NE 555 circuit water level alarm
Here is a simple water-level alarm that will produce an audible alarm when the water level reaches a preset level.The circuit can be powered from a 3V battery and is very useful to use.The circuit is based in an astable multivibrator active on IC1 (NE 555). The abundance of the astable multivibrator today will depend on capacitor C1, resistors R1, R2 and friction in addition to probes & b. When
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