Water Level Alarm by 4011 A circuit that offers visual indication of fluid level in a vessel, with a switchable audible alarm. Example uses would be to monitor the level of water in a bath or cold storage tank.
This circuit will trigger with any fluid with a resistance under 900K between the maximum separation distance of the probes. Let me explain further. The circuit uses a 4050B CMOS hex buffer working on a 5 volt supply…..

Water Sensor Alarm Diagram. Monday, February 21st, 2011 … a LED) when the water contained into a recipient has reached the desired level. …

Water Alarm Circuit Diagram Have you ever seen the stairs to one of the upper stories in your house turn into a waterfall? Or maybe you’ve come home to find your aquarium fish trying to swim across the carpet? For your sake, we hope not, because the consequences are usually fairly dramatic…..

Rain Alarm using NE555 This circuit gives out an alarm when its sensor is wetted by water. A 555 astable multivibrator is used here which gives a tone of about 1kHz upon detecting water. The sensor when wetted by water completes the circuit and makes the 555 oscillate at about 1kHz….

Water Alarm with LM380 This be Water Alarm circuit ,model to be simple. When sensor point touch the water. It is make the circuit works to have a voice warn hear. By the circuit composes the equipment is important be integrated number circuit LM380. It usual perform amplify….

Water Activated Alarm by IC 555 The circuit uses a 555 timer wired as an astable oscillator and powered by the emitter current of the BC109C. Under dry conditions, the transistor will have no bias current and be fully off. As the probes get wet, a small current flows between base and emitter and the transistor switches on….

Water Sensor Alarm Kit So the sump pump quits and because you dont live in your basement youre never the wiser. The result? A flooded basement! Now build a cute little water sensor alarm to let you know! Simply mount the alarm in the area you want to sense water and the moment it touches….