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

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2
votes
2answers
70 views

Wrapping wires with nylon / wax string

In some applications I have seen a group or small bundle of wires wrapped with a black nylon and wax covered string. I am making some small bundles of wires and would like to make the wraps instead ...
1
vote
3answers
49 views

Wiring a relay for mains power

I want to make a plug that I can turn on and off with a micro controller like a raspberry pi. I picked up one of these http://www.radioshack.com/radioshack-15a-12vdc-125vac-relay/2750031.html And the ...
0
votes
1answer
44 views

Breadboard Jumper Shortcuts

This is my second question relating to this project. I am trying to make this project in the breadboard first, yet I am having trouble connecting all the resistors, and DIP switch connection with as ...
0
votes
1answer
28 views

Relay sla-05vdc-sl-c is not working on arduino uno and nano

At first time, trying to check this relay modules (I got 2 the same) they both worked nice - no problem. But now I am going tu build the temperature controller for old fridge (it is working ...
0
votes
1answer
61 views

Power supply automatically disables before the fan has time to reach the minimum current

I bought a power supply, which provides 5, 12 and 24V. The issue is that it has a disable if there is not a minimum current on the output after a certain amount of time. After testing with a resistor, ...
0
votes
3answers
97 views

Why use Optcoupler + Mosfet?

I saw this project: http://diyhacking.com/arduino-lamp-dimmer/ which I'm interessted to(except that I will have to use some 24V, still enough to hurt the Raspberry Pi). There is several things that ...
0
votes
3answers
54 views

Wiring multiple peltier units

First of all this question relates to powering Peltier units and not the physical relationship. I have two Peltier units and a 320w 12v supply similar to this the units are TEC12715. They are ...
0
votes
2answers
54 views

How to wire circuit DC Motor with LED

I'm trying to learn a bit more about forward voltage and OHM's Law but I'm not sure how to wire this circuit. I have: 1 x 4.5 DC motor (Operating Volts: 1.5- 4.5V, Nominal Volts: 4.5V, Current (no ...
0
votes
2answers
68 views

Ceiling speaker has 3 wires

I recently bought this ceiling speaker (http://www.3acctv.com/upload/uploads/Specification/T-103C.pdf), as shown in the PDF it has 3 wires attached to it. I am no expert in this, so I was wondering if ...
2
votes
1answer
54 views

Wiring the Mean Well RT 125D

For some projects with the Raspberry PI 2, for which I require 5V+12+24V, I baught the Mean Well RT-125D I put the switch in order to have "230V" displayed, as in my Country, the voltage is 230V. I ...
0
votes
0answers
34 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
17 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
vote
3answers
56 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
votes
3answers
53 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 ...
0
votes
1answer
60 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
24 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
votes
1answer
33 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
119 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
58 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
42 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
60 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
109 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
59 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
113 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
40 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
153 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
votes
0answers
44 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
votes
2answers
70 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
140 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
222 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
votes
3answers
156 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
votes
2answers
109 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 ...
-1
votes
1answer
129 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
votes
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
68 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
197 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
89 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
57 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
170 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
votes
0answers
38 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
votes
0answers
38 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
97 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
votes
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
73 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
28 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
95 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
145 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
659 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
62 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 ...