This circuit causes an LED to flash at a frequency determined by the capacitor. The circuit is powered by only 3 V and can be used for signaling.
This circuit was found in Radio Electronics from the 90s. The CMOS integrated circuit is a PLL not...
The integrated circuit used in this application is not very common. Transistors and resistors...
Frequencies other than the one for which this filter was calculated can pass with a unit gain to...