View Single Post
  #12   Spotlight this post!  
Unread 10-31-2005, 08:15 AM
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: 2,629
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
Re: manual control of a victor?

The 555 is one of the most important pieces of standard hardware on the planet (KenWittlief's prof's opinion not withstanding). Bias against it may well be justified, but it does not take away from the fact that the world as we know it would simply (and literally) grind to a halt if the anti-555 snobs waved a wand and made all the 555's in the world disappear.

I take the more practical approach of Steve Ciarcia, who said, "Solder is my favorite programming language."

Driving a Victor with 2 555's is a piece of cake (use a 556 - it has 2 555's in one package). Go HERE for some easy examples of how to make useful 555 circuits. The basic idea is to have one 555 set to make a 50Hz signal and have that repeatedly trigger a "one shot" that will give you the pulse for the Victor (roughly .5ms - 2.5ms pulse).

Joe J.
__________________
Joseph M. Johnson, Ph.D., P.E.
Mentor
Team #88, TJ2

Last edited by Joe Johnson : 10-31-2005 at 08:18 AM.