Author Topic: Resonant Scanning Circuit Figure 8  (Read 1778 times)

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Resonant Scanning Circuit Figure 8
« on: November 19, 2011, 21:08:47 pm »
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.

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Re: Resonant Scanning Circuit Figure 8
« Reply #1 on: November 22, 2011, 18:08:03 pm »
See this

Aty

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Re: Resonant Scanning Circuit Figure 8
« Reply #2 on: November 22, 2011, 18:54:49 pm »
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.

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Re: Resonant Scanning Circuit Figure 8
« Reply #3 on: November 23, 2011, 15:52:51 pm »
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.