It is used in teaching music in rhythmic gymnastics, in experiments in physics etc. a Metronome, a scheme which offers Bulgarian journal “Radio Television Electronics” (see Fig.), gives not only audio but also visual signals. With the help of variable resistors R1, R2 their frequency change in the range of 40 to 200 cycles / min. which corresponds to the musical pace from “grave” to “Prestissimo”.
A master oscillator is executed on a different structure of the two transistors V1, V2, V3 amplifier stage, operating in key mode at a dynamic head B1. Light signals generates the standby multivibrator V4, V5, which then increases the SIC transistors V6, V7.
All transistors, except for V7, silicon, low-power V7 should be of medium power, such as КТ603.
Recommend to read
TERRIBLE, BUT NOT THE SHOOTER
These missiles were never used in combat. Nevertheless, they played a significant role in the balance of power between opposing blocs during the "cold war". The work done in NII-88 in...
THE AIRCRAFT, F-3
In our city of Kingisepp were gliding club ROSTO, which I have since 1996 worked as a flight instructor. Of aircraft in the club were two light aircraft, four airframe. But they were not...
