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 [...]
In this article, an RC oscillator is used as a baud rate generator. If you can calibrate the frequency of such a circuit sufficiently accurately (within a few percent) using a frequency meter, it will work very well. However, it may well drift a bit after some time, and then…. Consequently, here we present a [...]
If a transistor junction operating in Zener breakdown is used as a noise source, the amplitude of the noise signal is asymmetric. This problem can be solved by using two transistors as two independent noise sources. One of these has a series resistor to earth, and the other has a series resistor to the supply [...]
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