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

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1answer
39 views

Visaton speaker, how to wire up [closed]

I just got some Visaton speakers in the mail. But I'm not sure how to solder on the + and - wire. There are four solder blobs (as seen in the picture below). To which ones do I solder?
20
votes
3answers
542 views

What's a schematic (compared to other diagrams)?

What's the difference between a schematic, a block diagram, a wiring diagram and a PCB layout? Why do engineers want a schematic instead of a wiring diagram? Where does Fritzing fit into this?
0
votes
1answer
31 views

Slice of Pi wiring

I'm trying to wire a Ciseco Slice of Pi. I need to break out the 3v3, 5v and GND solder pads as I need several of each. There's no track between the pad and the holes I want to use. I could wire ...
1
vote
2answers
65 views

Daisy chain (parallel) of IR sensors

I've got 5 little Sharp IR sensors I need to wire to an Arduino. These are the sensors: https://www.sparkfun.com/products/242 Trouble is, I need to put the connections in a relatively small area. ...
0
votes
1answer
66 views

What would cause SRAM to have no errors when 5 of the bits are high?

We have a SRAM (8bit by 512k chip, 19bit address) connected to a XMOS micro-controller using a ribbon cable soldered on both sides. The xmos micro controller is a startKit and the sram chip is a ...
1
vote
1answer
66 views

Breadboard Wiring with Seven Segment Display

So I'm planning on building a skee ball machine and as I've been looking into it I've decided to use some seven segment displays from here: As I've looked into this more I know I need a breadboard ...
0
votes
1answer
50 views

How do I wire up this relay?

I'm making this circuit: I've bought an Omron G5LA-1 non-latching SPDT relay. It looks like this (from the datasheet): I'm struggling to figure out how I wire this up though. I believe I need to ...
1
vote
1answer
82 views

Photodiode Array Wiring

Sorry if this is a basic question. I would like to use photodiodes to precisely measure changes to light amplitude using an Arduino, similar to Figure 2 here: However, I would like to wire six ...
1
vote
1answer
92 views

Guitar pot wiring

I was about to wire my guitar using this official scheme and I can't seem to understand it properly. I get that the signal is going through the black wire to the volume pot, but how does it get (and ...
1
vote
1answer
62 views

Red for +ve, black for 0v, …which colour for -ve rail?

I'm bodging together a bench PSU from an old server PSU, about to order a mixed bag of terminal posts for the front panel but then tripped over the problem that I'm not sure what's the correct or most ...
3
votes
2answers
156 views

Explosion proof enclosure wiring

I am currently working on a device that is to be used in hostile environments. It needs to be explosion proof. Our team has decided to place our instrument in this housing shown here. ...
1
vote
1answer
61 views

Thermal Johnson-Nyquist Noise Generator

I have no background in electrical engineering so please bear with me. I want to create a random number generator/displayer using a resistor. My idea is to wire a resistor to an amplifier of some ...
2
votes
2answers
131 views

How to join high current wiring?

I need to join 4 wires together: a 6 gauge wire, two 10 gauge wires and a 22 gauge wire. The 6 gauge wire is the current source, the two 10 gauge wires will draw a continuous current of up to 30A and ...
2
votes
1answer
72 views

Changing iron's pilot lamp connection, will it still work?

I have restored a Rowenta E5291 heavy clothing iron, a remake of a vintage model, and I changed the pilot lamp's connection. I made this change because this iron can never be turned off unless you ...
0
votes
3answers
134 views

Why is this switched power inlet fused on both load and neutral sides?

I've purchased a Schurter 4304.6090 power inlet for a project and am a bit confused by the fuse configuration. The inlet requires two fuses: one on the load side and another on the neutral side of the ...
3
votes
3answers
224 views

How is transition from three-phase distribution without neutral to three-phase consumption with neutral achieved?

A typical distribution grid supplies 6 or 10 kilovolts AC to a substation near the consumers. This is typically done with a three-phase line without neutral - just three wires going in parallel. Then ...
5
votes
3answers
158 views

Removing solder effectively

I have an Epihpone (Les Paul 100, fairly standard) electric guitar, which over the years have gotten to suffer from a non-functioning bridge pickup. I verified this using an ohm-meter, the result ...
4
votes
2answers
170 views

Altium says my labels are floating

Been using Altium and multi sheet projects for a while. My latest project involves a lot of signals so I'm trying to keep things tidy using lots of labels, ports, busses. So I have a bus for enable ...
0
votes
2answers
58 views

Correct Part for Connect an Two-Pin LED or Switch

Quite simply what I'd like to know is, what is the technical information for the male connector that corresponds to the following plug: The male connectors (headers?) are commonly found on computer ...
1
vote
3answers
162 views

How do the windings in a residential transformer create a neutral and why are the hots opposite phase?

Pretty self-explanatory I think; just wondering why neutral "manifests" from the windings and why it "outputs" (for lack of a better word) a negative-phase hot? I guess my perplexity comes from ...
-2
votes
2answers
368 views

Can I shorten a length of C9 Christmas lights? [closed]

I have a string of 25 C9 LED Christmas lights, and I'd like to shorten the string. After untangling the string, they seem to be wired like this... simulate this circuit – Schematic ...
0
votes
2answers
79 views

How do I put in a volume control on this wired phone headphone set?

I have this headset which I use with a cordless handset. The problem is the volume is way too loud even if I turn it down all the way on the cordless handset. There are no controls on the headset. I ...
-1
votes
2answers
136 views

My first transformer causing safe fuse to go out

I found a fairly big, old transformer. I unwinded all the coils and winded them again. My primary coil has 20 turns, and the secondary coil has 200 turns. I didn't use any tools while doing this, so ...
0
votes
4answers
145 views

Can AC current be switched using SPST EM-relay controlling “live” wire alone?

Perhaps the most fundamental question of the day, but here goes. Assuming that I wish to switch (ON/OFF) 3 AC loads, using EM-relay, can a SPST EM-relay (or appropriate rating) be used where only the ...
1
vote
1answer
288 views

Connecting RJ11 plug output to Arduino

Newbie question. I have a Davis 7852 Rain collector that measures Rainfall using a Reed switch. The output comes via an RJ11 plug with following pinout Black - Unused Red - Switch terminal Green ...
6
votes
2answers
211 views

Need a Loud Electrical Component for Magnetic Lock

On our main front door at the Stack Exchange offices we have a glass door with a magnetic lock installed. As is common at offices, visitors can ring a doorbell and then our receptionist will press an ...
4
votes
1answer
182 views

What is this device included in my Arduino parts Kit?

It was included with the light emitting LEDs so I assume it also gives off light? I understand the the shorter prong goes to negative/ground and the positive prong is longer, but this little thing has ...
0
votes
0answers
163 views

Use Dell Laptop internal speakers with Raspberry Pi

I have some speakers from an old Dell Latitude D600 that I and a friend took apart (his brother had managed to fry the motherboard?!!?) and so we salvaged some parts, one of which is the speakers. ...
0
votes
2answers
156 views

What can I use for temporary wiring harness?

I was a computer science major in college, and dabbled in EE related stuff where necessary for coursework, but I'm working on a small Arduino project for Halloween and need some advice. I've got an ...
0
votes
1answer
264 views

wiring a blender motor

So I've salvaged a motor from a blender that was not in use- the only thing is I haven't got a clue how I would wire it. I want to make sure I have the correct setup, since it operates at 230V. So my ...
0
votes
1answer
152 views

8 ohm amp to 4 ohm speaker

I got amp which produce 2 x 30W output on 8 ohm. Is it possible for each channel to connect 60W 4ohm speaker? Is it possible to do such thing and how I can wire it?
0
votes
1answer
106 views

Is grounding needed when using adapter to phone?

I am doing research on an audio plug. I wonder, is it a must to connect grounding circuit from handphone to the earphone if we use an adapter (image 1). Or can I do the connection like in image 2? ...
3
votes
1answer
110 views

Connecting Arduino to GPS Chip with Single Pin

I was given an old Garmin GPS unit from a friend and decided to tinker around with it and see if I could connect the GPS chip up to my Arduino to use with their GPS library. Problem is, the chip ...
10
votes
3answers
446 views

What is the difference in this specific breadboard wiring?

As an absolute layperson in electronics I just found out that an LED only lights up when connected like in figure 1 but not when connected like in figure 2. And I just don't get why? I know an LED is ...
0
votes
2answers
450 views

How to do a loopback test of a parallel port?

I have connected pin 2 to pin 3, pin 4 to pin 5, and pin 6 to pin 20. Can someone please tell me if this is the correct wiring for loopback testing a parallel port? Ia am using BurnInTest 7.1 Pro by ...
3
votes
1answer
253 views

3 Wire Fan Tach, why using only one wire gives a signal?

I have a Sparkfun Power Shield for 12v fan powering, controlled with a BeagleBone Black. As I haven't been able to read the RPM with this setup, I added an spared Arduino Uno to do this, and also I ...
4
votes
1answer
175 views

Why bridge the GND wire on a DE-9 connector?

Why would someone want to bridge the GND wire to the metal shield of a DE-9 connector? Take a look at the picture below. A 10 position flat ribbon cable is soldered to a DE-9 connector (male). On ...
4
votes
2answers
240 views

Why wrap wires around a magnetic donut on a wiring loom?

Can anyone tell me why you would wrap wires around a magnetic donut on a wiring loom? There are 3 wires running on the loom, they run from a power source to the stator of a direct drive washing ...
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votes
1answer
82 views

Ground Wire Installation [closed]

Currently I do not have ground in my house wiring. I am planing to install ground wiring but the floor around the main service panel is cemented and I don't think I can place a ground rod in the ...
-1
votes
1answer
116 views

How are wires placed inside extending single-wire headphones?

I'd like to know how wires are placed inside the part that connects left and right ear pieces together that allows them to extend significantly without any problems. Here's the type of the headphones ...
19
votes
2answers
1k views

Is the neutral wire considered safe?

If the neutral wire carries current, why do many people believe that it's safe? I've heard "You can touch the neutral wire/bar in the breaker box and not get shocked. Only the hot can hurt you." If ...
0
votes
0answers
73 views

Wiring photoelectric sensor WL260-S270

I have two Sick WL260-S270 photoelectric sensors. As simple as it seems I have trouble wiring them. I have checked the datasheet and connected 12 V DC to pins 1 and 2. Isn't terminal pin 1 the ...
5
votes
2answers
149 views

Is UTP of any benefit for RS-232?

I have an RFID module I want to mount in the driver's window of a car. It connects to a box that will probably be in the footwell. It uses 5v RS-232. Given that RS-232 isn't balanced, is there any ...
-1
votes
1answer
43 views

NEMA connector adapter [closed]

I was thinking about buying a commercial griddle to use in my home to expand my cooking space but I found out that it has a NEMA 6-15 type plug instead of the typical NEMA 5-15 found in homes. Since ...
0
votes
1answer
102 views

How should a radio receiver be used to detect damage to concealed wiring?

Several structures hereabouts date back to the mid 1920s. Electrical wires were insulated by cloth winding, and embedded in Wooden Trunking With the passage of time the cloth rotted away in some ...
1
vote
1answer
93 views

USB and 9V DC out of a sealed box

I´m making a small box that has to be completely sealed with no holes on them. On the inside of the box is a circuit board which requires 9V DC plug and there is also a USB connection from the board. ...
2
votes
1answer
116 views

How to discover electrical wires?

An electrician told me that some companies has really expensive equipment to be able to map how the electrical wiring is structured behind walls and floors. I wonder, how is this equipment made? ...
2
votes
1answer
843 views

2-bit adder and Multiplier

I am trying to wire a 2 bit adder and a Multiplier on my breadboard. I have the 2 bit adder somewhat done, but dont know where to start on the multiplier. I need help reading circuits and translating ...
2
votes
1answer
310 views

Concerning broken headphone wires

I am planning to fix my broken headphones. They don´t really work in my laptop unless I twist the plug-in wire to a certain position and hold them there. I think it´s just a broken wire somewhere ...
3
votes
1answer
206 views

Need Help: Wiring LEDs with 2 source voltages

I have a series of LEDs I would like to have display at 2 brightness levels and am confused how to properly wire this. This is for additional running lights/brake lights on my bike. LEDs - Typical ...