Near the Festival of Happiness.Christmas and New Year’s Day. My son was thrilled with the gift of friends in the village.Music Box circuit is a scientific inventions that he wanted made because he thought it would impress the recipient. And it is easy made electronic projects. Cheap as well. I suggest three circuits, which featured various By the application of each person.
1.Music Box Versatile Using IC-M3481
This is a multi-purpose integrated music box that interesting, because an IC package. Is a simple and affordable.
The main function of the circuit is the device of the circuit is IC1. This is a sound generator IC. The Christmas season. Its musical all 8 music. When the power supply LDR1 the exposure will cause voltage drop across R1 is enough to make IC1 work has output to stimulate pin 11 and pin 12 to stimulate pin B of Q1. Q2 and the current expansion drive that will be the speaker.
While the circuit work if the switch S1 connected to the unique music tracks and so on, but if S1 is not connected. Circuit will play all the songs. If the switch S2 connected to the cycle When there is no light will stop play immediately. But if the switch S2 is not connected to music and no light will not stop until the song is finished playing.
Switch S3 is responsible for selecting music on, press 1 once one moves to music. The VR1 is also a tone control if VR1 is less resistance will be reduced to a lower tone. And the music will slow down play with. The R6, C3 is responsible for smooth sound more R7 forward to control the feedback stability of dc output of the circuit.
2. Music Box Automatically Circuit using IC UM66T
This is an integrated music box Self Promotion Nat, when I open the music box to hear the music out. You can choose music in several voices, just change the IC number only.
Operation of the circuit is when the power supply and switch S1. The IC IC1 is dozen, it will count clock is rising edge. It has output out to pins 3, the circuit will be designed to be integrated from 3. By, if switch S1 No. 1, will be output from the pin 3. If the switch S1 No. 2 is the output out to pin 2. If the switch S1 No. 3 will be output from the pin 4. and if the switch S1 No. 4 is the output from the pin 7, the pin 15 at a pin reset is output out to pin 3 instead of the output of IC1 is connected to IC2.
Which acts as a switch, electronics, the signal output of IC1 to pins control the switch of IC2, too, if you can get input from pin 3 of IC1 incoming pin 5 of IC2 to the pin 3, where the power 5V connection. to Pin 4 connected to pin 2 of the IC3., a sound generator IC. The output will come out in three pins and was taken to expand the Q1, C2, R1, C3, C4, C5 serves to filter noise ground. IC2 is the operation of the switch contact IC3-IC5 to select music Controlling the sequence of switch S1.
3. Music Box Daylight using UM66T
Operation of the circuit.While turning the switch to position 1.Sound generator circuit will come out all the time because the program IC1 is already out.
When a current flows into the VCC. Will be output at pin 3 to Q2.To the speaker drivers. If the slide switches to the position 2.This circuit will work as light LDR1 be, if not LDR1 light will be much resistance.The Q1 does not work, there is no current to flow IC1.It makes up a sound signal, through R2 to extend the Q2 to drive speakers.
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