Thread Relief and Chamfers | Relief, Thread, Materials engineering
A siren is a loud and a typical sound making device. It is used to alert the persons and to attract the moment various vehicles mounted with sirens used, for example, VIP's, and in vehicles such as ambulances, police cars and fire trucks. This circuit is used to generate a police siren sound using a Simple NE555 timer and a speaker. The NE555 timer IC is the popular chip due to its multi-functionality and which finds use in a wide range of applications ranging from industrial, critical power electronics areas and much more. The flexibility of this NE555 timer IC is that it has a wide range of operating voltage from +5 volt DC to +18 volt DC and it can sink or source 200mA of load current. The 555 timer pin diagram and DIP are shown below. NE555 Timer DIP and Pin Configuration Pin Functionality of IC NE555 Timer as tabulated below. Pin No. Pin name Input/Output Function 1 GND Input Provides ground 2 Trigger Input Trigger comparator input pin. Negative trigger (< 1/3 Vcc) is given in monostable operation 3 Output Output Its output pin 4 Reset Input Internal flip-flop reset pin.
Alguine me puede decir donde puedo descargar el libro completo de "El Feo" de carlos cuauhtemoc sanchez... o si alguine lo tiene que me lo pueda enviar a mi correo... porfavor.. porfas:D