Circuit Project Electronic

This circuit uses the integrated circuit CMOS number IC 4011 pretend Square Wave Oscillator , which touch buffer change output (which compose Complementary pair of transistors) for a loudspeaker next by bass keen in the sound can control with potentiometer or [...]

The IC is ideal for detecting the presence, absence or level of water or other conducting liquids. A detector determines the presence or absence of fluid by comparing the resistance of the fluid with the IC’s internal reference resistance. An AC signal is used to prevent plating of the probe. When the probe resistance increases [...]

This is Simple Tone Oscillator Generator. It is use transistor 2N2222 and 2N2907 be main part. By control tone sound with R2 - 50K and use 8ohm size. Detail other loudspeakers have a few , request friends see in the circuit please yes.
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