Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [connect]

24 questions
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Mating cycles - alternatives to standard connectors

During my search for an IP22 or higher connector for SMT assembly I have realised that there are few options except USB and audio jacks that can take >1000 mating cycles. I don't want a standard connection like USB and audio jacks due to the fact…
NoobPointerException
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Micro USB b connection detector

Is there a way to detect if there is a Micro USB B cable physically inserted into a micro USB B receptacle, even if it is just a cable (with nothing attached to it). in android device
mohan
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How many WiFi networks can operate concurrently?

Very hard information to find since Google always falls down in how many devices can be connected simultaneously to a single one network. Is there a limit to how many different WiFi networks can work properly in the same place?
Cinn
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connecting single phase motor to UK mains AC

I have a single phase single volt (UK 220-240) 1Hp electric motor with two capacitors, start and run. As photographed. This is to run my Milling machine. I need to connect the motor, via appropriate switch gear, to mains AC. I appreciate the…
user232501
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EAGLE - how to make ground planes to connect to the smaller PADS

I cant fid how to configure the GND polygon to connect to smaller IC pads: EDIT Following the @Dave Tweed answer the result is exactly as I need:
0___________
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Connecting a 240 V PIR motion detector to a Raspberry Pi

I want to connect a 240 V PIR motion detector directly to my Raspberry Pi 3. Inside its plastic case I found two PCBs. One is the power supply board which has a 24 VDC relay, an S9013 NPN transistor, some blue resistors, two small zener diodes and…
devlime26
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Bluetooth LE losing connection

I'm developing a device that operates with Bluetooth Low Energy (BLE). It has a connection loss problem, where it connects and stays on for a while, but most of the time it connects and then disconnects. There is no time to be able to transfer…
wBB
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Connect 3 mm jack with 4N25 optocoupler to 8 Ω speaker

I want to take an audio signal from a smartphone's 3 mm jack plug, pass it on to a 4N25 optocoupler,, and get the sound from an 8 Ω speaker. I don't know how to connect them to each other. Can you help me?
Osman Efe
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Which connector is this three connections inline XS 20 marking

I can't find the connector type of this part found on alibaba for which I need its mate. I have it in front to me. body is 300mil width and about 200mil thick. Pin spacing 2.5mm (NOT 100mil!!!!) There is a marking of XS 20 on the side of the…
lode
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What is the bare minimum number of pins needed to connect to an ILI9488 TFT in order to turn on the LED backlight?

I've bought one of these 3.5" TFT panels: and an accompanying 40-pin FPC-to-header adapter so that I can plug it into a breadboard (specifically, "ILI9488 no touch"). I've got a project I've been working on that uses the fairly typical module that…
Dan Forever
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How could I connect an LED to a USB Type C connector?

I’m trying to connect an LED to a USB connector, so when the cable connected, the LED lights up. I was planning to do this on a USB type C cable. How could I do this without ruining the cable functionality?
Dmb94
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Arlec grid connect bulb and power points DC convert smart WiFi hack

These devices works off 240V AC. I was looking to convert them to run off DC and keep the grid connect app function. https://www.bunnings.com.au/arlec-9w-950lm-4000k-grid-connect-bc-smart-globe_p0136183 I don't really want to play with live AC so…
lara
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Help! Why don't my connections show up on my pcb gerber files? But they show up on the Eagle layout?

Below is a screenshot of my Eagle pcb layout. and below that is a screenshot of my gerber file extracted from pcbway.com As you can see none of the connections show up but they do show up if I take off the red polygon layer. But I need that layer…
DRC
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Is there anyway to get a more solid connection from pads to planes in Eagle pcb layout?

Below, in blue and white, is the suggested pcb layout from the data sheet: https://www.mouser.com/datasheet/2/468/RPX_1_0-1903909.pdf and here is my pcb layout from eagle as you can see in the data sheet example the blue plane fully encompasses…
DRC
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My daughter's science project is to charge AA batteries with a solar panel

We bought a 0.5 watt solar panel with 4.5 V, a 4 AA battery holder and a 15 ampere Schottky diode 45V , and 4 lithium ion rechargeable batteries. We connected the red positive solar wire to the diode. We assumed the end of the diode with the silver…
Christine Chen
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