Compares with sound level tool

A tool that use for fine to decorate the sound of , organ , piano , have the pitch is equal. By have the accuracy is similar to with compare with the sound of the professional. But use the ability in listenning sound beat. At happen between 2 frequency sounds that confute by use origin frequency pillar circuit in 250.830 kHz frequency occurrences. For feed to reach first part of 5 IC. Which build the circuit divides by the frequency model a program.

Sound Meter easy testing by IC LM324
The circuit below responds to sound pressure levels from about 60 to 70 dB. The sound is picked up by an 8 ohm speaker, amplified by a transistor stage and one LM324 op-amp section. You can also ...
Simple LED light based music using LM318
This is a simple circuit. Music can change the LED light level gamut. Operation of this circuit is a circuit op amp IC1 / 1-IC1 / 5 compared to the characteristics of the circuit voltage.It h ...
Sound Source Locator Uses PreChamp
This circuit could be regarded as a simple alternative to the Sooper Snooper device featured elsewhere in this issue. It is based on the PreChamp preamplifier featured in the July 1994 issue o ...
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 audi ...
4 Level - voltage Detector by LM339
This circuit can sequentially indicate 4 separate voltage levels. The voltages are determined by the values of resistors R1 through R5 arranged in a simple voltage divider circuit. Sour ...