This circuit was found in the October 1994 issue of Electronics Now magazine. The 40446 IC is a PLL that is not very common today. The circuit has two types of effects.
This simple rain, leak or moisture detector circuit appears in other places on this site with...
In the figure we show how to add a 100k ohms potentiometer to implement an oscillator controlled by this...
This circuit divides frequencies of up to about 7 MHz by 10 and by 100. The input signal must be...