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

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0answers
37 views

DPDT relay for making mr mirror move up,down,left and right [on hold]

I'm supposed to install a mirror on one of our helicopters and it has to move up, down, right and left. The mirror company provided us with two DPDT relays. I'm using a four way switch with the center ...
0
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0answers
32 views

Why does this smart card use antenna with different space between turns along different sides?

I've extracted and zoomed to 400 percent parts of image from this post. The original image features the inner parts of Visa PayWave enabled smart card. Here're card corners zoomed to 400 percent so ...
0
votes
1answer
16 views

ws2801Can I send data in any direction

I have bought a series of LED's they look like this. I'm working to make a bunch of modular floor panels. And I need to be sure that if I flipped the wires around it's not going to screw up the LEDs ...
1
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3answers
50 views

Best solution for compact wiring on stripboard

When transferring a circuit from breadboard to stripboard, I often struggle to manage the wiring; often it starts looking like an overgrown garden; the components inevitably start disappearing under ...
0
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3answers
39 views

Battery Wiring - 3 Independent systems with common ground

Background: Building a radio control wheel bot. Using a motor controller that recommends independent power supply for 1.) power to the controller and 2.) power to the motors. Also want a 3rd power ...
-1
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0answers
21 views

Data hub setup for a structured wiring panel [migrated]

I have a structure wiring panel in my home and the bedrooms and living room all have ethernet jacks. All the coaxial cables in the panel are labelled as: 1, 2, 3, fp1, fp2, and 2 cables called emarc ...
0
votes
1answer
51 views

Multimeter showing negative voltage on servo connection

I am trying too get my first (ever) servo sweeping back and forth and for some reason am having enormous difficulty with the wiring. In the Fritzing pic below, I have the circuit connected (both + ...
0
votes
1answer
23 views

How to bypass S-type connector for connecting a servo to an MCU/SoC

I have a TowerPro SG920 servo that I'd like to connect to an MCU/SoC (Pi or Arduino). However, the servo has an "S-type" connector (see pic above) and its 3 wires (red, black and orange) are ...
0
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1answer
32 views

How to determine servo signal encoding

I have a TowerPro SG90 servo which matches the "JR" brand wiring discussed here where the servo's 3 wires are as follows: Red is + Black is ...
2
votes
1answer
83 views

wiring AC switch with DC led

This is a follow up to a previous question I had answered. I'd like to show the following diagram. Here, I have laid out (crudely) a diagram that has 120v-110vAC from the wall going to a push ...
-1
votes
1answer
45 views

What is the right way to wire a power inlet to a switch to a dual-primary transformer?

I have a fused power inlet with a voltage selector (Schaffner FN1394-10-05-11). I want to connect it through a separate DPDT switch to a transformer with dual 115V primary windings, and make ...
0
votes
1answer
41 views

+ve & -ve vs 5v and GND

I am learning hardware form a software background (playing with Arduino) and I am having difficulty remembering absolute wiring basics. Bu board has a 5v and gnd pin, whilst my component has + & ...
1
vote
3answers
53 views

What makes cables suitable or unsuitable for a given purpose?

I've been working on a homebrew set of VR Goggles w/ head tracking, and am just beginning to plan the cable that will connect the parts on the user's head to the electronics on the main unit (which ...
0
votes
2answers
95 views

How to solder wires to a hobby motor

I am using the cheap 1.5-3v motors from radio shack and I try heating up the connectors on the motor, but I think they are melting inside because in one case the pole now wiggles, and the other case ...
0
votes
1answer
53 views

Output voltage on pin 14 (A5) address input pin of SP0256

I'm playing with an SP0256 speech synthesizer. Ive bread boarded and am checking all my connections (as it doesn't work) and have found a very strange thing. Pin 14 of the IC being driven to ground. ...
0
votes
1answer
72 views

Wiring a step down transformer

I have a Transformer with the following writing on top of it : TFM-00053 CLASS B 130°C Z150H E154515 LEI-4 8B25 it has three thick wires on one end : Blue Brown Red ; the resistance ...
0
votes
1answer
37 views

I need help understanding how this stepper motor circuit works

This is my first time working with stepper motors. The motor in question is a Portescap 55M048D1B (source: http://www.digikey.com/product-detail/en/55M048D1B/403-1016-ND/417823). I am having trouble ...
1
vote
3answers
123 views

How to wire screw type banana jacks

I recently purchased some of these: Digi-Key Banana Jack. Unfortunately, I'm new and there isn't the supporting documentation I need to be able to determine how they're to be used. Unlike other ...
0
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0answers
43 views

What's the purpose of these peninsula-like areas in this smart card circuit?

Here's a scan of a stripped MIFARE Ultralight smart card. Note the underlined peninsula-like areas. They are simply connected from one end to the antenna track. They don't look like a patch antenna ...
5
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2answers
69 views

Why is outer turn of this smart card antenna wider than the other turns?

Here's a scan of a stripped MIFARE Ultralight smart card. Most of the wiring is the antenna which effectively consists of a single spiral track. The outer spiral turn clearly is a bit wider than the ...
2
votes
1answer
54 views

How to test/flash many modules?

Suppose I have several hundred pieces of the same module to test and flash, and the connectors themselves have wire holes in them like below. What's a good way to make the connection without ...
1
vote
2answers
122 views

IC pins too small for my breadboard

I recently bought some IC's with 8 and 16 pins. I was used to work with bigger ones, so now I cant test them in the breadboard without soldering an individual wire to each pin (which would probably ...
0
votes
1answer
87 views

Correct wiring for 3 wire single phase motor

I have a single phase 3 wires ( + ground ) submersible pump , I need to understand the correct wiring what type of motor is this and is the capacitor important ? the previous owner was not using this ...
0
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3answers
115 views

Wiring Emergency Stop button to disconnect two independent circuits

I am trying to use one emergency stop switch to disable two batteries that function in independent circuits. My circuit diagram is attached below. A motor controller connects to each of the exposed ...
0
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2answers
90 views

Help wiring multiple different colored LED lights

I am working on a project right now, and it is the first time that I have worked with wiring anything. I have 70 LED lights. 10 red, 10 orange, 10 yellow, 10 green, 10 blue, 10 purple, and 10 pink. I ...
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1answer
80 views

wiring for a 4 wire AC motor

I have a working garage door opener and I'd like to use its motor for building a edge sander (woodworking). The model number is the Genie IMS1000 and here is the actual picture. It has a single ...
0
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0answers
34 views

New guy on the block…first project

So I am building boom box out of an ammo can. I want the ability to be able to use external power or battery power, with the option of using a switch to go from one or the other. When on external ...
0
votes
1answer
59 views

How can I tell the full spec of my step motor just by looking ati it?

I have a retro CNC machine (EMCO F1P) in my garage that I am currently tinkering with. I would like to replace the old motor control but use the existing step motors. Unfortunately the documentation ...
2
votes
1answer
170 views

Playing WAV audio files from an SD card on Wiring board?

I'm using the Wiring framework for building a custom alarm clock. So far, I've been able to work with several Arduino libraries on Wiring, just by including Wiring.h instead of Arduino.h, as ...
2
votes
1answer
87 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 ...
-2
votes
1answer
53 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 ...
0
votes
2answers
138 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
36 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!
0
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0answers
37 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
votes
1answer
80 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
2k 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
69 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
27 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
votes
2answers
81 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
votes
2answers
134 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
vote
2answers
559 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
votes
0answers
59 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
vote
1answer
63 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
votes
1answer
88 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
votes
2answers
54 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
222 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
votes
3answers
338 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
87 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
91 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
votes
1answer
64 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 ...