Circuitbenders Forum

Circuitbenders Forum => Circuitbending discussion => DIY Synths => Topic started by: jamiewoody on March 15, 2010, 09:15:19 AM

Title: lower frequencies on 555 based synth...
Post by: jamiewoody on March 15, 2010, 09:15:19 AM

i have been breadboarding like crazy and making a lot of discoveries.

if i am making a simple 555 based synth circuit, how do you make a lower frequency? i tried higher resistors, which i had in stock, a 51k and a 47k...this seemed to make somewhat of a difference, but it also seemed to crash more.

advice?

Title: Re: lower frequencies on 555 based synth...
Post by: noystoise on March 15, 2010, 04:32:31 PM

use bigger caps like 1uf-10uf. should help.

Title: Re: lower frequencies on 555 based synth...
Post by: Circuitbenders on March 15, 2010, 07:31:14 PM

Check out the 'Choosing R1, R2 and C1' section on this page:

http://www.kpsec.freeuk.com/555timer.htm (http://www.kpsec.freeuk.com/555timer.htm)

Title: Re: lower frequencies on 555 based synth...
Post by: jamiewoody on March 15, 2010, 09:33:24 PM

i'll check these things out...thanks!

is there a formula (in layman's terms) for capacitance and frequency?  higher capacitance=lower frequency?

Title: Re: lower frequencies on 555 based synth...
Post by: druzz on September 02, 2010, 04:21:43 PM

Quote from: Circuitbenders on March 15, 2010, 07:31:14 PM

Check out the 'Choosing R1, R2 and C1' section on this page:

http://www.kpsec.freeuk.com/555timer.htm (http://www.kpsec.freeuk.com/555timer.htm)

thanks this is a very nice document to help my 555 projects expanding !!