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Questions tagged [terminal]

A "terminal" or "terminus" means the "end"s of a circuit component (wires, resistors, capacitors, ICs, etc.). According to their shapes, termini are known as lead, leg, screw, pin, plug, probe, contacts, etc. On a terminus we apply electrical connectors.

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Should solenoid be connected to NO or NC terminal of RF remote to retract plunger end off of edge of tiny spring-loaded door so it can snap closed?

Remote-control nestbox bird trap. End of solenoid plunger will rest on edge of the tiny, spring-loaded trap door to hold it open until remote control is used to trigger solenoid to retract, releasing ...
moabird's user avatar
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Identification of a directly soldered PCB terminal pin 13.55 mm × 1.58 mm

I add in this question the picture of a PCB terminal, in this picture have the mesures of it. somebody can tell to me what terminal is it? Thanks.
GustavoSBelote's user avatar
1 vote
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48 views

Junction diode "built-in" voltages

When a PN Junction terminal are left open-circuited, the voltage measured between then is zero. The Junction voltage Vo does not appears. Because similar built in voltages arise at metal semiconductor ...
Abdus Salam Akand's user avatar
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4 answers
111 views

How do positive/negative terminals work in a circular plug-in adapter?

I have an adapter with a circluar plug, then a positive and negative terminal. How does the adapter (the green piece in the picture below), which can be in any rotational orientation maintain positive ...
Rilcon42's user avatar
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5 votes
3 answers
555 views

With modern connectors, is the metal shell used as a conductor?

Does the metal shell of a connector, such as USB and HDMI, serve a conducting purpose? The metal shell of my TV's HDMI terminal is corroded. Should I make effort to have it contacting and conducting ...
Puvitar's user avatar
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4 votes
1 answer
176 views

Molex PicoBlade current rating confusing

It seems there are confliction in specifications of PicoBlade for current rating. From the MolexPicoBlade Connector System datasheet, I assume that the current values in table is per circuit value. ...
slyx's user avatar
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1 vote
3 answers
118 views

Molten plastic or resin over jumper terminals

I have a number of sensor boards on which I need to close two jumper connectors with solder. On the second board, my iron was not sufficiently hot and I made a mess of it. I've since replaced the iron....
sebinho's user avatar
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1 vote
1 answer
106 views

Screw terminal damaged in input 230 V three-phase power supply

I use screw terminals for a 230 VAC three-phase power supply, but it blasts in many PCBs, so I want to replace it. What would be a better solution?
gaurav rajput's user avatar
1 vote
1 answer
943 views

Three-phase motor 380 V wiring

I have a motor with this connection. I find it a bit strange that it has two terminals. I think it is a two-speed three-phase motor. Which diagram from the paper is being used in the connection and ...
gsoap's user avatar
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0 votes
1 answer
104 views

Fixing traverse on Guldmann GH2 (old title: Measuring EMF and terminal voltage with multiple batteries)

Suppose we have two 12V batteries as our source voltage. How can the EMF and terminal voltage be measured when using one 12V battery versus both batteries? Since terminal voltage deals with a closed ...
JustBeingHelpful's user avatar
2 votes
4 answers
374 views

Why do some transistor packages have multiple leads for the emitter?

I want to use a BJT transistor (edit: BFU768F, https://www.nxp.com/docs/en/data-sheet/BFU768F.pdf) that looks like this: I think I get why lead 1 is bigger than the rest. It's because both collector ...
Max's user avatar
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4 votes
2 answers
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What does the 'C' marking on this battery indicate?

As the title says, what does the 'C' marking mean? I first figured it may be the terminal that outputs temperature data but I'm not sure. I wanted to build a custom solar charger for this battery and ...
user3418620's user avatar
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0 votes
1 answer
1k views

Correct connection to F3 type battery terminals

Looking for deep-cycle lead acid batteries, I come across several models which feature what they call an "F3" type terminal, like this: Basically a vertical metal tab with a hole in it. I ...
Russell Teapot's user avatar
1 vote
0 answers
67 views

How to protect measurement equipment channels from ESD?

I was wondering what is the best way to protect measurement equipment, when handling like oscilloscopes/spectrum analyzers/Vnas/sensitive circuits (especially when stored in (none esd) foam)? I was ...
ulix's user avatar
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1 answer
132 views

What is the terminal on the photo?

Does any one know what is the name of terminal on the photo? Or what is the kind of the shown connectors, not necessarily the exact one? I tried sharpening the image and reading off the name but no ...
Igor Smorąg's user avatar
1 vote
1 answer
248 views

How do you check if a terminal is compatible with a connector?

In example, if I was looking for a terminal for this type of connector. I'm looking through terminals but I don't really know how to make sure they'll be a fit for each other. In a general way, how do ...
eWizard's user avatar
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4 votes
2 answers
1k views

Can I pass DC 36V 100A through a terminal block that is rated for DC 300V 30A?

In the system that I am designing, the peak current that the system requires is 80A at 36V DC. The terminal blocks that are available on the market are rated for 300V 30A. I want to know if the ...
DeHeisenberg's user avatar
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55 views

Unknown Terminals - Sourcing

Does anyone have any info on the terminals shown in the photo below? I believe they are an old Siemens design, but I don't have a proper name to try to source these. There are no markings or numbers ...
Gord's user avatar
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3 votes
1 answer
213 views

Which crimp terminal is crimped correctly?

I've loaded the crimp terminal two different ways in my crimper, but I haven't the experience to say which is correct. Cursory web research doesn't seem to answer the question. Edit: this is the first ...
Mathieu K.'s user avatar
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2 answers
137 views

What manufacturer is this contact?

I have a relay contact, that I am trying to identify. It is from an Audi, who mostly use TE/Tyco, but this is different. It has this marking on it: Which I have tried to replicate here for clarity: ...
Mark Tickner's user avatar
10 votes
2 answers
2k views

What is this wire connector/terminal called?

Could you please tell me the name of the red wire connector/terminal shown in the picture?
Alex's user avatar
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3 votes
3 answers
376 views

What kind of terminal block is this?

I've perused a few resources (linked below) trying to learn more about this strip / block, but they mostly have side views / cross sections. I just want to know what the things in this picture are ...
DJG's user avatar
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0 answers
87 views

Identifying PCB based Connectors

I am trying to identify the type/class of connectors that similar to PCB straight type connectors that you see in RAM modules, PCIe Cards. I have this custom board for which I am trying to identify ...
sandeepzgk's user avatar
9 votes
1 answer
3k views

What are the 9V battery terminal size specifications?

I'm trying to find the dimensions of a 9V (PP3?) battery (no specific chemistry). For some reason it's giving me a lot of trouble. I've been able to find most of the information (I checked a bunch of ...
Jason C's user avatar
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765 views

Open circuit fault detection using an Arduino

I was able to implement short circuit fault detection of under ground cables and I was also able to add a GSM module(SIM900D) with it. I'm trying to further enhance my project by detecting open ...
Rakibur Khan Rahman's user avatar
3 votes
0 answers
52 views

Analogue signal issue? [closed]

I have an issue with a analogue signal. Your help would be greatly appreciated. The signal is a 5Vdc, it is an output from a PCB which is a source to many A/D PCB. its output is connected using wire ...
Chipresistor122's user avatar
2 votes
1 answer
843 views

Converting an electrical schematic into a physical panel layout

I'm an undergrad researching physics, my job has been to make this electrical schematic, can I get some help figuring out the physical layout? I've basically self-taught myself enough of solidworks ...
Quarmy's user avatar
  • 21
1 vote
0 answers
512 views

MDB Protocol - Communication between a PC and a payment terminal

I'm working on a project where I need to create a communication channel between a standard PC (running Windows) and a payment terminal (a NFC credit card reader, an Ingenico iUC 180B). I'm a junior ...
Franck's user avatar
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2 votes
1 answer
143 views

How can I terminate a wire passing 32A

I have a cable with 3 X 10 AWG stranded conductors, L1, L2 and Earth. This cable will need to pass 32 amps of continuous current for 24+ hours at a time. I have this contactor: As you can see, the ...
Matthew Goulart's user avatar
1 vote
1 answer
444 views

Female terminal pin

What is this female terminal pin called, Everywhere I look I can only find slightly similar ones, but no matches, Even a reverse Google Image search pulls up some weird alternatives The only ones I ...
hello moto's user avatar
0 votes
3 answers
122 views

How do you call wire pins that can be used as jumpers with your breadboard?

I can't seem to find these things on electronics distributor websites. There are a bunch of various pins and connectors, but I can't find these among them. What are they called? I tried "Dupont 2....
bp2017's user avatar
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1 vote
1 answer
340 views

Disassembling pre-assembled JST Rectangular Plug PHR-4 (0.079")

I'm going to purchase pre-assembled 4-Position Cable Assembly CABLE-PH04 with standard PHR-4 JST connector housing [0.079" (2.00mm) pitch]. The PHR-4 JST connector plug will be connected to mating 4-...
fxgreen's user avatar
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0 votes
1 answer
84 views

Wire connectors for Back of Push to Exit Button

The connection terminals on the back of these Request to Exit buttons seem to resemble what I can guess is a "compression lugs". Not really sure what they are called and I'm not familiar with general ...
jrhicks's user avatar
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0 votes
1 answer
64 views

Looking For a Specific Connector [closed]

I'm designing a single layer Aluminum PCB and all components needs to be SMD/SMT. I'm looking for a common connector that will deliver DC power at 24V and up to 5A minimum (10A ideally). Right now, I'...
Agriculex's user avatar
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0 votes
2 answers
166 views

What are these female 2.54mm (0.1") crimp terminals?

So I but some crimping terminals to make my own custom cable connections for the first time today for an Arduino project I'm currently working on. Comparing to some older ones I have from premade ...
ChemiCalChems's user avatar
2 votes
2 answers
194 views

What is a terminal plane in high frequency circuits?

The term "terminal planes" come up very frequently in books on microwave circuits. What exactly does the term mean? The closest answer I have got is A terminal plane, or reference plane, is the ...
Paddy's user avatar
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-2 votes
2 answers
5k views

Why are there 2 connectors on li-ion batteries

I'm looking at just about any assembled li-ion battery pack for sale and they all have 2 connectors coming out (4 wires total) and I'm wondering why is that?
php_nub_qq's user avatar
2 votes
2 answers
560 views

Can I trust in visual inspection to identify LED terminals?

In the figure above, LED A is a regular 5mm LED and the visual identification of its terminals polarity is well known. As you can see, on LED B the anode is identified by the longer leg, but the ...
AmssmA's user avatar
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0 votes
0 answers
49 views

AC to terminal block relays

How can I use one power cable to connect to 4 relays in parallel? So for example, I have one power cable and I want to turn on 3 radiators out for 4. This is my screenshot of the circuit. Terminal ...
M2T156's user avatar
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2 votes
1 answer
1k views

Why MOSFETs in Battery Management System are connected to negative terminal?

I have seen that the MOSFETs and current shunt resistors are connected to the negative terminals of the battery or the BMS. Is there any specific reason for this? Why aren't they connected to the ...
launchin2space's user avatar
0 votes
1 answer
111 views

Calculating Joint (Load in lbs or Kn) requirement for a compression lug on top of a bus bar

I have found myself in an interesting scenario that is actually more mechanical in nature but maybe you guys can point me in the right direction. I am having a hard time finding any ISO, IEC, or ANSI ...
Busta's user avatar
  • 35
0 votes
1 answer
145 views

What is the reference/name of this connector?

I would like to know the name/reference of this connector: This is for 2.5mm² max wire When you push the orange button, it unleash the wire Thank you
vib's user avatar
  • 341
0 votes
1 answer
99 views

When I checking the hot terminal in the socket, multimeter shows the current through me?

I set my multimeter in AC voltage measurement, connected + wire of multimeter to the hot terminal of the electrical socket, and take - wire in my hand. Now it measures the voltage. This procedure ...
Stdugnd4ikbd's user avatar
0 votes
1 answer
255 views

Is it possible to implement a serial console via GDB?

Is it possible to send debugging messages from MCU to PC over SWD via GDB without interrupting the running code (ie. without using breakpoints), like we could do via UART of MCU by sacrificing 2 UART ...
ceremcem's user avatar
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3 votes
0 answers
272 views

How to find the right connector?

I have gotten the task of finding an appropriate connector for our application, but given so much information there is on connectors, I don't even know which information is relevant. So this is the ...
Samo Smodis's user avatar
1 vote
1 answer
269 views

Type of terminal/connector to use for CAN bus on Arduino MKR CAN Shield

Probably, this is obvious to everyone, but since I am a newbie to electrical engineering I am stuck. I have two wires of a CAN bus, (CANL and CANH), and I wish to connect them to the Arduino MKR CAN ...
anroesti's user avatar
  • 143
0 votes
0 answers
49 views

What style of semi-permanent power connector for vibrating environment?

With the only constraint being that the connection is "easily" removable (e.g. not soldered, but common tools are fine), what style of power connectors work best for vibrating environments? ...
user2152081's user avatar
2 votes
1 answer
726 views

What is the PCB name of this speaker connector?

I am designing a PCB board in EasyEDA for a DIY audio amp. I have searched in several places to find the proper technical name of this speaker connector but I could not find it. I searched in Mouser ...
Omar Zanhour's user avatar
-1 votes
1 answer
96 views

Does battery wear depend more on EMF voltage (capacity) or terminal voltage? (charging full slowly vs. charging fast)

Let's say there are two identical Lithium-Ion batteries. (is it any different for Ni-MH batteries?) One gets charged at 0.1C until the EMF voltage (which is capacity-dependent) reaches 4.3V. The ...
neverMind9's user avatar
3 votes
3 answers
170 views

What type of terminal is this

Okay, simple yet seemingly impossible question here... What type of terminal is this? It looks like exactly what we need, but I found the image on an advert for the shrink-wrap shown in the picture. ...
J. Carter's user avatar