Simple circuit for generating a two-tone roger-beep
This two-tone Roger Beep is very well suited to replica for electronics beginners, because it only a few and very insensitive components are needed.
The 330μF electrolytic capacitance determines the total length of the roger beep, the 150μF electrolytic, after how long the sound is switched over. With other values, the duration can be adjusted to your own wishes. Also, the circuit can be match with it, if relays are used with deviating coil resistance.