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31  Using Arduino / Project Guidance / Re: Vehicle tracking project using GSM/GPRS/GPS shield + Uno on: November 05, 2012, 03:38:54 pm
You could get some inspiration from this very similar open source project:
http://www.kickstarter.com/projects/dsscircuits/open-source-tracking-device?ref=live
32  Using Arduino / Project Guidance / Re: smallest possible wireless arduino? on: October 30, 2012, 10:23:49 am
Check out JeeNode:
http://shop.moderndevice.com/products/jeenode-kit
33  Using Arduino / LEDs and Multiplexing / Re: Sure Electronics new 32x16 bi-color display: 3216 RG -Cont. from read only forum on: October 28, 2012, 02:30:37 pm
This is what Don (a customer) said in an email regarding the same issue:
I did look at the clocking relationships on the scope.
The clock to data hold timing on the HC164 was marginal, 2ns, versus -2ns typical and 4ns minimum. Meaning it will probably work, but it's not certain. CLK, DATA and WR are buffered through 2 sections of an HC04, with a delay of 11ns, but CS_OUT is not, so with every successive board in a chain this timing degrades. They ran out of HC04 gates. Installing the 10pf capacitor at C1 might help, but it's not ideal.

34  Using Arduino / Microcontrollers / Re: How many times can the arduino(s) be reprogrammed? on: October 20, 2012, 01:52:33 pm
At least 10,000 times, according to the specs.
35  Using Arduino / Project Guidance / Re: Anemometer on: October 20, 2012, 01:50:47 pm
Here is a cheaper and easier to use alternative for you:
http://shop.moderndevice.com/products/wind-sensor
36  Using Arduino / Project Guidance / Re: Word Clock with RGB LEDs on: October 19, 2012, 12:38:44 pm
Take a look at ClockTHREE (launched on kickstarter a while ago), a word clock with individually controlled RGB LEDs.
37  Using Arduino / Project Guidance / Re: Saving a lot of temperature history on: October 19, 2012, 12:36:13 pm
Use a serial logger, like this:
https://www.sparkfun.com/products/9530
38  Using Arduino / Project Guidance / Re: How tall is this stack of plastic baskets? on: October 19, 2012, 12:31:51 pm
Quote
is the measurement of stack height via an ultrasound sensor. I wonder is the sensors can pick up the right height through the bottom grate. One basket is only an inch high so the disparity between a full stack (6') and a half stack may be too much for a precise measurement.
How about having the ultrasound sensor above the stack, measuring the distance to the top of the stack? (The height can then be calculated by subtraction.)
39  Using Arduino / Project Guidance / Re: Send RF signal to arduino from remote water leak sensors on: October 19, 2012, 12:27:17 pm
Quote
I want a wireless solution from the sensors to the central (arduino) unit.
Between the sensor and the radio you need a controller anyway. When I say "Arduino", I really mean an ATmega328 + crystal.
40  Using Arduino / Project Guidance / Re: Send RF signal to arduino from remote water leak sensors on: October 18, 2012, 06:55:14 pm
Arduino can pick up the leak signal directly, without wireless communication. Just connect the sensor to one of the inputs.
You can then interface your Arduino with a WiFi shield and transmit a warning to a server/etc.
41  Using Arduino / Project Guidance / Re: Please recommend a LCD on: October 18, 2012, 06:45:28 pm
or I2C:
http://www.adafruit.com/products/292
42  Using Arduino / Project Guidance / Re: Panic button that sends out text messages to staff on: October 17, 2012, 05:34:10 pm
Here (second half) is an example on how to use it:
http://www.seeedstudio.com/wiki/index.php?title=GPRS_Shield_v0.9b
43  Using Arduino / Project Guidance / Re: Panic button that sends out text messages to staff on: October 16, 2012, 08:40:32 pm
like this:
http://www.seeedstudio.com/depot/gprs-shield-p-779.html?cPath=132_134
44  Using Arduino / Project Guidance / Re: Input logger with rtc and pc interface on: October 15, 2012, 05:43:37 pm
There are integrated (SD card logger + RTC + ATmega328) solutions already out there:
http://wyolum.com/shop/20-i2gps.html
http://www.seeedstudio.com/depot/sdlogger-open-hardware-data-logger-p-723.html?cPath=132_136
etc.
45  Using Arduino / Project Guidance / Re: need help on gradustion project!1 on: October 15, 2012, 11:16:33 am
I found a tutorial on Bluetooth for you here:
http://arduino.cc/playground/Learning/Tutorial01
Interfacing with accelerometer(s) here:
http://arduino.cc/playground/Main/InterfacingWithHardware#motion_accelerometer
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