Questions tagged [interface]

An interface defines clear boundaries and communication/interconnection between systems.

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Connection STM Nucleo expansion module to STM 32 NUCLEO

I want to connect a STM I-NUCLEO-LRWAN1 Expansion module to a STM32 Nucleo microcontroller. However, there are no documentation on how this is achieved: http://www.st.com/content/st_com/en/products/...
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1answer
53 views

How to implement 5V NPN component to a 3.3V MCU input pin

I just want to make sure about how to implement this to an MCU's input pin, if the MCU is limited to 8mA sinking/source current. And 3.3V input voltage.
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1answer
410 views

transmitting 3.3v/5v signal over a 2 meters cable

Sorry to send homologous question. I have looked through this site, but for my limitation on electric knowledge, I have to ask still. I'm trying to build a DIY project based on arduino and other ...
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3answers
1k views

Using transistors to replace push buttons

I'm looking for a little help designing a transistor circuit. I have a small LCD (I took from an after-market car backup cam system), and I’m trying to control its built-in menu using the buttons of ...
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71 views

SDI 12 interface

I have a sensor that use SDI-12 communication. I want to connect it to a a µC. I'm looking for something like RS232 <-> SDI-12. Or USB <-> SDI-12 the only schematics I've found use buffer. Do ...
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1answer
247 views

What kind of communication protocol is this?

I'm trying to reverse engineer the communication between two modules, a master and a slave, but I couldn't figure out the used protocol. All of the signs use 5V. The blue sign's frequency is 400 kHz. ...
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1answer
154 views

Requirements for Integrating Thunderbolt 3 Into Product

Based on the bandwidth and relatively good availability of Thunderbolt 3 ports on PCs we are considering incorporating a Thunderbolt 3 interface into a new product. My understanding is that the ...
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2answers
121 views

Board to Board connection for RF and high-speed digital signals

(I hope this is not regarded a "shopping or buying recommendation" question - in my opinion it is not). In order to split a larger project into more tractable and flexible sub-blocks I create two ...
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3answers
141 views

Is there any reason that any speaker connected to any computer couldn't be used for listening/surveillance?

I understand that it's possible to use the headphone port of a laptop as a microphone, but what are the physical limitations to using any speaker in the same way? I'm curious about what makes ...
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1answer
56 views

RF Power Supplies - Matching Impedance

I'll soon be working with RF Power Supplies used to provide power to plasma generators and other systems. A 50 ohm resistive load is used. If I'm correct, in most cases matching impedance between RF ...
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1answer
212 views

Simplest and quickest rig to hack an LED Voltmeter for USB interface

I have a few LED Voltmeters that's almost identical to this: I need to log fairly DC voltages for long spans. Sampling every few second or fractions of seconds or so. I know decoding the exact digits ...
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1answer
87 views

An emitter follower to isolate MCU from load?

I am trying to drive an LED strip (10 LEDs) from the output of an ESP8266 GPIO pin. I measured the short circuit current from the GPIO and got around 40 mA. My question: Is it recommended to include ...
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268 views

fire detection system with lm358 using arduino and labview.I want help regarding if my circuit is correct or not?VI

I'm a beginner working on this system (Link). I build the hardware similiar to the link and I did a software implementation on Lab view as well, but only the buzzer starts when temperature is ...
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52 views

Controlling a circuit board from my PC

I am planning for a project I want to make that involves a custom pcb. The board is fairly simple. It has a 4 bit input. But I need to do advanced calculations from my computer to determine what the ...
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0answers
101 views

What is this early LCD/PDP interface?

This is the pinout for the internal screen connector of a 1986 Toshiba T3100SX 'laptop'. The screen itself is a orange neon gas plasma display (although they also made some with an LCD). Does anyone ...
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1answer
392 views

Interfacing ADS1115 with FPGA

I'm trying to interface ADS1115 to MAX10 FPGA. I've managed to start reading from the ADS1115... but I'm facing another problem as of now... even when i connect A0 to 3.3v I'm reading junk i.e ...
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74 views

How to connect multiple Raspberry Pi to an Arduino

If you want to make multiple Raspberry Pis to communicate with an Arduino, what interface can you use? I have a sensor connected to an Arduino via I2C. Now I want to share the readings from the ...
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2answers
2k views

Data transfer from Microcontroller to computer [closed]

I'm looking for a good link to data from Microcontroller to computer. I do not know what kind of communications is suitable for me. I need a link which has a bit rate more than 50 Mbit/sec. and also ...
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1answer
106 views

How can I Access Tiger Sharc DSP processor through host pc?

I am working on designing of a test board which involves both FPGA(Xilinx- Kintex 7) and DSP(Tiger Sharc) based signal processing. Now the end user wants to access the DSP processor programming ...
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1answer
303 views

MCP25625 LoopBack Mode Reponse

If anyone has worked with the CAN MCP25625 chip in the past I would like to know if in the loop back mode if we load and send data on the TXB0 buffer are we supposed to receive a RXB0 buffer ready and ...
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2answers
184 views

Driving an input with a 12V 4k7 pullup from 3V3 logic

I have a board with 12V CMOS logic whose inputs are pulled up via a resistor. It was designed to interface from a board via open collector opto-coupler. Now I have a request to drive it from 3V3 logic....
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2answers
100 views

What is an on-chip interface and Why is it beneficial to have an on-chip I2C interface than polling [closed]

In the I2C Specification manual it's given "When the device does not have such an interface, it must constantly monitor the bus via software" I am sorry but I don't understand what is meant by ...
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1answer
93 views

Interfacing two ICs with different thresholds

I'm trying to using an ADuM1251 (http://www.analog.com/media/en/technical-documentation/data-sheets/ADUM1250_1251.pdf) with an ATxmega32A4U (http://www.atmel.com/images/Atmel-8387-8-and16-bit-AVR-...
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1answer
325 views

Save data on sim card using micro-controller

SIM cards come in various data capacities, from 8 KB to at least 256 KB. All allow a maximum of 250 contacts to be stored on the SIM, Is it possible to save data (other then contacts) in sim card, ...
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174 views

Interfacing retriggerable oneshot with optocoupler

I'm trying to interface 74HC123 monostable with 6N137 optocoupler. Signal from optocoupler will turn on MOSFET driver. Monostable outputs correct signal when optocoupler is not connected - 200 ns ...
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2answers
305 views

Using HDD as an input device for Arduino

I'm wondering if is it possible to use an old HDD as an input device that would feed some kind of data to Arduino. If you manually positioned the head and platter (the disk is not spinning, so it ...
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5answers
1k views

Interfacing large number of UARTs to PC

I would like to find a good way to interface many UART devices (sensors) to a single PC for data collection and processing. For my use, there may be as many as 100 UART devices each operating at ...
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6answers
1k views

MCU - Minimum list of external components

I can't find a complete answer for this anywhere, and I want to fill the gap in my knowledge of MCUs. In MCUs why do I need any other component except, maybe, a voltage regulator and an external ...
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2answers
1k views

Which are the input/output requirements of a 12V trigger interface?

For a personal project, I'm building a simple I/O control board for an audio module. This board has an MCU that implements all the I/O control logic, and some interfacing electronics as well. It will ...
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1answer
56 views

Error with Serial Communication between Processing and Arduino

I have a sensor which can give information about X and Y position movement, and I want to create a simple interface in which a circle on the screen will move in the same direction as I move the sensor....
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2answers
486 views

Standard Interface Between LCD and GPU

Almost all smartphones on the market seem to use a distinct LCD as their display, though most use an ARM processor with a GPU from one of a relatively (compared to the screens) small number of ...
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966 views

Arduino - Writing to a 3½ floppy disk

I found some old, still working 3½ floppy drives using the 34-pin IDC interface, that will take a 1.44 MB disk. I had a project in mind, using these floppy disk as an "access key" for a door. In order ...
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1answer
606 views

Spartan 3E FPGA IO & Clock Questions

I have a Xilinx/Digilent Spartan 3E starter board, UG230. I'm designing a PCB for an ADC/DAC board. I'm quite new to FPGAs (with some experience), but I don't want to make any silly mistakes using the ...
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1k views

Interfacing 5V to 3.3V for Xilinx Spartan 6 FPGA and vice versa

I am referring to high speed design with Spartan 6 FPGA. My query is, in design I am having 5V compliant devices (ADC,FIFO memory) and want to interface with 3.3V FPGA spartan 6. If I opt for simple ...
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1answer
1k views

How to control thermal printer from micro-controller and choose it

The project is to print barcode and some text with thermal printer using micro-controller. Initially I chose RP58 which has this command set and serial port. So to control the printer, do I just ...
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1answer
256 views

Is it possible to connect USB printer to Atmega8 [closed]

I have a usb thermal printer, that I want to control using Hex commands in its datasheet from cheap micro-controllers. But to do that I need to create USB host in my board and it requires more than ...
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1answer
107 views

Interfacing a SAR ADC (LTC2323-14)

I want to interface an ASIC with a SAR ADC, e.g. LTC2323-14 (5MHz, 14 bit). The timing diagram looks as follows: I would like to generate the control signals (i.e. CNV and SCK) with my ASIC, based ...
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2answers
304 views

SN75176B RS-485 Transceiver - Low Level Driver Oscillations

I'm trying to interface an Arduino Mega2560 to a Modbus RTU device using an SN75176B transceiver, on a solderless breadboard at this stage. When I'm driving DE high and writing serial data out of the ...
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2answers
2k views

How SPI and I2C latch data?

I got questions about the working mechanism and measurement method of SPI and I2C interface. For SPI, there are several modes. My question is, how will the data be latched? Take CPOL=1 and CPHA=0 for ...
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1answer
122 views

Is it safe to leave floating the low voltage supply of a logic level shifter?

I need to interface two devices, one runs at 5V and the other at 3.3V. In order to safely interface them, I'm using a simple logic level shifter (LLS) of this kind: It's a pretty straightforward ...
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2answers
292 views

FIFO Memory Volatile or Non Volatile

I am referring to IDT7203 datasheet. ( MEMORY FIFO 2048X9 25NS ) Link here: http://www.digikey.com/product-detail/en/idt-integrated-device-technology-inc/7203L25J/800-2478-5-ND/2014356 My question ...
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200 views

USB COMMAND INTERRUPT, DMA, I/O PORTS IN WINDOWS 7-EXAMPLES [closed]

In the present, there is virtually no other interfaces between external electrical circuits and the internal resources of computers, than USB (excluding PCI, PCIE...cards, useless in the case of ...
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1answer
2k views

What is the best interface circuitry for using FSR sensors?

Force Sensitive Resistor (FSR) is a sensor which lowers its resistance when there is force upon it. If there is no force acting on it, the resistance is ~10MOhms. Looking at Interlink's guide (...
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2answers
1k views

What are the methods to connect ac servo drive to the computer and control it in realtime?

I want to control three AC servo motors with a computer or a microcontroller. I am confused about what kind of communication protocol should I be choosing for the servo drive. The input to the servo ...
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2answers
61 views

How can I get a raw image from a consumer camera? [closed]

I have an SLT camera (Sony A7R2) and while it has a raw output interface for video (via microHDMI out), it doesn't seem to have any way of outputting RAW apart from writing it onto the SD card. My ...
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1answer
88 views

Can I connect TV Speakers to an interface and use them as stand alone? [closed]

A couple of months ago I broke my TV and the only thing I could kept were the internal TV speakers The TV was an LG 55EA9800. Now, my laptop has been giving me issues with the sound, I think the ...
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1answer
2k views

Preferred way of interfacing relay coil with active low output from MCU

My prototype would use active low output from 8-10 ESP8266-12E GPIO pins to control AC appliances. I have several options to interface the relay (or SCR phase control circuit) with the MCU. But I can'...
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1answer
4k views

Where should I place the series termination resistor for AVSBus?

I'm dealing with a AVSBus interface (like SPI, there are CLK/MOSI/MISO signals). The CLK may run up to 25MHz, so we'd like to add series resistors on the board, as a back up if we need to tune the SI ...
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1answer
134 views

Applying USB to UART and RS-485 to UART to the single MCU UART port

So basically I'd like to put two external interfaces into one device. One of them will be RS-485 (I'd use SN75176 for that) and the second one is USB (with FT232BM). I will use ATmega48PA-AU CPU as ...
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1answer
243 views

How do scanned interface inputs work?

I'm learning about different ways to interface physical switches to microcontrollers and I don't understand how scanning interfaces work. I am told in the notes that the software from the ...

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