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Changing Pot size on 555 PWM circuit

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FireAce

FireAce

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Hey guys, need a lift on changing the 220k speed pot in this circuit to a 100k pot. Is this possible? Thanks!
 

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Sure, just change the 220K to 100K and change the capacitor connected from the bottom end of the 220K to ground from 0.1uF to 0.22uF.

I dont think the author intended you to use a 220K pot (I have never seen one); more likely a 500K pot set to 220KΩ.
 
Hey Mike, thanks for the reply, except I just realized I used my last 100k pot in my last project, but I do have several 50k's laying around. I dont know how to figure this, but would you?
 
Rold*Cold = Rnew*Cnew
 
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