Need help adjusting 556 circuit (pwm)

Thread Starter


Joined Jul 4, 2012

C1 = 680pF; C2 = 0.01 μF; C3 = 0.1 μF; C4 = 10 μF, polarized.* R1 = 1k, R2 10k

I would like to use this specific circuit, but adjust it to provide a 16khz pwm signal as my fan specifications call for it.

Please email the solution to me at Thanks a bunch!!