The pins tag has no wiki summary.
0
votes
1answer
92 views
Are there “female” 2.54mm screw terminals?
There are a variety of male screw terminals with pins one can solder into a PCB. Are there female screw terminals that fit directly over the 2.54mm pitch/spaced "jumper" pins that small boards like ...
2
votes
6answers
125 views
Identifying pin numbers from PCB
I have a PCB with documentation. In the documentation, there is referred to specific pins of several jumpers and connectors. On the PCB however, there isn't a label or so for which pin has what ...
4
votes
1answer
53 views
analogRead(0) or analogRead(A0)
The arduino reference states that you would use the following code to read the value from analog pin #5:
int val1 = analogRead(5);
However to read from digital ...
6
votes
2answers
31 views
What's the difference between INPUT and INPUT_PULLUP?
On newer Arduinos, one can set pinMode to one of three states: OUTPUT,INPUT, and ...
10
votes
2answers
35 views
Why do some pins have `~` signs next to their numbers?
I was looking at my Arduino Uno and I noticed that symbol by digital pins 11, 10, 9, ...
6
votes
1answer
9 views
Problem stacking accelerometer and SD card shields on Arduino UNO
I have an ADXL345 accelerometer on a Makershield stacked on top of a Seeed SD card shield. Both of those are stacked on an Arduino UNO R2.
I've got each working individually, but when stacked they ...
11
votes
3answers
58 views
I burnt a pin. Now, what do I do?
I accidently shorted pins 10 and 11 with 10 set to output HIGH and 11 set to input. The pin 11 is not working. How do I figure out what component I burned?
Can the problem be fixed?
8
votes
1answer
64 views
Unlabeled Headers/Pins on Arduino Uno
Looking at my Arduino Uno, I noticed that not all of the pins/headers are labelled. I know what most of the pins do, but could not figure some of them (most not labelled at all, and one set labelled ...
10
votes
2answers
43 views
Working with a sensor and a motor, can I use both or should I use a motor shield?
Update: I'm currently changing a few things with the project. I took some of you advice. I've changed from a stepper motor to a RC servo (controlled through PWM) and if I run into any problems and ...
9
votes
2answers
34 views
Pin 13: Do I need a Resistor?
This question mentioned that pin 13 has a built-in resistor for the LED that comes standard on most Arduino units. A friend of mine told me that because there's already a resistor on the pin, I don't ...
10
votes
4answers
93 views
Can I use the analog pins on the Arduino for my project as digital?
I am new to using Arduino, and I have an Arduino Uno. For the projects I've done, I've only used the digital pins.
I am building a small vehicle that uses stepper motors. I have run out of pins to ...
8
votes
2answers
13 views
Is there any difference between pin 13 and the rest of the pins?
Pin 13 has a surface mounted LED on it. Aside from the fact that it makes something light up, is there any non-negligible difference between this pin and a general digital pin?
For example, if I ...
3
votes
1answer
117 views
What happens when you set a pin in the wrong direction?
All MCU's have digital pins, which you can configure to function as input or output.
When you set something to 'output' which is wired as an 'input', will there be any possibilities of short-circuits ...
-6
votes
1answer
112 views
Fried Arduino uno pins. yet I can blink led 13. anything plugged in does nothing [closed]
I don't really know what happened. I was using a 5 volt relay and now nothing works. I can upload sketches to it and blink led 13 but anything plugged into it does nothing. the 5volt and grounds don't ...
2
votes
3answers
344 views
Using the PICkit3 and PIC18F4550
For my microcontrollers class, I am using an advanced 8-bit microprocessor, the PIC18F4550. I am trying to program it with a PICkit 3.
I have used the device datasheet and the PICkit 3 datasheet to ...
7
votes
5answers
234 views
Is there a way of telling if the connector is male or female on a schematic?
For example, in the RS232 here:
or here:
6
votes
2answers
377 views
Soldering leads/pins to SMD/SMT for solderless breadboard prototyping?
Background:
I just began with electronics and I'm looking to build a 12v to 5v converter circuit. My plan is to use a Murata 78SR-5 to power either an Arduino or Rasberry Pi. I'm studying electronic ...
2
votes
1answer
791 views
Arduino & JY-MCU Bluetooth module
I've got a bluetooth module from dx and connected it to my Arduino UNO R3. It was working just perfect but after a couple of hours of work it just stopped sending data.
I think, the problem is with ...
-2
votes
1answer
76 views
Four conductor, solder pin, ceramic plug - source? [closed]
I have a ceramic connector for a wireline system that has no part number. I am looking for some assistance in identifying it and sourcing new units, any help would be greatly appreciated. I have ...
3
votes
1answer
245 views
Easier-to-machine alternative to pogo pins?
My project has a rectangular 5 x 6 grid, 1mm pitch pin header. Unfortunately, it needs to be cycled by the user over 300 times!
We've looked at pogo pins, because of the high cycle count, but the ...
12
votes
3answers
1k views
General “rule of thumb” for unused IC pins
This is somewhat similar to this question about NC pins. In cases where the datasheet doesn't specify what to do with unused IC pins, what is the recommendation to do with these pins? In particular ...
5
votes
2answers
114 views
Power consumption of unimplemented pins?
New versions of TI's Code composer studio have a lint-like tool which checks the code and provides recommendations on how to modify the code to decrease power consumption. One of the things I've ...
4
votes
3answers
743 views
I can't use digital ports with my raspberry pi?
I have a raspberry pi that I really want to be able to control some motors and was thinking of this one at sparkfun: http://www.sparkfun.com/products/9670
The problem is that the Pi does not have ...
0
votes
1answer
199 views
What are the pins?
I'm looking at a motor controller, the Motor Driver 2A Dual L298 H-Bridge, and since I'm pretty new at this I'm wondering what the pins are:
...
0
votes
0answers
293 views
Internal USB (4 pin) on external (9 pin) header [closed]
I want to transfer some internal peripherals (Wifi card, RF receiver) from my current mo-bo to a new one. Upon inspection it turned out they all have 4-pin internal USB connectors, connected to the ...
7
votes
1answer
294 views
Meaning of hash symbol in pin name
I'm reading the datasheet of a PSRAM (available here). In the top-right hand corner all the pins are listed. Some of the pin names end with a hash, e.g. LB#, ...
4
votes
3answers
770 views
Setting pin to high in function instead of main, not full voltage output?
I have a function which turns on a LED by setting PB1 to HIGH. The light from the LED is barely visible. If I set PB1 to HIGH in my main function the light from the LED is as bright as it should be.
...
8
votes
3answers
3k views
Which chemicals can be used to clean electronics?
I have access to these
isopropyl alcohol
ethyl alcohol
vodka
rum
acetone
And would like to know which ones should be used to clean electronics, and (out of curiosity) why some are worse choices ...
2
votes
2answers
980 views
Why are 555 IC pin diagrams so random?
I was going to start learning how to use a 555 timer as an oscillator, however am greatly confused in the pin configurations example schematics provide me.
To show visually what I mean, A random ...
5
votes
2answers
323 views
What exactly are 'pins'?
I actually ran into this question just a few moments ago:
http://serverfault.com/questions/12025/intro-to-laptop-hard-drives
The first answer is the one that caught my attention.
Apparently, there ...
0
votes
2answers
178 views
ARM LPC1751 pins configured as I/O
I'm new to microcontroller programming. How can i configure one pin for input and another for output. If I am not wrong this could be done with GPIO registers that control device pins that are not ...
8
votes
3answers
492 views
C++ classes for I/O pin abstraction
I am looking for C++ abstractions for hardware I/O points or pins. Things like in_pin, out_pin, inout_pin, maybe open_collector_pin, etc.
I surely can come up with such a set of abstractions myself, ...
1
vote
1answer
79 views
Freescale MCP8260, don't understand pins
I am looking at the Freescale MCP8260 processor.
For programming PINS you set values to some registers.. I would like to use MII interface for Fast Ethernet for example... I can see the Dedicated ...
1
vote
2answers
117 views
How is the board connected to this chip?
I have a dataflash memory that is too small to fit on a prototype board, so it has been put on a small board. I am having trouble figuring out where pin 1 is on this board. Below is a picture of the ...
24
votes
4answers
14k views
Why are there 3 pins on some batteries?
Lots of new batteries (for mobile devices, MP3 players, etc) have connectors with 3 pins.
I would like to know what is the purpose of this and how should I use these three pins?
They are usually ...
1
vote
2answers
320 views
System Generator: How to configure the pins for the signals of your design?
I am programming a FPGA by System Generator. I have done this design:
I don´t know what are the respectives pins of my FPGA for the blocks of my design called 'Gateway In' and 'Gateway Out'. I would ...
3
votes
3answers
828 views
What is a pinout of TOP side of Intel Core i7?
There is a core i7 cpu
It have some contact pads on top side, some grouped in 4 or 6 and a two big groups.
Is there a pinout of this pads? Where is a JTAG?
10
votes
2answers
282 views
Sockets or pins, and why?
I think I've found a solution for my previous question and I'm now going to order some FCI "Clincher" connectors from a local supplier to try them out.
My question is, should I terminate the ends of ...
4
votes
3answers
243 views
LPC2131 problem reading IO pins
I need to read a value from a DIP switch. It is connected to ports P1.16 till P1.21. I use following code:
to initialize:
...
9
votes
2answers
578 views
What are 'return' pins?
On a VGA connector, there are numerous 'ground' pins. Three of these are Red return, Green return and Blue return; But why does each color component have its own ground pin?
11
votes
2answers
2k views
5
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8answers
3k views
Pins in the Arduino
If i'm running out of Pins to put things in on the Arduino -> short of buying a second one or getting a Mega - is there a way to get more happening on the one board?
Do i need to worry about ...
