This circuit is used in a LASER detection system to avoid echoes from short distances in systems up to 1 mile. The circuit is from a 1967 documentation.
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...