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Most water-level indicators for water tanks are based upon the number of LEDs that glow to indicate the corresponding level of water in the container. Here we present a digital version of the water-level indicator.   ... Read more »
Category: Sensor | Views: 1992

The circuit uses a 555 timer wired as an astable oscillator and powered by the emitter current of the BC109C. ... Read more »

Category: Sensor | Views: 819


This circuit uses an MC2830 to form a voice activated switch ( VOX ).  ... Read more »
Category: Sensor | Views: 1481

One LED monitors three levels: 50, 70 & 85 dB. Usefull to detect too noisy environments.  ... Read more »
Category: Sensor | Views: 832

Remote sensor sends data via mains supply. Temperature range: 00.0 to 99.9 °C  ... Read more »
Category: Sensor | Views: 1133

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