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1  Using Arduino / Sensors / Re: BMP085 Sensor Not Working on: November 15, 2012, 08:06:16 am
I gave it one last chance and fiddled around with a few of the wires and it miraculously worked! I think the jumper wires that I have aren't very good.
2  Using Arduino / Sensors / Re: BMP085 Sensor Not Working on: November 15, 2012, 05:43:41 am
Ok, thanks. I pretty sure that I haven't connected it to a 5V supply.

Looks like I'll be sending it back then!
3  Using Arduino / Sensors / Re: BMP085 Sensor Not Working on: November 15, 2012, 04:38:45 am
I have just tried wiring it directly instead of jumping around the breadboard on both an arduino nano and uno and neither picks up the sensor.

However, on the nano just after uploading the sketch I keep getting this pop up at the bottom "avrdude: stk500_getsync(): not in sync: resp=0x00".
4  Using Arduino / Sensors / Re: BMP085 Sensor Not Working on: November 15, 2012, 03:47:22 am
Here is a picture of the circuit layout and I can't see much wrong. I've also tried using the adafruit library (https://github.com/adafruit/Adafruit-BMP085-Library) and this too says that the sensor cannot be found.

5  Using Arduino / Sensors / Re: BMP085 Sensor Not Working on: November 14, 2012, 08:29:56 am
I've got the VCC pin going to 3.3v and GND to ground.

Have you got to configure analog pins 4 and 5 for i2C or is that what the wire library does?
6  Using Arduino / Sensors / BMP085 Sensor Not Working on: November 14, 2012, 07:14:35 am
I have connected up a BMP085 barometric pressure sensor (breakout board) from sparkfun to an arduino nano using the i2c bus (A4 - SDA and A5 -SCL) and it doesn't seem to be recognised by the arduino.

I've run the arduino i2c scanner (http://arduino.cc/playground/Main/I2cScanner) to see if anything is connected and it returns "No i2c devices found".

Does anybody know what's going on?

BMP085 Sensor Link - http://proto-pic.co.uk/barometric-pressure-sensor-bmp085-breakout-new/
7  Using Arduino / General Electronics / Re: LCD Display + MicroSD Breakout Board on: November 08, 2012, 03:05:17 pm
Thanks. I think I'll need to use the SPI protocol then as I've got a BMP085 barometric pressure sensor connected using the I2C pins.
Actually you can't.  I believe on the Nano, SPI uses pins 10-13.  However, I2C is a bus, and you can connect multiple devices on the bus, as long as each device has a different address.

How do you connect multiple devices to the bus?
8  Using Arduino / General Electronics / Re: LCD Display + MicroSD Breakout Board on: November 08, 2012, 02:51:12 pm
Thanks. I think I'll need to use the SPI protocol then as I've got a BMP085 barometric pressure sensor connected using the I2C pins.
9  Using Arduino / General Electronics / LCD Display + MicroSD Breakout Board on: November 08, 2012, 02:22:57 pm
I have an application which requires both an LCD display and a MicroSD breakout board connected to a arduino nano.

The problem I have is that both of these components require the use of digital pins 11 (MOSI) and 12 (MISO), therefore is it possible to have both of these components in the same circuit and if yes, how would I go about doing it?

I have provided the links to the components below:

http://proto-pic.co.uk/basic-16x2-character-lcd-white-on-black-5v/
http://proto-pic.co.uk/microsd-card-breakout-board/
10  Using Arduino / Sensors / Re: Accelerometer's on: October 28, 2012, 03:57:07 am
This is the circuit that I have designed for my application. Can you see any obvious mistakes or ways that I could improve the circuit layout?

Ideally I'd like to get all of the components on a single half breadboard (except the display) but I don't know if this will be possible.

11  Using Arduino / Sensors / Re: Accelerometer's on: October 28, 2012, 03:23:55 am
What kind of speeds are we talking about here?
12  Using Arduino / Sensors / Re: Accelerometer's on: October 27, 2012, 05:04:19 am
Thanks.

Do you think that it would be possible to have an accelerometer, shift register, 4-digit 7 segment display, LED, push button and Arduino Nano on all on the same breadboard (half)?
13  Using Arduino / Sensors / Re: Accelerometer's on: October 27, 2012, 04:55:08 am
I'm fairly new to electronics and haven't really done alot. I suppose i'd be looking to calculate the angle every second or so.

The ultimate aim of the project is to build a handheld device which is capable of detecting slopes (i.e. angles) when placed on surfaces or objects.

If I'm right in saying the digital one is the MMA8452Q accelerometer?
14  Using Arduino / Sensors / Accelerometer's on: October 27, 2012, 04:05:59 am
Which of the following accelerometers is best? I would like to use one in order to calculate the angle in which a device is being held.

Triple Axis Accelerometer Breakout (MMA7361) - http://proto-pic.co.uk/triple-axis-accelerometer-breakout-mma7361/
Triple Axis Accelerometer Breakout( MMA8452Q) - http://proto-pic.co.uk/triple-axis-accelerometer-breakout-mma8452q/
15  Using Arduino / Displays / Re: Arduino Nano + 7 Segment Display on: October 25, 2012, 02:24:22 pm
I'm a mechanical student and have no idea on electronics.

We're going to be getting some help from an electrician at university, but I'd thought some research wouldn't go a miss first.
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