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
RESONATORY CLIMBS
Today I want to introduce You to the model class B1, having almost the same set of wings. This force diagram consoles with a transverse set of pine slats is fully justified, since for...
TABLE-“CENTIMETER”
Many of the works performed on the bench — not the table — associated with the need to check the dimensions. But in many cases far more convenient to do without these devices, it is only...
