How wires connect to terminals and to each other; coloring and organization schemes; appropriate wire selection and installation techniques

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0answers
50 views

Contactless detection of current

So I'm wondering if it's possible to detect a current passing through a specific cable inside a bunch, without being able to touch the cable at all... In other words : Is it possible to detect the ...
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1answer
43 views

What could cause sound system to occasionally become weak and mono until clicking 'Test' in Windows? [closed]

edit I am not looking for a repair, I am trying to learn about what could cause the strange behavior simply for the sake of science. Ok so I have an old Yamaha sound system that is mostly broken ...
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0answers
26 views

Integrating Extremely Thin Wires in Pages of a Notebook

I am trying to create a device that is able to connect with pages of a physical notebook. I was, therefore, considering the possibility of connecting each page with a common controller (something like ...
0
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2answers
76 views

Soldering multiple resistors in series

I'm starting the wiring for my project and would like to solder two resistors together in series. There is good chance that the wire will be exposed to heat and gentle turbulence. What is the best ...
0
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0answers
20 views

How do I power / control a brushed 115V AC motor?

How do I power a brushed 115v AC motor? Would there be any potential damage from just wiring it to just plug into the wall or do I need a transformer and a capacitor or something? Thanks!
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0answers
22 views

How to rewire a 6-port usb charging hub

For a project in school I am building a product which displays and charges any device which can run from a usb port. The problem is that I have the holes for the usb ports cut out of custom positions ...
0
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0answers
57 views

Using half of a 240v dual-phase circuit as a 120v single-phase circuit (US) [migrated]

Usually when I see a 240v device, it is wired to its own double-pole circuit breaker, with each pole connected to a different 120v phase (to provide 240v total). If there is a 120v device in the same ...
0
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1answer
47 views

Connecting components to an arduino without a breadboard

I've never worked with an arduino before, so bear with me. I'm looking to start a project with an arduino nano, and I want to keep everything as small and as light as possible. Because of this, I ...
11
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4answers
1k views

How to best attach a wire to a switch without soldering?

I've got a switch like this one: Now my (quite novice) question is: How do I best attach a wire to the connector without soldering, e.g. for quickly trying something out? Right now I've folded the ...
0
votes
0answers
49 views

Multipoint Ethernet cable as an RS485 data bus

How can I create multipoint connections with an Ethernet cable an retain the high reliability / low noise achieved by the wires being twisted in couples? I think I need to create Faraday cage, but I ...
0
votes
1answer
20 views

How to turn on gauge lights from multiple sources

I have limited experience with relays, diodes, ect. so I need a little help. I'm currently building a rock crawler (off-road buggy) from ground up and I'm into the electrical and need some ...
0
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2answers
53 views

Auto-Transformer: how to understand the following diagram?

I have a question about the CW Auto-Transfomer that I will be using. The wiring diagram is above. As you can see, the equitment takes 277/240/208/120V as input. But on its specification sheets, it ...
0
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2answers
75 views

Solenoid Valve - Transistor or Relay?

bit of an amateur looking for some advice. I looked at the other question concerning my problem but i didn't find what i was looking for. I need to switch ON and OFF a solenoid valve using my RPI. I ...
1
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2answers
164 views

Wire up multiple slave Arduino devices to a master Arduino device

I want to use serial communication between a master and multiple slaves. I've already connected the RX of the master to the TX pins of both slaves, and vice versa (thus connected the TX pin of the ...
0
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0answers
47 views

How to wire a slave circuit

I have 7 120 volt coils. I want to energize 6 of the coils independently and the 7th coil every time I energize 1 of the other 6. I have an eight momentary push button pendant (single pull/double ...
1
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1answer
46 views

compressor wiring resistance [closed]

Hi I have a standalone freezer that stopped working. It has a single phase compressor. I read that the resistances between three terminals should add up, i.e. R1 + R2 ~= R3. However, my compressor ...
0
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1answer
62 views

Need to connect neutral wire?

In 3 phase machines have L1,L2,L3,N and PE(Protective earth).some time Neutral wire is not connected to the power supply.But,Machine have a neutral wire.What will happen if not connect neutral ...
0
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2answers
50 views

Flat profile IDC type connectors and cable replacement

Hello guys I am looking to replace IDC connector on my project board with something flatter like the ones found in laptop. The problem as I do not have any guide to go around to look for the right ...
0
votes
3answers
147 views

What's the reason for wiring a relay this way?

I came across the following automotive wiring diagram: One thing I don't quite understand is the way they wired the relay. I've got two main questions. It appears to me that they used the exact ...
4
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3answers
290 views

Design of an electronic device to disable remote access ability of contactless payment cards without visible alterations and damage to the card

Question: How could I build an electronic device which disabled the remote interaction functionality of contactless payment cards while not affecting the functions which are accessed via the on-card ...
2
votes
1answer
67 views

Questions About Wiring High-Power Robotics Motor Chassis

I recently ordered a Wild Thumper 6WD robot chassis to build for a school robotics club project. I've built smaller, simple robots before, but I haven't built one with such high power requirements ...
1
vote
1answer
87 views

Wires for home theater system

May I use two 16 gauge insulated wire in lieu of one 14 gauge wire for the speakers of a home theater system? Thicker wire is better for the quality of sound (or so do they say). So do two 16 gauge ...
0
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1answer
59 views

ACS758KCB Wiring Diagram

I am using the ACS758KCB Hall Effect sensor for a project. On the front page of the Datasheet it list a .1uF capacitor between Vcc and GND, in addition it lists a capacitor, Cf, between GND and ...
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1answer
69 views

Where do I connect earth wire?

I'm trying to use this delay timer to control an exhaust fan. I have a 3 pin connection (with earthing wire) powering this fan and it works fine. If I have to insert this delay timer module in ...
0
votes
1answer
84 views

Wiring RS485/422 to RS232 converter to a given device pins [closed]

I'm trying to establish a full-duplex and then a half duplex communication and need to wire a device output to an RS485/422 to RS232 converter. Here is the device output pins for full and half ...
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2answers
242 views

How do I splice multiple (more than two) wires in-line?

When I look at many wiring diagrams, like this one: (source), I see wires which need to be connected to multiple points. This suggests that the wire will require multiple three-way splices in ...
4
votes
3answers
374 views

Shall I connect inverter with boat GND?

A friend of mine is building a boat. On this boat, he has 12V batteries with a 230V/13A transformer. Recently somebody suggested he should connect the null with the ground. With DC, this is common ...
1
vote
2answers
45 views

Wiring CanaKit Relay and Southco EM-05 Electronic Lock

I am attempting to wire this relay http://www.canakit.com/4-port-usb-relay-controller.html to this lock http://www.southco.com/en-us/em-05. I have done some work with Arduinos before, but I am not an ...
1
vote
2answers
140 views

Using LM2575 switching regulator

The LM2575 is a step-down voltage regulator. I want use it to step down from 9V to 5V in order to power my Arduino board and Bluetooth module. However, I'm not sure how to wire this into my ...
1
vote
1answer
55 views

How do I wire speakers in multiple rooms to one amp? [closed]

I would be happy if anyone can help me with the following project I wish to build : I have an old amplifier 4ohm impedance with A and B zones, support for mono and stereo and playing both A and\or B. ...
1
vote
1answer
56 views

What's wrong with my static relay connections?

Im trying to use a static relay for the first time. It is an HFS5, supposed to turn on/off at ~5V. Soldering is not clean but I have triple checked with a multimeter that the connections are ok on ...
0
votes
1answer
89 views

How can I connect a thin relay to a 220V wire?

Im almost an absolute beginner in the electrical field. I have bought a relay and wires (for a 60W light), however once unpacked I see that the relay is very thin. I have tried to use a crocodile ...
1
vote
3answers
101 views

Connecting parallel DC loads

Consider the following power supply interface. I'd like to power a number [1,N] of bitcoin miners, 12V, 5A each one. question is: do red wires must be connected with V+ pins ? do black wires must ...
1
vote
2answers
117 views

Need help identifying a strange symbol in a wiring diagram

I have this simple wiring diagram for an old tractor, and there are some symbols that look almost like diodes, but not quite. I have highlighted most of them in red in the attached image. Do these ...
0
votes
1answer
124 views

How to wire Mean Well RT-65D power supply?

I'm not very familiar with electronics. Especially I have never wired a 230 V power supply manually. There is a Mean Well RT-65D power supply. I have a rubber connector with open wires blue, brown ...
0
votes
1answer
31 views

Connecting a surround system without jacks [closed]

I have recently bought a house which has already the sound cables passing through the walls. These are raw cables without any jack connectors. My question is, when you go to buy a 5.1 surround ...
0
votes
1answer
226 views

Splicing barrel jack shapes

TL;DR: How can I "splice" two different cords for different barrel jack sizes? I'm rather new to this sort of stuff, so bear with me here. I am attempting a project where I need to create a port on ...
0
votes
2answers
824 views

How to wire up a single-phase electric blower motor

I have an Electro ADDA C80M-2 0.75kW single-phase blower motor that I need to hook up, switched, to power a cyclonic dust separator that I've built. I thought it would be a piece of cake: pop off the ...
0
votes
2answers
977 views

How to determine bipolar stepper motor wiring (came from a 3.5 inch floppy drive)?

I have extracted a small stepper motor from a 3.5 inch floppy drive, that I intend to use with an Arduino or Raspberry Pi. The problem is: initially a thin ribbon cable was attached to it, with no ...
5
votes
6answers
2k views

Why is the chassis used as ground in automotive electrical circuits

Automotive electronics generally use the metal chassis as the negative ground connector for the DC circuits. Obviously this saves something on wiring. Is there an electrical reason for this approach? ...
2
votes
2answers
457 views

Do they make triangle-shaped headers?

I've been working with some PIR sensors from Panasonic, and I was wondering if there are any types of female headers/connectors that I could use to wire the three pins of the sensor without directly ...
2
votes
2answers
241 views

Reading corresponding pins from a circuit diagram

I am completely new to Arduino tinkering and am trying to make sense on how to wire a 8x8 LED matrix using the following diagram: This chart is supposed to correspond to this 8x8 LED, 12x12pin LED ...
1
vote
5answers
129 views

How do metal cases work with connectors & isolation?

I have troubles understanding how do metal cases behave in some cases. Case 1: I made passive attenuation box for amplifier(basically L-pad resistor), simple configuration: Amplifier => attenuation ...
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votes
1answer
81 views

What will happen if i connect a bulb across 2 AC sources of different voltage [closed]

I was just trying to decode whats happening in my house wiring I have a Fault line indicator bulb for each phase,Sorry i dont know How its connected or anything ... Recently i installed Home ups And ...
0
votes
1answer
134 views

Adding diodes to easy driver stepper motor driver

I had an easy motor driver damaged by removing the motor while the drive was energized. I sent an email to Brian Shmalz to see if there was anything that could be done to protect the board in these ...
1
vote
1answer
110 views

Trigger Relay Only from one specific grounding path?

I have a car wireless door lock system I want to modify. The basic operation is that when the key fob's button is pressed, a light relay is triggered, to flash some of the car's lights, to indicate ...
0
votes
1answer
59 views

What is a good single conductor wire-to-wire connector?

I'm currently using 3-position JST connectors with two of the wires cut off, but this is unsatisfying. The 3 position JST is also bulkier than I'd like, and has lots of "barbs" and corners to catch on ...
0
votes
2answers
130 views

Running up to 40M (130Ft) of WS2801 IC LEDS

After many hours of searching the internet for information and gathering what I could, I have run into my final problem that I am having trouble finding an answer for. I have 40 Meters (130) Feet of ...
0
votes
2answers
309 views

Power supply for 144 LEDs in parallel?

I appreciate any help as I try to figure this lightbox project. I need to wire up to 144 3V (built-in resistor) LEDs from flickering tea lights (normally battery powered). Not sure how many to wire ...
1
vote
1answer
80 views

Current “jumps” from one wire to the other

I have cable with two 1.5mm wires in it. Why does my test light show voltage in both wires even though only one of them is connected to 220V AC grid. // Also there are old cables with metal jacket ...