Questions tagged [cat5]

For questions about category 5 ("Cat 5") twisted pair cables for computer networks. Use in conjunction with the "cables" tag, and consider using associated tags such as "ethernet".

For questions about category 5 ("Cat 5") twisted pair cables for computer networks. Use in conjunction with the tag, and consider using associated tags such as .

See Wikipedia's article about category 5 cables for more information.

12 questions
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Long-distance Arduino buttons crosstalk over Cat5e cable

I am developing a hardware system where an Arduino sits in the server room and communicates with the main computer via USB/serial. Users can push buttons at remote panels to trigger different functions on the computer. The furthest remote panel is…
TecumTechCEO
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The best way to light an LED at a distance

I need to control an LED (SSR) at a someway-long distance of about 20 meters (60 feet) from a microcontroller. A simple LED on/off control type where I could keep it on for a long period of time. The cable is running inside the walls in a house. I…
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2 answers

RS422 CAT5 Cable shielding connection

I have a question about shielding an ethernet cable. I have to go from point A to point B with a CAT5 or CAT6 ethernet cable, the cable is used for a RS422 link (two pairs). On the sides of the cable there are two DB9 type connectors. The cable also…
Federico Massimi
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Can I use ethernet cat5 wire as a medium to drive USB3 data?

I have a prewired ethernet in my living room wall. I am trying to see if I can access an external hard drive in one room from a PC in the other room. Assuming range is not an issue (they're about 8 feet away, is it foolish to think I can just…
BobLobLaw
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9 wires in a CAT5e cable?

I just cut open a CAT5e cable since I wanted it for a project which required several twisted shielded pair cables. To my surprise there were 9 wires with isolation? I was under the impression that there were 4 twisted pairs, shield and possibly a…
LukasL
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Ethernet Surge Protector Speed

I've been investing in some new surge protectors lately – a fraught process at best given the difficulties of comparing model and brand quality. Things were even trickier when looking into ethernet (rj45/cat5e) surge protectors, so I fell back on…
fedora
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Cable selection and wiring for RS485 communication

I'm designing a sensor system where each sensor communicates via RS485 MODBUS in a high-density environment. Each line consists of 18 sensors which then goes to a gateway (Elfin EE11) that converts RS485 into ethernet which then goes into a server.…
Max
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Exceeding 5m for USB 2.0 Full Speed

USB 2.0 Full Speed (12Mbit/s) and USB 2.0 High Speed (480Mbit/s) are both specified as having a maximum cable length of 5m. Why does Full Speed not allow a longer cable length, given its much lower bit rate? (I'm assuming that it's a voltage drop…
fadedbee
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1 answer

RS-485 bias & termination resistors with 3.3v transceiver and 100 ohm cable

I am trying to connect two boards together with a few feet of Cat 5e cable. Both boards will be using 3.3v RS-485 transceivers (ISL83483 or similar). Using this calculator, I entered 3.3v for supply voltage and 100 ohms for Rt1. It gives a negative…
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Using CAT5 cable for low current, CTs in mains panel, and in general

I couldn't find anything searching on the internet, I suspect it's either because the question is so stupid it doesn't warrant an answer... But I don't know whether it's obviously not a problem or obviously crazy dangerous and you would never…
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Are T568A/T568B Cables Compatible with USOC Cables?

Is it a good idea to use a USOC cable in the same network as a T568A/T568B cable? I can't seem to find anything about this on the web.
FailingCoder
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Total length of cable to connect 1-wire DS18B20 sensors without problem

Based on this topic and the connection that is proposed I would like to make two questions (if somebody has face the same problem/task). So can I connect the data cable to a raspberry GPIO and then the voltage and GND to an external power supply or…
hmmy92
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