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1  Using Arduino / Installation & Troubleshooting / Re: Arduino v 1.0.2 with Mac OS 10.8.2 on: November 14, 2012, 12:09:40 am
James, I bought the Arduino from Amazon about 1.5 years ago. It had been working OK but my problems began with OS10.8.  Now I do not have the USB option from the Tools>Serial Port, only Bluetooth. Arduino only installed Bluetooth options in the Tools menu.  I checked my Macbook, OS10.7,  and it only has Bluetooth options in the Tools>Serial Port menu, no USB.  I tried Arduino versions 1.0, 1.01. and 1.0.2.  My Mac and Arduino do not play well together.
Hmmmm, Same problem here. I cannot find the USB as well
2  Using Arduino / Displays / Re: Issues about using LCD with Arduino under LabVIEW on: November 11, 2012, 11:38:54 am
Do you mean you are using arduino in LabVIEW? Arduino pin 0 and 1 are hardware serial pins.
Yeah, that is the reason. You can control Arduino in LabVIEW using LabVIEW Interface For Arduino(LIFA).
3  Using Arduino / Displays / Re: Issues about using LCD with Arduino under LabVIEW on: November 08, 2012, 11:31:50 am
What hardware module then?
I solved this already, just because pin 0 and pin 1cannot be used in VI. I change them to another two pins. It works
4  Using Arduino / Displays / Re: Issues about using LCD with Arduino under LabVIEW on: November 07, 2012, 11:56:42 pm
I use LabVIEW. It's in totally different world from Arduino. Why are you juxtaposing these two concepts? What module are you using to drive the LCD with LabVIEW?
I use LCD module under Sensor.
The LCD configuration VI.
5  Using Arduino / Displays / Issues about using LCD with Arduino under LabVIEW on: November 07, 2012, 10:28:37 pm
Hi, everyone, I have one problem about using LCD with Arduino under LabVIEW.
I am not sure how many people here using LabVIEW. Just try some luck.
Here it is:
I purchased this http://www.amazon.com/gp/product/B0059H60SK/ref=oh_details_o01_s00_i00from Amazon--"microtivity IM161 LCD Module 1602, White on Blue with Backlight"(I believe many people use this model)
And follow the intruction from its website and try the "HelloWorld" Example on Arduino.

I connect RS with pin0, Enable with pin1, RW with ground. DB4 with pin2, DB5 with pin3, DB6 with pin4, DB7 with pin5.
It is successful to run hello world.
I try the same connection on LabVIEW.
The extra configuration choice is "LCD". This is the power to LCD. So I connect port 15 with pin 6 through zener diode.
And set LCD to 6.
I got error code. No Helloworld. Is there anyone know how to solve this?

For people who use LabVIEW:
I checked out the configure VI inside. I don't know why should we set up LCD option. Why don't directly wire the "A" on LCD to power?
 
Rocky
6  Using Arduino / Displays / Re: how to wire LCD with SPI on: November 02, 2012, 08:21:12 pm
If you are not using Pin 13 for SCK, then you are not using SPI.
Maybe faking it with software SPI.
I mean it looks like they are conflict with each other
7  Using Arduino / Displays / how to wire LCD with SPI on: November 02, 2012, 07:25:02 pm
HI, guys.
I have one question about how to wire up LCD to Arduino
In my project, I connect MCP4822 with Arduino through SPI. So pin 12 and pin 10 are used for Arduino. Now I want to use LCD to show the output current. But Most of tutorials show the LCD using 12-10 for RS and RW. So I want to know could I use Pin 1-3 instead of pin 12-10.
I just want to make sure this.
Thanks
8  Using Arduino / Project Guidance / Arduino meets Android on: August 07, 2012, 05:03:48 pm
Hi, everyone, I have one project idea and I want to know if it is feasible.
Currently, I am using LabVIEW for arduino interface to control arduino talking with one SPI chip so that it could output voltage. Now I want to move the controller from laptop to the cellphone or tablet. I want to know whether it could be achieved. And which protocol should I use, bluetooth or USB?
Thanks
9  Using Arduino / Project Guidance / Photon Counter Using Arduino on: June 27, 2012, 08:42:40 am
Hi, I have one question here. Is anyone here tried to make a photon counter using Arduino? It is probably that we need to make one for future project, so I want to get some ideas ahead. Thank you
10  Using Arduino / General Electronics / Re: Arduino with MCP4822 through SPI on: June 14, 2012, 02:26:14 pm
The integer "2" means word size.
11  Using Arduino / General Electronics / Arduino with MCP4822 through SPI on: June 14, 2012, 02:22:53 pm

Hello, everyone. I have problems with using Arduino with MCP4822 through SPI in LabVIEW. Above pic is my VI. MCP 4822's command is 16-bit.
Bit 15: DACa or DACb select
Bit 14: dont't care
Bit 13: Output Gain bit
Bit 12: Output Power-Down Control Bit
Bit 11-0:: DAC data bits.
In my project, I need to set up D11-D0 to get an ouput voltage with 12 bit resolution. Here is my command

Could anyone help me? Thank you
12  Using Arduino / General Electronics / Re: PWM to Voltage Improvement on: June 07, 2012, 03:21:27 pm
Remember that the filter cutoff component mustn't be a part of the response time of the PID algorithm or it will decidedly skew the PID response.

Doc
Yeah, you are right. Could you explain this further?
13  Using Arduino / General Electronics / how to extend pwm to 10 bits on: June 07, 2012, 02:53:43 pm
Hi, everyone, I am confused by how to extend pwm to 10 bit. It looks like using timer1 library could do this. Is this real? Thank you for help
14  Using Arduino / General Electronics / Re: PWM to Voltage Improvement on: June 06, 2012, 11:14:04 pm
And set the cut off frequency as 20 Hz, right?
15  Using Arduino / General Electronics / PWM to Voltage Improvement on: June 06, 2012, 09:54:00 pm
Hi, I am new to Arduino.I have one question about converting PWM to voltage. In our project´╝îwe use Arduino with LabVIEW to finish PID control. We input time duty to arduino through labview and output voltage. Since the project is about laser stabilization, we need accuracy of output voltage. Arduino's PWM is 8-bit, this is fine. Probably we would try Maple Board with 12-bit PWM next. Currently, we are using basic Simple RC circuit to convert PWM to DC. I want to know how could I improve this except changing resistor and capacitor combination? Thank you for help.
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