Tuesday, June 21, 2016

Simple Circuit Diagram Basement Flood Alarm using NE555 IC

Robotronicdiagram. - This is one of the application of NE555 IC for simple circuit diagram of basement flood alarm like in Figure 1. below. The main component that used in this circuit diagram is NE555 IC. 

Circuit Diagram 

Component Part


R1, R2, R3 = 1K ¼ w
R4 = 18K ¼ w
R5 = 180K ¼ w
P1 = 1M


C1, C2 = 1uF/25v
C3 = 10nF
C4 = 10uF/25v


IC1 = NE555
D1 = 1N4148
T1, T2 = BC547
LED1 = Red/10mA


BAT = 9V PP3 Battery

BZ1 = 5V Piezo-Sounder


Circuit diagram like in figure 1 above is Simple Circuit Diagram Basement Flood Alarm using NE555 IC. According Electroschematics site describe that even though floods don’t always rate high on our list of concerns, if we get an early warning about one, we should take steps to help prevent as much damage as possible, including dangerous substances within the floodwaters that could enter our homes. The circuit of the basement flood alarm introduced below is designed to sound off like an alert signal generator when water gets where it doesn’t belong. Power by a compact battery, this alarm will provide an early alert that can help you ward off a damaging flood in your basement or crawl space. The circuit works on the simple, sound, and extensively proven principle of electrical circuits. The flood alarm has an aqua-sensor with two sensor probes. When the sensor probes make contact with water, the water completes the electrical circuit, which allows an alarm to sound.

The entire circuit can be created on a medium-sized perfboard. The electronics and battery should be housed in a small prototype enclosure (made waterproof using epoxy adhesive). However, for mechanical reasons and to simplify construction, the aqua-sensor (formed from two stainless steel nails protruding through the case) should be kept at a distance from the electronics (see author’s prototype). The finished system can be wall-mounted at ground height or at a suitable height above ground as per individual need.

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