Tagged Questions
1
vote
3answers
224 views
controlling SPI devices using the Arduino - different voltages
My arduino board uses 5v to power the atmega chip. I was wondering is there any thing wrong with powering my atmega at 5v but say I power my MCP4922 dac at 3.3v does it matter? It just that I've seen ...
6
votes
2answers
2k views
Solution for level-translation (3.3V Arduino Due <-> 5V shield)
The new Arduino Due board has its microcontroller running at 3.3V, but unfortunately most standard Arduino add-on shields (boards) run at 5V, thus their I/O signals are at different logic levels.
The ...
0
votes
2answers
172 views
Camera circuit with different voltage requirements on arduino
First off - i'm an EE noob, but i've muddled my way through a number of arduino projects, so have some experience there.
I'm building a breakout board for a CMOS camera sensor for use with an arduino ...
1
vote
2answers
553 views
How to communicate to ATmega328 with a PC
I need to connect the ATmega328 to a PC to show the datas that are gathered from the microcontroller, in Visual Basic .Net.
I have done it successfully using the Arduino board with USB cable.
But ...
4
votes
3answers
613 views
How can I know if I'm safe from burning out my robot with more voltage?
I have a Wowwee animatronic robot that I've been tinkering with, with the goal of hooking my arduino up to it so that I can control it from my computer.
The problem is, using a multimeter, I've ...
1
vote
3answers
537 views
Arduino Serial TX to iPhone RX voltage drop?
Articles I read about this tell me to hook up a 1KOhm resistor between the Arduino's TX and the iPhone's RX. I understand this is because Arduino's signal is 5V and I want 3.3V going to the iPhone.
...
2
votes
2answers
821 views
Logic Level Converter, Arduino and Cellphone
I am trying to interface a 6150 Nokia cellphone with an Arduino Duemilanove board, as some have already done through the FBUS protocol (see here for example).
The FBUS protocol uses 2.8V logic, so I ...
6
votes
2answers
3k views
How do I get an Arduino (5 V) and MPR121 (3.3 V) to talk?
I have the Sparkfun MPR121 I2C Capacitive touch sensor breakout board
I have read that it uses 3.3 V, I know that I can't just connect up the 3.3 V power supply output from the Arduino as the ...
2
votes
3answers
4k views
How do I shift voltage levels?
I want to use an RF12B to communicate over radio with an arduino, but the transceiver is rated at 3.3v. I hear I need to use a voltage level shifter, but what do these look like and where can I find a ...
