Questions tagged [terminal]

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

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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-...
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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 ...
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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'...
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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 ...
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Scrambled Data on a RS232 port

I currently face a problem of scrambled data on one of our RS232 connections to a serial terminal and would like to request some help, if possible. Sent: Received: First of all some information ...
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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 ...
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146 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?
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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 ...
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41 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 ...
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93 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 ...
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28 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 ...
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90 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
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84 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 ...
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63 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 ...
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96 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 ...
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59 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 ...
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27 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? ...
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108 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 ...
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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 ...
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133 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. ...
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102 views

Need to identify this pin / terminal

I need to identify this pin so I can order more. RESEARCH: I've pored over Molex.com, Allied Electronics, and here with no success. I also reached out to JST and Allied directly but they were unable ...
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78 views

identify this connector - faston housing

need MFG of this connector. It is not tyco event though there are tyco fastons installed (confirmed by Tyco). 2 position faston housing. tab locks are on facing outwards. no markings on connector ...
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84 views

Unconnected Inverting terminal of op-amp to hold a steady voltage?

I recently completed my final for my first year electrical Engineering Subject and I have the image of the question above. I was really confused because it says when both switches are open, which ...
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809 views

Find Voltage between two terminals

I have the circuit below and I need to find the voltage between the terminals A and B, which steps do I need to follow? And if there are several methods to do so, what are they?
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Why do some toggle switches have terminals of different color?

I sometimes see three terminal rocker/toggle switches, and one terminal is a different color than the other two. Here is an example: (Image from ebay.com) What does the colored terminal indicate?
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190 views

Find the Resistance between Two Terminals [closed]

Let's say R = 49 ohms, and we want to find Req between a and d, how do we do that? Do we have to find Req for the whole circuit?
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Electrical energy saving [closed]

"You can not pay for the light! This CUTE for years was..." I wonder, what will happen if to do what is illustrated on the picture. I think there are two cases: Hot terminal of left outlet connect ...
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149 views

Can I safely connect 20 Raspberry Pi Zeros to this 5V 10A power adapter

I want to connect 20 Raspberry Pi Zeros (5V, .200-.300A) to a 5V 10A power supply shown below. The setup Im planning will look like the photo below but with many more Raspberry Pis. I posted my setup ...
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838 views

How many wires can I safely fit into this screw terminal?

I have about 40 positive and 40 negative 18 gauge wires that I am trying to connect to one DC power source. I have a few terminal blocks to achieve this. Each terminal block has 2 rows of 12 ...
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51 views

Connecting a ring terminal to a smaller stud

This 12V DC breaker panel is meant to carry up to 100A, but provides a fairly small stud for terminal connection. The product documentation doesn't appear to indicate the stud size; it was measured ...
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81 views

Are the 2 terminals of an incandescent bulb lamp equivalent?

Compared to a resistor, which has 2 equivalent terminals, does an incandescent bulb lamp also have equivalent terminals?
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91 views

Is it possible to securely connect 20AWG wire to CR2 battery terminals?

I’m trying to securely connect a positive and negative 20 AWG thickness wire to each terminal of a CR2 battery. From what I understand, they don’t make terminal connectors for these types of ...
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206 views

Hack for connecting two terminal blocks?

If I bought some of these connectors. Is there an easy way to connect two of the green terminal blocks together? i.e. I would end up with a male to male DC adaptor. Could I do this without having ...
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305 views

Some questions about a terminal block voltage and maximum ratings

A screw terminal distribution block is shown below: A three phase motor driver manual specifies "connector voltage" and current for mains voltage connections for the motor. They specify current as ...
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419 views

Pin identification of transistor and transformer from photo of module

From the photos of this driver board (no hands on testing, the photos are all I have to work with), how can one reason-out the E, B, and C functions of the pins (1,2,3) of the transistor, and the coil ...
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4k views

How are terminal blocks depicted in a wiring diagram?

I have started to document the electrical system in a custom machine that we own. I'm using TinyCad for the schematic and that's working OK. I also want to create wiring diagrams to represent the ...
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243 views

soldering a 12V plug cathode

I cant seem to properly solder a stranded wire to that cathode terminal. Checked the answer https://electronics.stackexchange.com/a/90605/35737 - fluxing it did not help and solder does not adhere to ...
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75 views

Wire / terminal connections

I have this power jack socket. I would like to connect wires to the terminals permanently and to have a stable connection. I searched for a connector that would fit with the terminals of the power ...
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76 views

Pad shape for spring loaded pin

I'm going to use spring loaded pins (https://www.digikey.com/products/en?keywords=811-SS-004-30-002101%20) for interconnection between miniPCIe and base board. They are going to be mounted on base ...
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Why did spilled coca-cola on a terminal strip cause this odd voltage problem?

I recently repaired a vending machine that had coca-cola spilled on a terminal strip. A 9.5V source from the strip measured correctly on a DMM when there was no load on it but dropped to 2V with its ...
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soldering wires to 12 V car plugs?

Many of the cheaper lighter adapter plugs do not come with screws for connecting the wires to them, but rather with just the bare metallic contacts - to which I am supposed to do what, solder the plus ...
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58 views

Connfly 50-mil IDC mating part (types of socket/connector pairs)

I am unable to find the right mating part (connector) for this 50-mil contact pitch (supposedly) IDC socket. The groove in this particular socket has an offset, and I am unable to find any connector ...
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Molex 5556 vs. 44476 Terminals for ATX / EPS connectors

I'm looking into terminating a custom-length power supply extension cable to make everything look nice / fit in an awkward case. While researching parts I noticed that the EPS12V v2.0 specification ...
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When do I connect to negative terminal or ground?

Easy question (or at least I think). I've installed a siren in my vehicle which calls to pull power direct from the 12 volt battery. I currently have the circuit completed by connecting to the ...
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1answer
331 views

UART in Linux: Keep sending for a long time while message is short [closed]

I have written a program which can send and then receive the message just sent from the UART port and I have connected the TXD to RXD together of the same UART port. It has three parts, which are the ...
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511 views

VHDL: Receiving Data from Terminal to FPGA using TTL

(I posted same question in stackoverflow but didn't get right answer) I'm newbie in VHDL. So today, after UART Tx, I tried to read Datas that coming from Realterm terminal. I only wrote Rx codes to ...
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390 views

VHDL Sending Data from FPGA to TTL

I asked same question in stackoverflow but didn't get any good answer. I'm newbie in FPGAs and VHDL. This time, I m trying to send Data from FPGA to TTL. I' m using GPIO pins for TX and GND and Data ...
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652 views

What is the terminal labelled “U” in some autotransformers?

I'm trying to wire an autotransformer for usage as a speed controller for a brushless motor fan. The terminals are quite self explanatory: Pe for ground, ...
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Why is the plastic around my battery terminal melting?

I am using 2 dry batteries for my backup UPS. For some reason the plastic around one of the terminals of a battery is melting and producing a lot of smell. Most of the times it works fine but at some ...
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Installing (and soldering to) PTFE (teflon) Insulated Terminals

I am doing a condenser microphone board project. Now I need to install two PTFE insulated terminals (these are in the picture) to a board. The holes are a little larger than the bushing of the ...