage should be 0.7V when the BJT conducts.
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Have cross reference books ceased to exist?

Back in the "good old times" when I had a device fail I could grab my trusty old transistor cross reference book and find a replacement part with the same footprint and comparable parameters ...
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How do you make a custom PCB footprint?

I’m new to PCB making so bear with me. I’m making a board for a machine I’m working on. It uses a A4988 stepper motor driver and I can’t find any component I could import to use. I figured I could ...
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What are this chips marked "0B2004ZCP" & "0B2603CP"?

I'm trying to find datasheet for two chips. I found this inside a TCL 18W Quick Charge adapter. I think this are ON Semi parts. But I'm not sure. I think 0B2004ZCP is some kind of diode and 0B2603CP ...
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Need help identifying SMD diodes

Could someone help me to find product names of these diodes. The search did not give clear results. One of them is marked as s1y And second is seems 05 with rotated J and it has dot under 05. Thanks ...
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NIPDAU vs SN finishing and certification

I am about to certify my design for RF and BT and I already have the mass production component reels. However the certification will be done with a prototype using spot purchased components. For one ...
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3 votes
2 answers
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Help Identifying SMD components + How is one meant to know what these are?

This board is a transmission control module from a mercedes van which I have been told by a garage needs to be replaced because of a "short". For the cost of the part, it's worth taking a ...
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Inductor vs. ferrite bead

What is the distinction between a ferrite bead (as an SMT component) and an inductor?
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What kind of component needed for this purpose?

I need to precisely manually adjust R4 and R5 to the same value below using only one potentiometer or something similar(these resistors set the gain): I mean if I manually adjust the knob both ...
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7 votes
2 answers
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What is ohm joules unit used for? [duplicate]

I found following component but don't know what it is. In particular what does the ΩJ unit mean?
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Why are some SMD components cylindrical?

Outside of fuses or similar socketed parts, why are there cylindrical SMD components - such as this Zener (package DO-213AA): I feel like this would be a pain in assembly in general, and a nightmare ...
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1 vote
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Identifying SMD motherboard component

My motherboard (Gigabyte b450) died after a power outage. I found out that an SMD 5-pin IC with the code VA8qE was burned. I tried to identify it myself, with no luck. I searched for the code online, ...
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Version control for component libs in Altium

I am using Altium for years, but never succeeded in efficient usage of SVN or GIT for managing the Altium component libraries. Now we are 2 engineers working on the same HW design. We are struggling ...
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2 votes
2 answers
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Understanding of an adjustable capacitor

I am just wondering about this component. It seems to be an adjustable capacitor. This PCB belongs to a Rogowski coil measurement device. I know this application has an integrator so I think this ...
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How do you build an RF device-under-test rig to create your own touchstone (s2p) files with a VNA, de-embedded to pins?

Can you calibrate a VNA to the pins of just any (low-power or passive) component and then generate an S2P to optimize an impedance match with RF simulation software to do whatever you want? If so, ...
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Value for SMD crystal marking: 33b00JZ, needed

Does anyone know the value (frequency) of an SMD crystal with marking 33b00JZ? Datasheet link will be highly appreciated.
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I am trying to identify a component next to a high-voltage output

I am having a hard time finding a component and its value. Can anyone tell from the image? The component, that is some type of coil/transformer/choke, sits right next to a 2500 V high-voltage output. ...
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0 votes
1 answer
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How can I identify this chip, Motorola 00S72-C?

Well, I guess it's identified as an 00S72-C, but I need the data sheet, or what this does. I am working on a Ford EEC-IV system. I have 2 circuit boards, identical, but there is one chip that is ...
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Snubber Filter Circuit Not Working Triac Dimmer

Hi I am working on a project using a triac to do phase control dimming of 120V ac powered devices. I recently translated my project from perfboard to SMT using an SMT fabrication service. The project ...
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0 votes
1 answer
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Where to buy fancy/cool looking toggle switches [closed]

I wanted to know if anyone knows where to buy old, vintage style toggle switches like in the example photos. I have searched for toggle switches, and I have never found anything that looks remotely ...
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0 votes
1 answer
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Low-profile, panel-mount connectors

I'm working on a hobby project, a handwired ultra-low-profile computer keyboard with a 3D-printed case. The USB-C connector on my dev board is only 3mm tall, so it fits within the 4.5~5.0mm of ...
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2 answers
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Can anyone identify this SMD?

I can't get any readings with my multimeter (it's probably blown up), and the board doesn't have any schematics. I've been searching the net for hours and can't find anything about it. It's the white ...
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Help identify this component: is this a varistor?

Is this a varistor? Can anyone identify this component? [![enter image description here][1]][1] Description: rubber coated, almost U.S. quarter sized (23.2 mm diameter, 2.2mm thick), dark gray, and ...
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2 votes
0 answers
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Why have space-grade components such long leads? [duplicate]

What are the reasons why (some) space-grade components are shaped like they are, with their characteristic long flat leads, golden finish, etc.? Image: DP83561-SP from TI Are the assembly houses ...
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Do 1MHz 3.3V through-hole oscillators exist?

I'm beginning my first MCU project and I'm having trouble finding a suitable oscillator. I want to run an ATtiny261 at very low power. It will be lighting up different combinations of LEDs based on ...
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1 answer
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Best way to "cut" a connection on a pcb [closed]

Imagine you have some traces on a PCB, that connect from point A to point B. I would like to have control over that connection. I want to be able to enable/disable the connection from a distance (...
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2 votes
3 answers
407 views

Help identify IC

This is an LED light from AI, PRIME 16HD model. I have identified the IC that seems to be burned; it looks like it's some kind of voltage regulator. I think the markings are: BN0D 18. Maybe someone ...
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1 vote
1 answer
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Altium: One resistor, mutliple values in library

This question has been asked 8 years ago, but I'm hoping for a new answer. In the past if I have wanted to create a 0402 resistor and have several different values, I have created several different ...
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2 votes
1 answer
100 views

Detecting cut wire (tampering) for low power project

I'm trying to develop a cut wire detector that will be used in order to detect if a specific wire is broken or not (a.k.a fake bomb). I'm using an ATMEGA328P running on batteries (3V) at the internal ...
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