Search found 8 matches

by puffyfish
Tue Mar 02, 2010 8:22 pm
Forum: USB Development
Topic: need smaller connectors..
Replies: 1
Views: 1379

need smaller connectors..

I've got a 600 mhz arm processor connected to a USB hub with a USB on the go cable. I need to shorten this cable somehow.. how can I do that? I also have 3 mini usb devices that I need to connect to the hub, I need the smallest converters possible for these. Here's a pic: http://bayimg.com/image/pak...
by puffyfish
Sun Nov 15, 2009 4:21 pm
Forum: USB Development
Topic: Serial to USB for GPS device.
Replies: 2
Views: 1042

Thanks for reply. Not really USB but:
I just found out my ARM board has 3 GPIO pins I can read. I'm looking into the linux documentation on this. Hopefully I can just plug in the TX pin and read ascii data from it using linux/gpio.h
by puffyfish
Sat Nov 07, 2009 1:42 pm
Forum: USB Development
Topic: Serial to USB for GPS device.
Replies: 2
Views: 1042

Serial to USB for GPS device.

I have an ARM board with only USB connections. I'd like to use one of sparkfun's GPS devices with it but I don't know how to connect one to USB. How can I convert the serial to USB? The GPS eval board at sparkfun is just too big. What do I need to buy?
by puffyfish
Mon Nov 02, 2009 4:53 pm
Forum: SparkFun Product Questions
Topic: My GPS project.
Replies: 6
Views: 1180

After some searching I purchased a $100 200MHz AVR9 board with 5 usb ports. Now if I can only figure out how to control servos and electric motors over USB. I plan on rolling my own linux kernel and filesystem with debootstrap cause I'm a perfectionist. I think I'll just have init exec my program di...
by puffyfish
Fri Oct 30, 2009 7:36 pm
Forum: SparkFun Product Questions
Topic: Problems with Sparkfun Serial Enabled 16x2 LCD w/Ardunio 5v
Replies: 4
Views: 1178

You need to set the gamma on the LCD. It can be done with a resistor or potentiometer.
by puffyfish
Fri Oct 30, 2009 7:24 pm
Forum: SparkFun Product Questions
Topic: PIC-based Geiger counter
Replies: 11
Views: 8179

How do you test a Geiger counter device? where could you find radioactive sources? would a cathode ray tube tick a Geiger counter?
by puffyfish
Fri Oct 30, 2009 7:13 pm
Forum: SparkFun Product Questions
Topic: My GPS project.
Replies: 6
Views: 1180

I will start with manual control and slowly automate it. I'm thinking of using an ARM board running Linux if I can find one small enough.
by puffyfish
Thu Oct 29, 2009 5:20 pm
Forum: SparkFun Product Questions
Topic: My GPS project.
Replies: 6
Views: 1180

My GPS project.

I made a simple GPS device on a breadboard. I'm writing a control system for a remote control plane. I wrote a c++ class that parses the NMEA serial data, then output info to the LCD using arduino libraries. Compiled from the command line using SCons python build system, and uploaded to the board us...