This is the Melody and Music tone generator circuit which I think is useful for adding color in the electronic work is good, Can be applied to sound an alarm, or assembly electronic projects very well. Examples circuit that I suggest, is a switch for adjusting the sound more, it is not boring, these circuits are suitable for the toys in time for the children, or parents who want to add electronics skills to children.
Western music using ic HT82207
Sounds that you heard in the movie, which is fighting the cowboy, the gun sounds, sound horse this cycle is to be born.Because the IC has already been programmed to be easy to use.
Principle of the circuit is.When the circuit to the power supply. Then try pressing the switch S1 will allow the production of IC1 frequency out of pin 17.
In addition to Q1 amplifier IC1 is often the birth up to the control stick – off of LED1, LED2. The R1, R2 are connected to eliminate the current flowing through LED 2 and the C1 and C2 are responsible for filtering unwanted noise away. In addition, VR1 can also determine the speed of sound heard.
Melody Generator with UM3491
Operation of the circuit IC1 No. UM3491 structures within the memory ROM are then became the sound And the chorus. Memory controller is a 10 bit scale code is set to a music major and 5 bit control scale code which sets the second chorus.
The R1 is connected to the pin 11 and pin 12 to determine the origin frequency oscillator frequency of 64 Hz rhythm and melody sound. Signals that are sent to the Circuit Envelop by the legs 12, 14 are C1, C2 is connected with the signal from the circuit Envelop will come out of stand 13 by C3 is coupling signal before entering the leg 15 to modulate circuit as a signal audio output to pin 17 which is connected to Q1 which acts amplifier if the press switch S1 will make IC1 to play a song and then stop if the press switch S1 also a time IC1 will play the next song and then stop the S2-S4. determines the nature of the music to be played.
Animal sound generator using ic HT82231
This is an animal origin, a simple circuit. Interesting, because an IC package and a simple good
Operation of the circuit. This circuit, an IC, a number HT82231 IC package that has other audio source animals. The origin of the sound depends on the switch S1-S8 of switch.
Each is a different animal sounds and choose to press each LED1, LED2 lights alternately as it sounds they hear. The R1, R2 LED forward current limiting for each signal will come out on pin 19, to expand the force with Q1. There is also a sound that VR1 can be adjusted as soon as we hear. Or slow as you like C1, C2 prevents low-frequency noise. And high frequencies.