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freakypenguinboy
New Member

USA
2 Posts
Posted - Aug 28 2009 :  9:08:48 PM  Show Profile  Reply with Quote
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Edited by - freakypenguinboy on Dec 10 2013 4:24:16 PM

Aaron Cake
Administrator

Canada
6718 Posts
Posted - Aug 29 2009 :  10:21:29 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
Tolerances in the parts used vary. Play with the capacitor value a bit up and down, as well as the resistor.
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pebe
Nobel Prize Winner

United Kingdom
1078 Posts
Posted - Aug 29 2009 :  10:34:05 AM  Show Profile  Reply with Quote
90 degrees is the normal movement for a servo.

The 555 in that mode is prone to variation with changes in the supply rail. Try fitting a 100 microfarad capacitor across the supply pins.
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audioguru
Nobel Prize Winner

Canada
4218 Posts
Posted - Aug 29 2009 :  3:46:06 PM  Show Profile  Reply with Quote
I think the timing resistors should be 10 times their value so that a 100nF 5% film timing capacitor can be used.
I agree that a supply bypass capacitor should be added.
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freakypenguinboy
New Member

USA
2 Posts
Posted - Aug 30 2009 :  4:18:11 PM  Show Profile  Reply with Quote
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Edited by - freakypenguinboy on Dec 10 2013 4:24:40 PM
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Aaron Cake
Administrator

Canada
6718 Posts
Posted - Dec 14 2013 :  10:25:17 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
I have half the mind to restore this topic to whatever it was previously via backup...
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