View Single Post
  #14   Spotlight this post!  
Unread 09-03-2004, 15:45
Joe Johnson's Avatar Unsung FIRST Hero
Joe Johnson Joe Johnson is offline
Engineer at Medrobotics
AKA: Dr. Joe
FRC #0088 (TJ2)
Team Role: Engineer
 
Join Date: May 2001
Rookie Year: 1996
Location: Raynham, MA
Posts: 2,648
Joe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond reputeJoe Johnson has a reputation beyond repute
EB is the only way to go.

Quote:
Originally Posted by Mark McLeod
Order the EB (evaluation board). It comes in a 20 pin mount that'll fit right into a regular printed circuit board.
The other is impossible to solder without very specialized equipment.
The ball grid array is a MAJOR pain to work with. It took a very skilled electrical tech in our building 4 hours to wire a single yaw sensor and another similar 2D accelerometer (ADXL202) with the circuit that comes build into the EB versions. The only reason we did it was to meet the $200 limit. Now that FIRST has made the limit $300 and has allowed us to use a $100 "EB" part while only accounting for a $50 "ball grid" part (see above), there is no way I would have had a team member spend that kind of time (the only benefit is that it "saves" $50 -- not worth 4 hours of a persons time).

Bottom line: Buy the EB version and run.

Joe J.