how do i calculate the frequency of this circuit?

Thread Starter


Joined May 4, 2005
Someone please take a look at this circuit, I really really really need to know how these particular frequencies stated under the diagram were calculated through the circuit, please help?!?!? how did he come up with a 1Hz cycle rate, and where did he get the right timer's frequency to alternate between 440Hz and 550Hz, how did he calculate 440Hz and 550Hz?