We found this circuit for 330 MHz using PIC in the magazine Electronics Now of December 1994. The circuit uses components common at the time.
Radio Electronics magazine published in a 90's issue this simple alarm that can use any general...
The duty cycle of a Schmitt Oscillator can be programmed by R1 and R2 in this circuit. The...
This first order Butterworth filter is tuned to frequencies around 1 kHz. The frequency is given...