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Questions tagged [pins]

May refer to conductive traces of an integrated circuit, exposed as metal contacts, or pins, which are large by comparison and make physical connection to other components feasible. May also refer to metal pins connected to specific traces of a printed circuit board for the purpose of connecting and disconnecting external components or peripherals in a reusable way.

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30 views

Altium pin parameters in symbols

thanks for the many great questions and answers over the years. This is my first question. I use Altium Designer for capturing designs. I had an idea to make my processor components a little more ...
2
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1answer
74 views

Need to identify this pin receptacle and plug

I need to identify this pin and this plug so I can order more. RESEARCH: I've pored over Molex.com, Allied Electronics, and here with no success. Please understand, I'm fairly new to electrical ...
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0answers
22 views

Part number pin for socket programming

I'm developing a board using the Omega2 and I need a socket for the software uploading. I found this great video: https://youtu.be/aoYadArVJPw I need these pins at 0:25 sec ; does anyone knows the ...
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2answers
62 views

Query: why a 4-pin DIN plug on a 5 VDC 10 A supply?

My new 5 VDC 50 W PSU has a 4-pin DIN output plug. The output diagram on the PSU lists two pins as (-), and two as (+). The voltage between any +/- pair is identical (5.13 V), so why the need for two ...
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1answer
62 views

ATmega328p PIN reading

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1answer
152 views

Arduino - Using NPN transistor as a switch to pull-up/down analog pin

Let me start by saying that I am not an EE, and my knowledge in Electronics is basic, so please bear with me and be patient if, initially I am bending a few rules. In Epee fencing, a touch is awarded ...
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1answer
62 views

How do you connect a device pin AIo when there is only AI0+ and AI0-

I am new to electronics and I faced this problem. I tried to search about it but got lost. Here is the sensor and the DAQ device https://docs-emea.rs-online.com/webdocs/13ec/0900766b813ecfc2.pdf ...
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1answer
47 views

What to do with internally unused pins on a non-programmable device?

I'm designing a board for using the FLIR Lepton 2.0 LWIF camera (datasheet at https://www.flir.com/globalassets/imported-assets/document/lepton-engineering-datasheet---without-radiometry.pdf), and ...
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1answer
41 views

Pager system charging pin and socket

Does anyone know what these pins are called? This is a pager from paging system used in certain restaurants. I'd like to know what it's called as I want to use it in my device's design. I need to know ...
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2answers
72 views

Can I test if a battery is connected to a circuit?

I have a 12 V rechargeable lead acid backup battery that is connected to a circuit. When the battery is not in use there is a constant 12 V applied for charging, and when the battery is in use there ...
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1answer
57 views

Soldering double deck pin headers

Please take a look at a PCB like this one (STM32 Nucleo64 board): They utilized so called "double deck" or "stacked" headers, meaning they can be used from both sized (top and bottom). My question ...
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2answers
39 views

Can problems arise from mixing 2.5mm pin pitch components with 2.54mm through-hole protoboards?

I am new to electronics and from what I understand, most protoboards seem to be standardized on a 2.54mm (0.1") pin pitch. I am also aware that there are through-hole components which are manufactured ...
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2answers
92 views

Resistor or no resistor between this IC and the pmos GATE?

I'm using this IC (https://www2.mouser.com/datasheet/2/609/ADM1270-878589.pdf). This IC controls the GATE of a pmos. I'm thinking about using this MOSFET (https://www2.mouser.com/datasheet/2/389/...
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0answers
193 views

Using ICL8038 as a VCO

I wanted to use this function generator IC as a voltage controlled frequency output especially to obtain low frequency sine waves. But unlike many implementations, I wanted to control the frequency ...
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1answer
106 views

Are all the pins from a USB3.0 micro-B connector necessary

I'm designing a system that has a camera (Ximea: MQ042RG-CM) that uses a female USB3.0 micro-B connector. I could connect to my computer through a male end, but I want to minimize the number of ...
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3answers
305 views

Not enough pins, looking for a “demultiplexer” that keeps state [closed]

I want to control a simple display with a microcontroller. The display has 8 input pins, the microcontroller only 6. Is there an IC that I can interpose that lets me set the state of each of its ...
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0answers
94 views

High-level (Ioh) and low-level (Iol) output current measurement on I/O pins

I'm looking for a procedure to measure the High-Level output current (Ioh) and Low-Level output current (Iol) in a I/O pin for a IC. I'm planning to use a variable resistor tied to VDD or VSS. Maybe ...
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1answer
117 views

Giant pogo pin or spring probe pin for registration during electrical test

Solved: if you search for "GP-2 PCB Board Umbrella Shape 5.3mm Tip Testing Probe Pins Receptacles" you will find these probes! Thanks for the help! I am designing an electrical test fixture, and I ...
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1answer
104 views

LSM9DS1 accelerometer with too many aux pins. Which ones are actually useful?

I'm designign a board with an LSM9DS1. I have an SPI bus (with only this device connected), two gpio for the chip selects (it has two CS, one for gyro and accel and the other for the magnetometer. ...
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2answers
72 views

Can Micro-controller bear the voltage at its pins more than its rated voltage?

I have a micro-controller, for which i have a datasheet specifying the ac/dc characteristics of that mcu. But in this datasheet there are no absolute maximum ratings only the operating conditions are ...
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1answer
27 views

Need advice with pin connection of an LCD module

Hello. I am working on this LCD module, COG-C144MVGI-08. Like in the image I uploaded, PIN 1, 4 and 12 are ground. (Just in case you need the full datasheet : https://www.avrfreaks.net/sites/...
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1answer
83 views

esp32 adafruit huzza32 touch button

I'm having a problem mapping touch pins(for touch buttons) on adafruit hazzah, because pins on the chip(for touch sensors) and board doesn't match. Does anybody knows how to connect them(to which pins)...
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2answers
44 views

Errors in pin assignment for a SPICE file in Altium

I'm trying to simulate the following circuit in Altium before going to PCB route: But I get the following pin errors: I found the SPICE model and tried to assign them to this footprint: Here is ...
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1answer
21 views

Calculating required delay before pin value is recognized in 8051

I looked at the following in hopes my question will be answered: can we use 8051 pin as Input and output at a time? But the answer was vague. It stated: "though there is a 'strong' source ...
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1answer
69 views

Nexus 6P FPC connector

What is the importance of this metal edge of my Nexus 6P fpc connector? I broke one of the two, would anything be affected? Is there a name for this piece?
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1answer
107 views

Is a voltage level shifter necessary?

I am using an STM32F100xx MCU and I want to communicate via UART with a GPS module, specifically the A7 Thinker GPS GPS Module with A7 Thinker from Aliexpress This module, when a 9V battery is used, ...
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1answer
97 views

Are pins of my Arduino fine? [closed]

I was making an Arduino project. It was a very safe project as I copied it from Arduino's official website. The project was about adjusting the speed of blinking the LED on 13 pin of the Arduino. I ...
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1answer
41 views

How do the pins of this analogue switch correspond in this diagram?

Regarding an answer of my previous question, I want to use the following topology: When the input is below the threshold, the comparator output is HIGH and the Analogue switch above outputs the set ...
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1answer
122 views

Changing GPIO pin configuration on the fly

I am using STM32F0 based ARM Cortex-M0 micro controller in my project. Because of lack of available pins, I need to use one pin as an ADC-input and as a GPIO-digital-out (not at the same time, but in ...
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1answer
113 views

BA3121 datasheet pin confusion

The BA3121 is an audio (ground loop) isolation amplifier. In the datasheet there is no simple pinout picture with names of the pins, so I draw this pinout picture by following the block and the ...
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0answers
35 views

BJT / MOSFET Symbol Pin Function

When creating a new Transistor schematic symbol (FET or BJT) what is the correct pin type / function for each of the pins? Do most people leave them as passive? Or would you use high-z for gate / base,...
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3answers
837 views

Connecting to an IR sensor to a microcontroller module without soldering pins

I'm trying to connect an IR sensor to an Adafruit Feather Huzzah microcontroller module without soldering the pins on. The sensor has a power supply of 5V which I have connected to the USB pin of the ...
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1answer
56 views

Help identifying/using some weird pin headers

EE student who's a little new to the hardware side of electronics here. I could use some advice on how to use these things- I assumed they were pin headers, but I might be wrong about that. They ...
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1answer
247 views

What's the name of this nice spring contact?

Ah, it is really a beauty isn't it (see picture below)? Around the package you see some spring contacts, really, really nice. I have some ESP8266MOD modules and like to use these spring contacts ...
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1answer
107 views

Arduino Nano pins are always high

i started to build an infrared transmitter (commander). I use 4 pushbuttons for left, right, up, down. These buttons are pulling down when pressed. I used internal pullup resistors. My prboblem is ...
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1answer
80 views

Is this an accurate model of a microcontroller pin?

For something so common, I can't seem to find anything online on what a microcontroller pin "looks like" (besides a high-level voltage source when output, open-circuit when input). So I decided to ...
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3answers
262 views

DAC behaviour on reset / startup LPC1768

I am programming a mbed LPC1768 for a constant current discharger. I plan to use the DAC output on the LPC1768 for setting the current in my discharge circuit. edit: The trouble i am having is ...
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69 views

FMC connector in AC701 and clock management

I will be using the AC701 FPGA board. https://www.xilinx.com/support/documentation/boards_and_kits/ac701/ug952-ac701-a7-eval-bd.pdf I need to use the pins of the FMC connector to connect the outputs ...
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1answer
85 views

Is there a device which replaces soldered pin headers?

I have to flash several devices and up to now I was soldering pin headers to attach the device to my PC. I will soon have 20 or so to flash and would like to avoid messing up with the soldering part (...
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1answer
250 views

ADC: should I pull up the unused pins?

I am reading the datasheet for an ADC. There is no reference as to what to do with unused pins. I am willing to put some pull-up resistors but.. What would you do?
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3answers
577 views

Implementing a good connection for pogo pins in eagle

I'm currently working on my very first SMT PCB, and would like to connect a number of PCBs to the main PCB using spring loaded pogo pins like these: http://uk.farnell.com/harwin/p19-2221/probe-convex-...
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1answer
147 views

What does Pin type I mean on the ESP32 datasheet

On page 3 of the esp32-wroom datasheet (PDF) it shows a series of pins with type "I". What does pin type I mean? Are these different to the pin type I/O pins? If so, how?
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2answers
137 views

Not enough pins on my micro controller? [duplicate]

this is my first electronics project that i am doing so my understanding is pretty basic. I am using an ESP8266 connected to a L293D motor driver to power a bipolar stepper motor. The issue I am ...
2
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1answer
392 views

FPGA - Is it possible to change the pin direction/type during runtime?

On an FPGA, is it possible to mimic the behaviour of something like an Arduino, whereby the code running on the chip is able to designate a pin as an input or output? Let's say the FPGA is configured ...
3
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1answer
307 views

What kind of wire-to-board connector is this?

It has a pitch of approximately 3.9 mm. Pins are 1.1 mm square. On the board there are 2 and 3 pin versions of this connector. Here are a few pictures:
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Diodes for mixer design

For a diode ring mixer, how should I choose the types of diodes? I've seen Schottky diodes as the primary choice. but why not PIN diodes? What diode aspects should I consider when designing a mixer? ...
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1answer
2k views

How much current can a 0.1" pitch pin header pass?

I'm curious how much current it is safe to pass through a 0.1" pitch pin header. I'm sure it will depend on the gauge and stranding of the wire attached to it as well, but assuming that is not the ...
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2answers
81 views

Figuring Out Pin-Header Size for Socket from Datasheet + Ordering Specific Pin-Header Size

I ordered a 24 pin component socket for an Arduino Pro Micro. The specific one can be found here: https://www.mouser.com/ProductDetail/575-11044624?r=575-11044624 However, when I received my ...
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73 views

Mini Display 1.8 inch SPI TFT interface to AT89C51 microcontoller

How should I connect the 8 pins on the 1.8 inch TFT display with an AT89C51 microcontroller. This is the kind of display I have :
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1answer
67 views

How to work out the interface of an LCD?

If I got an LCD, and I didn't know anything about it, and there were no markings on the pins, how would I go about interfacing with it? For example, I got this small (around 2.5") colour display out ...