Questions tagged [transceiver]
Both [tag:transmitter] or [tag:receiver]
156
questions
0
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0answers
7 views
Rogue resistance between Vout and GND in LDO circuit
I'm currently developing a circuit as seen here.
I had some suggestions to check my Iout to ensure that I wasn't drawing so much current that I was causing an overheat. After a little checking I ...
0
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0answers
8 views
Generate high speed data using GTX transceiver of Kintex-7 FPGA board
I want to use Genesys-2 FPGA board as a BER tester for transceiver circuits. I am using IBERT IP core available in Vivado for it. Genesys-2 has an FMC connector to provide output for which I am using ...
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4answers
75 views
Voltage Regulator Overheating
I'm currently designing a simple PCB that uses a MAX3221 to send/receive RS232 over an ethernet cable along with an optional 1-wire thermocouple reading (The thermocouple breakout can be soldered in ...
0
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1answer
39 views
Need suggestion on 2 channel transceiver 5V to 3.3V level shifter
I need to Interface multivibrator output to control input of the analog switch. Where the maximum operating voltage of analog switch is 3.6V. So I need voltage level shifter from 5V to 3.3V. And the ...
0
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2answers
31 views
Can you use a CAN FD transceiver for low speed (fault tolerant) CAN?
Fault tolerant CAN (ISO11898-3) is terminated differently than high speed CAN (ISO11898-2). Therefore the signal levels for dominant and especially recessive bits differ.
Newer CAN FD compatible ...
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0answers
36 views
nRF24L01+ radio module - IRQ problem
I have a problem with IRQ interrupts. After successful transmission, the nRF24L01+ sets the IRQ pin low (about 19 ms), but sometimes doesn't return to high:
After every packet transmission (tx ...
1
vote
1answer
85 views
How does a CAN transceiver work?
CAN Transceiver Transmit Mode
I try to understand the transmit functionality of a CAN transceiver. I found this post a good starting point, but it doesn't completely answer my question.
Block ...
0
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1answer
54 views
How to generate positive and negative power supplies from a single supply with high current driving capability?
I am trying to build a 1553 military standard bus transceiver (analog front end) and I am required to use a single power supply of 3.3 V. To be able to receive, my comparators need supplies of +/- 3.3-...
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40 views
Can failing to properly decouple a power supply close to supply pins on a transceiver cause the transceiver to power back on and transmit a signal?
One of the customers of the company that I work for has RF transceiver units that are reactivating themselves after being powered off by the switch. Due to obvious disclosure constraints, I ...
0
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1answer
51 views
Connecting CAN transceivers for devwork /home prototyping
I'm doing some home project, and would like to use this CAN transceiver (note just in case, not selecting CAN controller+transceiver chip, that's how I need it).
I would like to use this transceiver ...
0
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1answer
74 views
RS-232 to RS-485 transceiver
I'm new in communication protocols and ICs. I would like to know if it is possible to connect a RS-232 (TX, RX and GND) to a RS-485 (Vcc, A, B and GND). I only need a half-duplex communication. The ...
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28 views
LTC2852HDD Transceiver defect when the polarity is change
I have been unsing the above transceiver for our application. I have discover that when I turn the polarity of this device, the Transceiver does not work anymore or is defect, because taking back in ...
1
vote
1answer
38 views
Gearbox in 10GBASE-R Ethernet protocol
In 10GBASE-R specification, Gearbox is defined to take care the data width adaptation between PCS & PMA. For example, after the 64b66b encoding, the PCS data width will become 66bits.
The gearbox ...
0
votes
1answer
45 views
Passing <5V through bus of tri-state transceiver
I am following a schematic which implements a basic 8-bit register. The schematic is pictured below:
According to the datasheet of the 74LS173 chip, The high-level output voltage is 2.4V with testing ...
0
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0answers
55 views
Looking for advice - DIY data transmission over DC power lines
Want to drive DC motor and read some data through one pair of wires. Modified and made a simulation of transciever based on this one: https://www.radiolocman.com/shem/schematics.html?di=148255.
...
1
vote
1answer
143 views
74LS245 octal bus transceiver doesn't transmit bus
I'm doing a bit of testing with the SN74LS245 IC which is an octal bus transceiver. According to what I understand in the datasheet and the given truth table, pulling the DIR (pin ...
1
vote
2answers
93 views
Termination between driver and transceiver
I have the following line driver and line transceiver
driver: 74VHC244
transceiver: 74VHC245
They're connected via a 0.5m long ribbon cable with an impedance of 100Ohm.
The digital signals have a ...
0
votes
1answer
75 views
Will SN74HC245N transceiver support TTL RX when blocked?
I'm actually designing a system with:
~10 "Master" boards that transmit data from slaves boards to a RS485 network
4 "Slave" boards per master one, connected trough a 3 pin jack (5V, GND and half-...
1
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0answers
20 views
USB transceiver or Boot loader [duplicate]
I am doing one hobby project, using STM32F103R8T6 Micro controller for my project, now I am using JTAG pins to program the controller. I will keep on modifying the firmware for my project, in this ...
1
vote
1answer
53 views
USB transceiver helps me to update firmware program to microcontroller via USB interface?
I am doing one hobby project, using STM32F103R8T6 Micro controller for my project, I would like to use USB transceiver for this micro controller, does this helps me to update my firmware program ...
2
votes
2answers
114 views
Isolated CAN transceivers as a CAN bus extender
I am designing a system to 'hack' into a CAN bus. My first idea was to split the target CAN bus, terminating both ends into isolated CAN transceivers, and use a MCU to pass packets between the buses ...
7
votes
2answers
2k views
How can I fix a dry solder pin in a BGA package?
I am facing problem in a 16-bit transceiver chip, 74LVCHR16245AZQLR, which is a 56-pin BGA package.
Its one data pin is not working as expected while all other pins are working OK. The problem pin is ...
0
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1answer
75 views
CAN transceiver Vref connection
I am using the TI SN65HVD230DR CAN transceiver on two separate CAN buses between three microcontrollers (MCUs) -- two are on the same board, and one is off-board. This transceiver includes a Vref pin:...
1
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2answers
85 views
What is the purpose of R1, R2 in this ESD protection circuit
What is the purpose of R1 and R2 in this circuit? Is it required? I have seen in documents like https://www.onsemi.com/pub/Collateral/AND8169-D.PDF where no resistors are shown in the example ...
0
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3answers
20 views
On SN65HVD1780 are external pullup and pulldowns
On transceiver SN65HVD1780 are external pullup and pulldowns required on A,B,DE,RE,D,R lines? The datasheet mentions that the part has internal pullups and pulldowns but it's not clear if external ...
0
votes
1answer
48 views
Multiplexing a 16 button keypad to an 8 button remote control module
I am wanting to multiplex a 16 button keypad to an 8 button RC transceiver so that I can have remote control over 16 functions instead of the standard 8.
The transceiver I am using is the 900MHz ...
1
vote
1answer
59 views
Should I take precautions when using different CAN transceivers on the same bus?
What are the precautions I should be aware of when using different transceivers on a CAN bus?
What I can think of:
They neeed to operate at the same voltage (on ...
1
vote
2answers
239 views
Rs485 to UART convension
I need to send data from one PIC to another PIC by using RS485. As a protocol I use UART. However, I cannot be sure about RS485 transceiver and its circuit. I will be able to supply 5 V and according ...
0
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0answers
24 views
Transceiver IC SN74LV245A at different voltage levels pull up resistor require for current improvement
I've gone through datasheet of IC Page number 12 Figure 5 shows typical application of IC which is 5 to 3.3V compatibility.
In my design My sensor Output is 1.5V to 2.2V so we're planning to have ...
0
votes
2answers
66 views
Integrating IC transceivers on a pcb
I have a question about the difference between transceiver modules and transceiver ICs.
I want to integrate a 2.4GHz transceiver IC - nRF24L01+ onto a PCB instead of using the NRF 24l01+ module.
...
0
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1answer
38 views
SN65HVD3x (RS485 Driver) - Termination resistor
I want to use the SN65HVD31DR to connect two microcontrollers together. The connecting cable has an impedance of Z0 = 80Ω. According to the data sheet it is recommended to terminate the connection ...
2
votes
1answer
203 views
Sub 1 GHz communication - long range at 500kbps. Is my range estimate roughly correct?
When researching long range medium bitrate RF comms I came across the TI range. The TI CC1201 transceiver claims -97dBm sensitivity at 500-1000kbps. If the system is on the 868MHz band which is ...
0
votes
2answers
79 views
MAX232 vs TRS202EC Line Drivers
I have used MAX232 as UART serial line driver using 5V power supply. Now I have come across TRS202 chip in a circuit. It also run with 5V power supply. Does this chip has some special difference or is ...
0
votes
3answers
285 views
How to decrease nrf24l01 transceiver range?
I've just got my Nrf24l01 but then I found out that the working signal range for the module is 100m and above. Our real intention for the module is to let the nrf24l01(Receiver) out of range for about ...
1
vote
1answer
59 views
Using a Bluetooth receiver with 3.5mm jack headset [closed]
For the past 1/2 year I have been using a cordless Bluetooth headset (this one) connected with my motorcycle Garmin GPS device. While connected the device will not allow me to control the volume over ...
0
votes
1answer
75 views
Can I make my cellphone a 3.5mm jack bluetooth transceiver? [closed]
I want to hear sound from my TV using my Beats Solo3 wireless headphones the problem is that the TV doesn't have a bluetooth transmitter (or any wireless connectivity) it has USB and 3.5mm headphone ...
1
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1answer
132 views
To Fail-Safe or not Fail-Safe on RS485/422 Transceiver
I'm stuck on a PCB design issue.
I'm designing a new PCB (Daughter board) that will plug (via DB15-F to DB15-M) onto another PCB (existing Mother board) and the design intent is to take (from the ...
-1
votes
2answers
89 views
Half-duplex wireless: Is a tuned antenna more important for the transmitter or the receiver?
I intend for this to be a general/conceptual question that could apply to any wireless communication hardware, however I will use a specific example to talk about.
Let's consider the nRF24L01. (...
0
votes
1answer
106 views
DMX receiver 40V signal
I am creating a DMX receiver circuit. The dmx that is received from a controller (USB DMX dongle) is converted via a transceiver (SN75176BP) to a signal which can be understood by an ATMEGA328P.
I ...
0
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0answers
52 views
Equalisation and Pre-emphasis for high speed transceivers
How can we see the effect of equalisation and pre-emphasis in simulation?
Like equalisation is used to overcome the losses which may be because of :
Signal Attenuation
Reflections
Intra-pair ...
0
votes
1answer
71 views
How to model a physical channel using verilog?
I don't have access to high speed transceivers FPGA. So i wish to model the channel of high speed transceivers which is not error free so that i can test my codes if they are working fine or not.
Is ...
0
votes
1answer
114 views
LIN Network without Transceiver (for testing)
My task is to implement LIN network on SPC560P microcontroller. This microcontroller does not have builtin LIN-transceiver, so it provides TX and RX pins. I know Lin network only has one LIN wire, but ...
0
votes
2answers
25 views
difference between max3387ecug+ and max3387ecug+t
can I know what the difference is between MAX3387ECUG+ and MAX3387ECUG+T, the MAXIM datasheet doesn't seem to point the difference.
2
votes
5answers
923 views
Wirelessly connect several DS18B20 across a house
I am planning on reading temperature data form across my home using several DS18B20s and sending all of the data to a raspberry pi. I have already managed to interpret data from one sensor directly ...
3
votes
0answers
183 views
nRF24L01+ module channel sensitivity and directivity
I want to start a project where I distribute many nRF24L01+ modules across the house. I am pretty sure someone has done that before. But before I wanted to begin I evaluated the modules using two ...
3
votes
1answer
1k views
Simple CAN bus design, communication issues
I am trying to get some simple communication between two boards that I've designed with an ATmega328P microcontroller and MCP2515/MCP2551 combination.
The design is as follows:
I have both ends ...
-1
votes
1answer
34 views
wirelessHD using with FPGA
I going to make a system to transfer data between 2 FPGAs wirelessly with high rate.
I found that wirelessHD method can do this, now what is the required hardware to establish such system?
0
votes
1answer
87 views
How can remove the spikes in common mode rail?
Following is the circuit I am working with.
Intended output across R7 is (60 Ohm resistor) is:
More than 2 mA current for logic high (5 V) input V1
Less than 0.1 mA for logic low (0 V) input V1
...
0
votes
1answer
191 views
Fastest working Wireless communication method between two devices
I attempted to ask this question on the network engineering forum but the mods there think superuser.com is a better place for it, but when I posted there, they think here is the best place for this ...
1
vote
2answers
280 views
A Single Antenna for Multiple Sub-GHz Receivers
I am thinking about making an inexpensive LoRa geteway by combining eight single-channel RFM95W 915 MHz transceivers. These would just work as receivers, and I would have a 9th one working separately ...
