Questions tagged [long-distance]

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TCA9517DR on I2C for long distance wiring with high capacitance bus

I have a CAT6 cable that was used for old temperature sensors that works with 5V I2C at 25/30 meters from the main MCU with cable pairs that brings VCC-GND-SCL-SDA. Here is the schematic: I've tried ...
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1answer
53 views

Waterproofing a cat5e/6 repair

I have a 1200 foot long outdoor direct burial network cable running through an outdoor environment that ranges from dry to 6+ ft underwater depending on the year and season. (Currently it is a foot or ...
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0answers
26 views

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 ...
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6answers
2k views

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 ...
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1answer
61 views

Interface 24V signal from one device to 3.3V signal on another device

I have a device A that sends a signal through an optocoupler, this signal travels through a 7m cable and is used by another device B that has a SN74LVC1G17SingleSchmitt-TriggerBuffer powered by 3.3V, ...
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1answer
39 views

Is it possible to use i2c accelerator to multiplexer input?

I have 10ft long wire cabled i2c 4 buses (for 8 sensors, sensor are not in the same place each has 2 i2c addresses), I try to use i2c multiplexer PCA9548A with an i2c accelerator Ltc4311, i2c ...
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0answers
36 views

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 ...
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1answer
51 views

Long Range Bus for Raspberry Pi

I wish to measure the rotational speed and electrical current used of/by industrial components. Those components are driven by strong electric motors. The solution should be cheap and fast to ...
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1answer
70 views

Sensor 30 meters away

for my home automation project i'm using 10 Sensirion SHT21 Temperature and Humidity devices, those devices are distant 30/50 meters away from my ESP32. Those devices are driven using 5V and at both ...
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1answer
45 views

Can the button still work if being far away from Pull-Up Resistor?

Here is the illustration for pull-up resistor, I am wondering if the button still can drain the input voltage to GND when the wire between button to MCU is very long which increases the impedence of ...
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0answers
42 views

PWM drive of LED strip through long wire

I plan to drive a 12V/1-2A single color LED strip. The driver system will have MCU/MOSFETs like this https://www.makeuseof.com/tag/connect-led-light-strips-arduino/. The question is what MOSFET and ...
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0answers
43 views

Powering long-distance sensor bus

I need some help with my project. I'm building an outdoor sensor network with a bus topology. Every sensor node is a 3.3V system which contains an MCU + the sensors + transceiver. For communication, ...
3
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4answers
362 views

multiple Open Drain UART over long distance [duplicate]

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 ...