Tagged Questions
3
votes
2answers
188 views
Arduino Uno R3 hardware serial: peripheral interfering with the USB/Serial-converter?
I like to use the hardware serial port (pin 0 RX and 1 TX) to connect a bluetooth module.
Internally these pins are also ...
0
votes
1answer
13 views
Are there any DIP alternatives to the FT232R?
I'm currently using an Arduino on a breadboard, interfacing with it via a FT232R chip mounted on a breakout board. For my final design I'd ideally like to use all thru-hole components for ease of ...
6
votes
2answers
13 views
How can I mount a shield on a breadboard?
The non-standard spacing of the headers on Arduino boards makes it so the shields will not fit on a breadboard
From what I have read, there is no good reason for the non-standard pin spacing on ...
5
votes
4answers
17 views
How can I control more than 64 LEDs using a Uno?
I finished working on my 4x4x4 LED cube. I want to make a larger 6x6x6 cube. Is this possible ?
Which components should I use to control the LEDs ?
8
votes
4answers
55 views
How should I light up all the LEDs?
I am working on a 4x4x4 LED cube. I have connected all the negative terminals of LEDs in a horizontal layer to each other, and am using one Arduino pin per layer. I have connected all the LED positive ...
3
votes
2answers
66 views
Which version is my Ethernet Shield?
It seems that there are different versions of the Arduino Ethernet Shield available. How can I distinguish between the versions? How do I find out which hardware version I have?
Update:
Since Kevin ...
6
votes
2answers
23 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 ...
6
votes
2answers
13 views
Are there different Ethernet shields available?
Beside the w5100 chip powered Ethernet shield, are there shields available with other chips?
The w5100 seems to make a lot up problems. There are many Ethernet related problems documented on several ...
10
votes
3answers
58 views
What are the most common ways to fry an arduino?
I've fried two Arduinos before: one was an Uno, which I killed with too high of an input voltage, and the other was the ADK version of the Mega, which I never was able to conclusively determine what ...
3
votes
1answer
14 views
Can I use a USB keyboard with the PS2Keyboard library?
It is my understanding that most newer USB keyboards will not work with the PS2Keyboard library because they do not use the PS/2 protocol. Some, but not all, do have the ability to use the PS/2 ...
4
votes
1answer
32 views
Efficient way to get multiple analogue voltages out of an Arduino?
I've read in my research that most microcontrollers are not built with DAC outputs as they are expensive to include on silicon chips. Also applications that require analogue outputs typically need a ...
5
votes
2answers
17 views
How do I interface an XBee wireless module with the Uno?
I want to use an XBee wireless module with my Arduino Uno. How should I go about doing this? Do I need a shield like this one?
2
votes
1answer
39 views
Hologram project
I would like to do a project with an arduino that is a hologram screen. Is there a way to create a hologram project with an arduino? Is there any hologram hardware and can it be interfaced with an ...
2
votes
2answers
29 views
Interfacing a 16x2 Character LCD to the Arduino
A friend recently gave me a set of three (old) 16x2 LCD displays. (datasheet)
However, I'm having difficulty thinking through how to connect one to my Arduino. Particularly, each LCD has 14 (!) ...
5
votes
1answer
7 views
Capacitors on Arduino Due
An oddity I noticed in passing on the Arduino Due schematic, is the Atmel device requires a 4.7 μF capacitor on VDDOUT, but I only see 10 μF capacitors with 100 nF capacitors. How does this work?
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 ...
8
votes
1answer
12 views
Can I connect two different 1-Wire Devices to the same data pin on an Arduino?
I have used DS18B20 temperature sensors many times and understand that they can be daisy chained on the same data pin. Could two different sensors be connected in the same manner?
For instance, could ...
11
votes
3answers
50 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
62 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 ...
5
votes
1answer
43 views
How should I power my permanentified project?
I have transferred my project from an Arduino to a microcontroller. I want to make it into a permanent installation; for that I need to power it.
If I want to power it via a wallwart, what ...
10
votes
2answers
38 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
1answer
40 views
How should one switch from using an Arduino as a programmer to an external programmer?
Part two of a three part series on transitioning from Arduino to a plain AVR microcontroller and minimum supporting components (part one, part three)
I've seen a lot of people ask this on the ...
9
votes
2answers
32 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
76 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 ...
5
votes
2answers
12 views
What are methods to mitigate or reduce brown out resets?
How can I prevent or reduce the effects of low voltage causing the Arduino to reset? What would be the best proactive or reactive methods to deal with brown out resets?
Edit: is there a reactive way ...
8
votes
4answers
37 views
Is there any way that the Arduino board can get damaged by using a buzzer without a resistor?
I want to use a standard piezo buzzer on one of the Arduino Uno's analog pins without the use of a resistor. Will connecting this be a problem for the Arduino board? Why?
3
votes
2answers
8 views
How can I use 5V devices and sensors with a Fio?
I have a PS/2 barcode scanner that works fine with my Uno and the PS2Keyboard library. I'd like to hook it up to my Fio so that I can transmit barcode readings wirelessly, but the operating voltage of ...
7
votes
2answers
14 views
Does Arduino use step down voltage regulators?
I am designing my first "permanent" Arduino application, and I would like to know if the voltage regulator is linear or step down.
The reason I would like to know is because I am currently powering ...
8
votes
2answers
12 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 ...
6
votes
2answers
4 views
Check the quality of not original Arduino boards?
There are several reproduction Arduino boards available. How can I check that the board is wired correctly and that the ATmega chip and the other parts are comparable to the official design?
