View Single Post
  #13   Spotlight this post!  
Unread 18-09-2014, 08:35
Unsung FIRST Hero
Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
FRC #0111 (WildStang)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1996
Location: Wheeling, IL
Posts: 10,766
Al Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond reputeAl Skierkiewicz has a reputation beyond repute
Re: pic: How Not To Do It: Electronics Edition

Not exactly an H bridge since the legs are not independent. However, please add a fuse or breaker to this in the future. Not the 120 amp either, it must be safely sized for the smallest wire.
While it is unlikely to cause any harm at 12 volts, this is a good demo to show what was considered "safe" 100 or more years ago. I am reminded that when the IBEW was founded in 1891, the average life expectancy of a line worker was 36. It was common practice at that time to string power cables on poles that contained live wire using horse drawn wagons with ladders mounted on them.
To use this for household line voltage please remember that 120 volts is the RMS value not the peak, which is over 300 volts.
__________________
Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
________________________
Storming the Tower since 1996.
Reply With Quote