Este circuito es de una sirena con modulación manual que, en lugar de excitar un altavoz, excita buzzers piezoeléctricos de alto rendimiento o incluso tweeters piezoeléctricos (sin el transformador interno). La utilización de un transformador permite obtener una señal de tensión elevada capaz de proporcionar mucho mayor rendimiento para los transductores indicados. El transformador tiene devanado primario de 110/220 V y secundario de 6 + 6 V, con corrientes de 100 a 250 mA. El ajuste del efecto se obtiene en el trimpot de 100 k ohms. Cuando presionamos S1 el capacitor C1 se carga, lo que lleva al oscilador a entrar en funcionamiento con la producción de un sonido cada vez más agudo. Cuando suelta S1 el capacitor se descarga y el sonido se vuelve cada vez más grave hasta que se detenga completamente. Los capacitor C1 y C2 son electrolíticos para tensiones un poco mayores que las usadas en la alimentación, y C3 y pueden ser tanto p de poliéster como cerámico. El valor de C3 se puede cambiar en el rango de 22 nF a 220 nF para encontrar el que proporcione un rango de variaciones coincidente con el que el transductor utilizado tenga un máximo rendimiento.

 


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18.842MBMemory Usage38.72msRequest Duration
Joomla! Version5.2.3
PHP Version8.3.20
Identityguest
Response200
Templatecassiopeia
Database
Server
mysql
Version
10.5.22-MariaDB
Collation
latin1_swedish_ci
Conn Collation
utf8mb4_general_ci
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