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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What does INH as an IC pin label mean?

While using a CAD model for a 74HC4051D multiplexer which I downloaded from SnapEDA I noticed that pin 6 is labelled INH rather than E bar (or Enable) as I anticipated from the datasheet. What does ...
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Is there some mini-plugs for this connector?

I have this connector pictured below. For now I've been soldering my wires directly into these pins. But for some occasions it would be nice to have removable wires. Does some sort of mini pin ...
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Best way to connect Raspberry Pi Pico to apartment monitor?

I'm trying to power my Raspberry Pi Pico using the existing power connection for my apartment monitor (link to manual) I note on the back of the monitor, there are unused pins, specifically a 12v and ...
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Find free pins on board (Vivado)

I work in Vivado and with MiniZed board. I need to find two free pins I can use and add them in io.xdc file (constraints). How and where can I find a list of free pins?
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What component is like a jumper, but doesn’t actually conduct?

I suppose you all know jumpers, those little things you put on top of 2 male, 2.54 mm pitch, pins. They serve to connect the 2 pins together (often used to "configure" a prototyping board), ...
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What is the name of this 5-pin connector?

What kind of connector is in the images?
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Detecting pulses of one nanosecond length

As the title suggests, I want to detect extremely weak (~20mV) and short pulses: between 900ps and 1,5ns in length. I do not really care about the readout time or hold time after a pulse is detected. ...
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1 vote
8 answers
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LED wired to GPIO in an unconventional way

I was looking at a schematic for an existing board, and I was surprised to see that this LED was wired up to a GPIO pin (LED1 label), but as if the current was gonna go to ground "inside" ...
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PIC16F886 and Switch Setup with Diode

I would like to make a simple embedded program that will Display what is happening on and LCD screen. When Switch One is pressed, it displays "Switch One". When Switch 2 is pressed it ...
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1 vote
2 answers
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SD card socket just need to wire with pull-up resistors?

I have a question about Micro SD card and STM32F446RE wiring issues. I saw this schematic from ST forum. I would like to ask, when I wiring STM32F446RE with SD card socket (I mean connection part), ...
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1 answer
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2mm pitch 10pin header (2x5) to 2.5mm pitch socket connector header adapter

My PCB has a 2.0mm pitch 10pin JTAG header (2x5). My MIPS programmer has a common 14-pin(2x7) 2.5mm pitch socket connector header at the end (flat IDC cable with female header). How do I interface ...
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How important is a PCIE_PEG_TXN pin on a motherboard?

I managed to break the PCIE_PEG_TXN 2 pin on my motherboard according to this pin layout: https://sector.biz.ua/docs/lga-775-1150-1151-1156-1155-1366-2011-pinouts/s1200_1.png I am curious if it is ...
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Do you need a current limiting resistor on an enable pin?

I am using MCP16312-E/MS buck regulator and need the component to always be on. I am therefore connecting the enable pin to the Vin supply. Do you need a current limiting resistor? Whilst the resistor ...
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Why can't my MOSFETs fit in my breadboard?

This is probably another question with obvious answers, but Googling didn't help. I bought an N-channel power MOSFET from Adafruit recently. I also bought a breadboard, also from Adafruit. However, ...
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Pin Swapping Not Available?

I am a bit of an Altium novice. Designing a board and trying to use the "Route Guide" in PCB ActiveRoute. However, when I try to lay out a guide with selected pads and hit ActiveRoute, ...
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What GPIOs in NodeMCU are usable

I am running out of usable GPIOs in my NodeMCU esp8266 board. I'm making a car. For the car I use L298N motor driver with 4 gear motors. The pins of L298N motor driver is connected as like this, 1.ENA ...
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8051 AT89C51 PSEN ALE pins, not to be used

I am new to microcontroller programming, and am about to lay hands on the 8051 AT89C51. I want to do some basic things like flashing LEDs, microcontroller to microcontroller data exchange etc. I have ...
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What happens if certain pins missing on USB 3.0 interface? [closed]

I have a "SanDisk Ultra Dual 32GB USB 3.0 OTG Pen Drive" and I noticed there is a broken pin in the USB A interface. After I disassembled it turned out I missing the 2. pin on the 5 pin side ...
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What manufacturer is this contact?

I have a relay contact, that I am trying to identify. It is from an Audi, who mostly use TE/Tyco, but this is different. It has this marking on it: Which I have tried to replicate here for clarity: ...
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LCD does not have Register Select or Read/Write pins. Instead has FLM, LP, CP, and M pins

I have a old Optrex DMF6127N LCD display. I can not find any datasheets for it online (I believe it was made specially for AT&T's Bell Labs) and am trying to get it to work. I have looked at ...
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ENABLE and T/R pins on MAX7032 Tranciever

Last month I started working with electronics a bit. With no previous knowledge and I'm getting into PCB design for many different applications. That being said please correct me if I misinterpret or ...
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1 answer
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How to reattach LCD to pcb that has power but no data?

Where do the lcd data connectors actually attach? I have been researching to attach lcd to pcb but every example I find has notiable pins from thw lcd. I can see the pins on the board but how do they ...
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Can you electroplate edge connectors/pins/pads/fingers with the chips still on the board?

I recently bought a NES game with corroded pins and I'm not able to return it. I've tried the non-destructive stuff like isopropyl swabs and hi-poly erasers, I've tried less destructive stuff like ...
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synchronous rectifier controller having high voltage drain-source sense pin

I am looking for an IC that is suitable for synchronous rectifier operation and having high drain voltage sense pin. Most of the ICs (NCP4306, IR1168, UCC24612) are having drain sense pin up to 200-...
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1 vote
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Protection of the pins of an electronic board against overvoltage due to a bad connection

I designed an electronic board with two inputs connected to an ADC (MCP3202), one output connected to the output of an AOP (INA105) and a 24V battery supply. My question is: is there a way to protect ...
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Pin Swap for an FMC Connector

What determines if you can swap pins on an FMC or not? I can technically swap the pins on a PCB footprint but the datasheets don't show the pin arrangement I'm about to make to make the trace routes ...
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Arducam ESP32S Uno Pinout

I am trying to attempt to hook up an Adafruit Lora RFM9X to an Arducam ESP32-S Uno board. However, I am receiving the following error: Failed to put device in Lora Mode RH_RF95_REG_01_OP_MODE: 0 I ...
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My IC pins are too small

I bought an IC, but the little pins are too small to fit into the female end of the wire. I do not want to use a breadboard or solder the wires. Are there any solutions?
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1 answer
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UART and Max10?

I am searching the datasheets of the Max10 FPGA family from Intel, but I just can not find the information that I am looking for or I have a misunderstanding. My question: I want to create a UART ->...
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LS7220 IC question for HIGH and LOW

I am learning about the basics of electronics. I bought an LS7220 chip for a keypad lock, but using it turned out more difficult than I expected. I have attached it to a 9v battery at pins 9 and 14, ...
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1 vote
2 answers
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How to tell if pins are I/O from schematic?

I am using the Fusion360 New Electronics Library to reproduce the footprint/schematic of the NHS3152-AZ. Following along from Tutorial: Creating electronic components with Fusion 360, at min: 8:09 ...
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4pin camera with audio and video pin

I have found this camera from an old ATM machine. I want to use it but I don't have any knowledge about the video pin. Where I can connect to get video output?
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3 votes
4 answers
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Reverse engineer this old burglar alarm panel

I took apart an old magnetic door alarm, where when the contact is broken it counts down from 10 seconds for the user to input the code (which ranges from 1 to 8, there is no 0 or 9 key). This alarm ...
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1 answer
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Running Giant Gecko (EFM32GG11) bootloader-uart-xmodem software example

I'm new to Silicon Labs products and Simplicity Studio and was wondering if someone would walk through some basic steps to running the example serial UART bootloader on a Giant Gecko using the ...
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Battery replacment

I have a question about tablet battery. I have a Vodafone Tab prime 7 which needs a battery replacement and i figured out that i need Alcatel battery TLP058B2. The problem is this battery is ...
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Eagle - Create THT package with copper only on bottom

In Eagle 8.2.1 I want to create a package for a THT part. I only want to have copper on the bottom layer around the hole. I don't want copper on the top layer and I don't want the inside of the hole ...
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2 votes
1 answer
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How to ignore simulation only ports when mapping to FPGA pins?

A design has a number of simulation ports that should not be tied to FPGA pins. A VHDL example is shown in the source below, where the sim_only_* ports are for simulation only, thus should not be ...
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2 answers
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function of GND pin in voltage regulators [closed]

In a voltage regulator what is the function of the GND pin?I thought it was to create a reference voltage for the input/output but I have seen it being fed from the output of the voltage regulator ...
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1 vote
3 answers
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Is there a component that will provide an elevated SMD pad?

Is there a surface-mount component I can put on a pad, that simply has another pad on top that I can solder something on to? Here is a side view showing pins above the pads that would need bent down ...
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2 votes
2 answers
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Can I plug in too many LEDs (i.e. 26) on Arduino UNO?

So, I know Ohm's Law and that Arduino UNO R3 pins (digital 2 to 13) have a rated maximum of 40 mA, although it's better to consider that they have a maximum of 20 mA for safety reasons. If I put 2 ...
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1 vote
2 answers
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Pin 1 in OPA237UA in SO package

I have built some circuit and it doesn't work. Can I ask if my interpretation of datasheet is correct? There is no hole, no proper dot on my package, but there is a symbol with 2 concentric circles ...
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adapter to correct wrong pins DFN 10

I had some boards made and assembled, but made a mistake with a DFN 10 part, and reversed two pins in the layout. How do I fix it? Should I remove the part and create and insert an adapter board to ...
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1 vote
1 answer
379 views

Can I connect DTR Pin to CTS Pin?

I want to connect a Pixhawk 4 (It's a flight controller) to a Raspberry Pi 3. Therefor I purchased this FTDI USB adapter. Its pinout is the following: ...
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WAVGAT Arduino Pro mini I2C pins?

I'm trying to hook up an OLED display using I2C communication to my Arduino Pro Mini clone(with ATmega 168, 16MHz) from WAVGAT but I can't figure out where the I2C pins are on the Arduino.
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How to change the final value of several NetLabel at the same time - Altium Designer 21

I need to change the final value of the string in several NetLabel in Altium Designer 21. For example, I need to change RED0_U1 to RED0_U4, RED1_U1 to RED1_U4 and so on. I would like to know if there ...
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1 vote
2 answers
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Need help identifying Li-ion battery pin order on pager

I have several PERCOMM E80 pagers that are missing batteries. Usually I use my test battery with clamps on + and - to power up various electronics and it works like a charm. But not on this one. There ...
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2 votes
0 answers
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Looking for a 21 header pin 1.27mm [closed]

I've been looking all over for days but there doesn't seem to be a header pin. I'm looking for a 21 position header pin with a 1.27mm (0.050") pitch. Can someone point me into the right direction....
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If I drove pin DP8 high, would the MOSFET Q1 let current pass?

I have this circuit in my hand. If I drove pin DP8 high, would the MOSFET Q1 let current pass or would it not let it? I also have the same question for DP9. What would happen if I drove the pin DP9 ...
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1 answer
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Is there any more subtle convention for GPIO pin labelling between overlines, asterisks, and/or inverter symbols?

As a firmware developer, I've been given an old schematic that seems to have an inconsistency between pin naming conventions. Some of the signal lines from the microcontroller are labeled with an ...
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What is the difference between PTC and PORTC?

I am working on s32k144 controller in which I learnt how to configure pins as INPUT, while referring data sheet I got to know the base address GPIOC base address: 400F_F080h which is matching with ...
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