Raymundo Magana
  • Male
  • Monterrey, Nuevo Leon
  • Mexico
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Raymundo Magana's Friends

  • Guillermo Martinez
  • Mirac Aksugur
  • Pauli Seppinen
  • Guy McCaldin
  • William Premerlani
 

Raymundo Magana's Page

Profile Information

About Me:
M. Sc. in Automation and Control from Monterrey's Institute of Technology and Superior Studies.

Bachelor's degree in Mechatronics from Monterrey's Institute of Technology and Superior Studies.

Unmanned Vehicle enthusiast.
Hometown:
Monterrey

Raymundo Magana's Blog

New 65 Channel 10Hz GPS Receiver with Smart Antenna @ Sparkfun

Posted on April 6, 2010 at 10:15pm 31 Comments

A new 10Hz GPS is available on SF and it looks a lot more sturdy than the Venus module... Does anyone has it?

http://www.sparkfun.com/commerce/product_info.php?products_id=9758

Comment Wall (1 comment)

At 3:23pm on April 30, 2010,
T3
William Premerlani
said…
Hi Raymundo,

Regarding your questions about A/D conversion in the UAV DevBoard (UDB), relating to your plans for using a dsPIC30F40XX.

1. We tie the digital and analog power supplies together on the UDB. We have not seen any noise problem as a result. I think that is because the board is small, with very short connections. There are many low ESR, 0.1 uF caps distributed around the board, at least 13 of them, and a couple of 10 uF caps, I think that helps.

2. With regard to the requirements for supplying the A/D inputs, you should read the Microchip documents to make sure you understand what is needed. In the case of the accelerometer connections in the UDB, there is a 0.1 uF capacitor for each accelerometer input, connected from the dsPIC A/D input to ground. Take a look at the accelerometer section of the UDB schematic, you will see it. It is part of an anti-aliasing, low pass filter, but it also plays an important role in supporting the signal while it is being sampled. You will need to do something similar.

Best regards,
Bill

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