Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [long-distance]

24 questions
22
votes
8 answers

Single wire (no ground wire) long distance low frequency communication

In a cave we are currently exploring, there is a temporary siphon that sometimes blocks our way. I was thinking about monitoring it (pressure sensor or other level sensor at the siphon, transmitter via mobile phone outside the cave.) The problem is…
Sandro
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6
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2 answers

Transmitting VCC and GND signals for use with RS-485

The specific question I want to ask is whether I can transmit VCC(5VDC) and GND power signals for powering the destination circuit (in an RS-485 arrangement) or not. The power lines will be grouped with the differential signals of the RS-485. For…
Maneesh Verma
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6
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6 answers

Understanding voltage drop

Meanwhile in quarantine I been trying to learn about electronics. I am still not able to understand the voltage drop when it comes to long wires. My goal is to be able to send a 5v signal over a very long wire. I have read a lot about Ohm's law,…
Tono Nam
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5
votes
8 answers

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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3
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4 answers

multiple Open Drain UART over long distance

I have 9 microcontrollers ATMEGA3208 and I have connected the RX and TX lines of 8 of them in parallel. My configuration is in master-slave. The master microcontroller send data to one of the 8 RX lines but only one of them can respond at a time.…
MrBit
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2
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2 answers

level-shifting daisy-chained data line from 5V to 24V for long distance communication stability

I need to daisy chain several WS2811 chips with distances up to 20-30m in between. Every unit has a WS2811 chip that drives 3 DIO5151BCD10 LED drivers to control a high power RGB led. To account for voltage drop, a 24V line runs between the units,…
WhiteSpin
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2 answers

Is it necessary to use a pull down resistor with this BTS7960?

I have an Arduino Nano controlling a BTS7960 that is 10 meters away. I have one 24V power supply. Both the Arduino and the BTS7960 get 5V through a an LM2596 step down converter. The BTS7960 "Enable" pins are hooked up to 5V output of the step down…
Snaier
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1
vote
0 answers

Very long distance analog audio transmission over cable

Summary: I want to transmit an audio signal (300Hz-3kHz) without modulation over a 10 km cable. I don't know how to. I have looked for a similar post and couldn't find any I hope I am not creating a duplicate post. I am an electronics and…
user769708
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1
vote
0 answers

Send a 60Hz trig signal over a 9m cable

I want to send a trig signal over a 9m cable, the signal is around 60Hz (each 15ms it sends a 1ms pulse). In order to avoid electrical interference I convert the 3.3V original signal with the following circuit: I have a power supply of 24V…
Pedro NF
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Noise suppress recommendation and best practices

I've developed for my home automation project this schematic: it's quite simple, an ESP32 GPIO enable pin drives those mosfets that gives power to the LED and enable the PCA9306 EN pin, for more specific info, refer to my previous question here. I'm…
VirtApp
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0
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2 answers

Buck Reg Isolation Through I2C Pullups

I have two microcontrollers on an I2C bus. They're powered by separate buck regulators. This question recommends buck regulator outputs never be put in parallel. What about through I2C pullups? If not, how might I isolate my two systems?
Schuyler Horky
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0
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1 answer

Best fit wireless technology for long range application

My project goal is to have 2 devices, a transmitter and a receiver. The transmitter should transmitter a measured distance +- every second and the receiver which could be at max. 10 miles away from eachother should receive the data. Both do not have…
Sven Onderbeke
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2 answers

I2C over long distance with RJ11 CAT3 cable: how EMI noise will effect differential (but not twisted) pair wires

I have several nodes with Cat3 RJ11 cable in my office. I need to do an I2C communication between several nodes over + 20m and read about the PCA9615 driver. Unfortunately, the Cat3 RJ11 cable has only 4 wires and there is no twisted pair. So do you…
BossGandalf
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1 answer

Does the ESP32's Long Range capability work with most smartphones?

Recently discovered an ESP32 can be its own access point (controlling or displaying data wirelessly through a web browser not connected to Internet). It also has long-range capability: Long Range (LR) Long Range (LR) mode is an Espressif-patented…
adamaero
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2 answers

Transmit digital signals over long distances using current (voltage to current converters)?

I want to transmit signals over a long distance wire. Let's imagine that I want to transmit the temperature information from the LM35 sensor over a long wire: instead of transmitting the voltage (which is proportional to the temperature) through the…
BossGandalf
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