Resonant Scanning Circuit Figure 8

Started by unknown · date unknown · 4 posts

1. Aurgus

   #1 · date not recorded

   I'm guesing this 555 in the Resonant Scanning Circuit, Figure 8, is set up for a 3 secound pulse. Any body know?
   Think that is a 10uf cap and a pair of 220K resistors.
   

   attachment_10137 555-2.JPG

2. aty

   #2 · date not recorded

   See this
   
   Aty

   attachment_10178 Figure 8 modified.JPG

3. TonyWoodside

   #3 · date not recorded

   Yea the Scanning circuit is setup to a frequency of 0.218 Hz and a duty cycle of 66.7%. Meaning the On time = 3.0492 sec and Off time = 1.5246 sec.

4. Aurgus

   #4 · date not recorded

   Thanks Tony,
   I use 4047’s instead of 555’s. Got tired of the 555s going toes up  and dying on me for no reason. It also lets me use a single power rail. By using a 10 volt regulator it is very stable.