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841  Using Arduino / Interfacing w/ Software on the Computer / Re: Serial to VBA Best solution on: June 10, 2013, 07:39:26 am
You will find home at Windows PowerShell Script.

Quote
$port= new-Object System.IO.Ports.SerialPort COM3,9600,None,8,one #opens serial port - adjust parameters accordingly
$port.open() #opens serial connection
$port.Write("Hello World") #writes your content to the serial connection
$port.Close() #closes serial connection

http://newsofthewolf.wordpress.com/2009/09/25/powershell-and-arduino/

http://blogs.msdn.com/b/powershell/archive/2006/08/31/writing-and-reading-info-from-serial-ports.aspx
842  Using Arduino / Interfacing w/ Software on the Computer / Re: problem with Leonardo and firmata on: June 10, 2013, 07:16:02 am
@OP

Have you try this?

Quote
To use firmata with the Arduino Leonardo you must update the firmata library in the Arduino application to firmata version 2.3.2 or greater.

http://firmata.org/wiki/Main_Page

Upgrade Arduino IDE (even could try Beta version), then open the code with the File > Examples > Firmata > StandardFirmata menu, and then upload it to your Leonardo.

http://arduino.cc/en/main/software
843  Using Arduino / Networking, Protocols, and Devices / Re: Redpark cable on: June 10, 2013, 06:57:10 am
Got a link to "redpark cable"?

http://www.redpark.com/c2ttl.html


@OP

There are two version of the Pro Mini. One runs at 3.3V and 8 MHz, the other at 5V and 16 MHz.

http://arduino.cc/en/Main/ArduinoBoardProMini

http://forum.arduino.cc/index.php?topic=169544.msg1261837#msg1261837

if you have 3.3V version Pro Mini. You need skip Step 4 to make your own cable.
844  Using Arduino / Networking, Protocols, and Devices / Re: Choice of wireless module on: June 10, 2013, 06:18:46 am
1 sample per second per sensor

the bits is needed for one sensor is 8bits (R), 8bits (G), 8bits (B), 8bits (Sensor address).
the total bits per sensor= 32 bits
The total data rate= 32*16= 512 bits/sec
It is not high data rate.
845  Using Arduino / Motors, Mechanics, and Power / Re: [SOLVED] PROBLEM: DC MOTOR DRIVER 24V 43A + Arduino UNO on: June 10, 2013, 01:44:06 am
BTN7960 v.s. BTS7960

BTS7960  5.5~27.5V  43A discontinued

BTN7960  4.5~28.0v  47A in production
846  Using Arduino / General Electronics / Re: PWM & audio (tone or .wav) has noise? on: June 10, 2013, 12:52:37 am
Diagram for Plan C

...
2. use JFET current sink.



change Q1 and Q2 for support high current, and put Q2 on heatsink. connect Vin to output of Arduino DAC.

TI App note
847  Using Arduino / General Electronics / Re: PWM & audio (tone or .wav) has noise? on: June 10, 2013, 12:06:52 am
Plan D;-

http://forum.arduino.cc/index.php?topic=164233.0

make sure use PWM above 20 kHz.
848  Using Arduino / General Electronics / Re: PWM & audio (tone or .wav) has noise? on: June 09, 2013, 11:53:13 pm
diagram of noise cancellation (Plan A)

849  Using Arduino / General Electronics / Re: PWM & audio (tone or .wav) has noise? on: June 09, 2013, 11:44:21 pm
Quote
and a small capacitor across the input but that will reduce the frequency response of the amplifier



 a small capacitor across the input  is high pass filter, we have a lot nth harmonic. No work.


850  Using Arduino / General Electronics / Re: PWM & audio (tone or .wav) has noise? on: June 09, 2013, 11:40:20 pm
Quote
for 1) you could add very small capacitors to the signal to slow down the edges, and increase decoupling on the LED supply.



1 kHz PWM,  the base frequency is 1 kHz, then 2nd harmonic is 2 kHz ... 10th harmonic is 10 kHz...20th harmonic is 20 kHz. they are all in humans hearing range !  add very small capacitors will be no help.
851  Using Arduino / Networking, Protocols, and Devices / Re: Android + Arduino issues (over USB) on: June 09, 2013, 11:17:04 pm
How about try different Arduino ?

Duemilanove use an FTDI USB-serial chip

Uno use CDC-ACM serial-over-USB

Leonardo use USB's Connected Device Class CDC
852  Using Arduino / Networking, Protocols, and Devices / Re: How to automatically disconnect network? on: June 09, 2013, 11:02:22 pm
do not forget OP ask automatically/schedule function.
853  Using Arduino / Networking, Protocols, and Devices / Re: Choice of wireless module on: June 09, 2013, 11:00:31 pm
I have hard time to connect high transmission data rate with color sensor.
Try harder then.
There are a lot of colour to frequency sensors and the OP might be trying to send the output frequency.

maybe  you could show us how to send output frequency of color sensor directly to PC via X Bee or Bluetooth.  smiley-wink
854  Using Arduino / General Electronics / Re: Peltier based aquarium cooler/heater? on: June 09, 2013, 09:25:14 pm
http://forum.arduino.cc/index.php?topic=169717.msg1262798#msg1262798

Plan B ~ Plan F.
855  Using Arduino / Networking, Protocols, and Devices / Re: Android + Arduino issues (over USB) on: June 09, 2013, 06:56:21 am
Quote
The HTC Magic phone is quite an old model of Android phones, effectively it’s the second generation after the original G1 and was the first officially available Android phone in New Zealand. Whilst I have loaded the last stable version of Cynogenmod released for it onto the phone, it’s only Android 2.2 and doesn’t feature the Android USB Accessory API support, so there was no point getting something like the USBDroid model.

http://www.jethrocarr.com/2012/07/22/android-via-serial-to-arduino/

Could you upgrade Android OS at HTC Desire?

BTW, HTC Desire default OS is Android 2.3.x.
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