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Category: Security Circuits / Alarm Circuits Views: 3604 Rank: 0 This circuit not only indicates the amount of water present in the overhead tank but also gives an alarm when the tank is full. The circuit uses the widely available CD4066, bilateral switch CMOS IC to indicate the water level through LEDs. When the water is empty the wires in the tank are open circuited and the 180K resistors pulls the switch low hence opening the switch and LEDs are OFF. As the water starts filling up, first the wire in the tank connected to S1 and the + supply are shorted by water. visit page.
Related circuits This alarm features open- and closed-loop detector and automatic alarm shutoff. Offers 15 second exit/entrance delay 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. The idea behind this snore alarm, is just to rouse the snorer, not the entire household. To wake the sleeper, vibration is used, not an audible alert. The vibration is provided by a small motor housed in a small 35mm film case, which can be placed under the sleepers mattress or pillow. This... This house alarm circuit has open and closed loop sensor and has self shutdown function. The delay after trigering can be adjusted from 1 minute to 12. The delay before trigering is 13 seconds. Offcourse all this timmings can be change with litle changes to few passive parts. A single zone alarm circuit with entry and exit delay and other facilities. The circuit features automatic exit and entry delays, timed bell cut-off and system reset. It has provision for normally open and normally closed switches and will suit the usual input devices (Pressure Mats, Magnetic... The burglar chaser makes a great accessory for any alarm system. It creates brilliant flashes of white light and a loud, irritating sound from a metal horn buzzer. Transformer T1 is connected to Ql, Rl, and R2 to form a blocking oscillator. This creates a 6-Vac signal on the primary of Tl.... Circuit turns on when light (sunlight) strikes photocell. Potentiometer R sets light level at which the alarm sounds Oscillating output improves system security Many electronic-control systems have digital outputs that use transistors. One method of improving the security in these outputs is to use an oscillating signal to represent a logic-high state instead of a fixed voltage level (Figure 1). This type of signal, a dynamic variable, can drive the...
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Basic Circuits. Simple LDR Light Sensor · Simple LDR Dark Sensor · Clock Pulse Generator · NE 555 Astable Multi-Vibrator · Water Level Indicator. Projects. Touch Sensitive Alarm · Rain Alarm · 12 Hour Digital Clock ...
Circuit of 89C2051 Microcontroller Based Water Level Indicator with Voice Alarm. Features of this Project. Speaks in Hindi language. When Tank is full, it speaks "Tanki Bhar gaye" and repeats after every 5 beeps. When Tank ...
This electronic circuit is a simple water level indicator alarm that is based on few transistors . The circuit is very simple and it has a very low current consumption , so you can use a 9 volts battery to powering this water level indicator alarm .
Water Level Indicator With Alarm ... This circuit produces alarm when water level is below the lowest level L1 and also when water just touches the highest level L12. The circuit is designed to display 12 different levels.
It is called the Water Level Indicator. Nowadays ... Raikut, and Shouvit, How would you be able to switch the circuit up so that the light goes on and the alarm sounds when the water is not present? sidd889 says: May 3, 2013.
Here's a SIMPLE WATER LEVEL INDICATOR CIRCUIT. It is best suited for overhead water tanks to display the amount of water. The circuit consisting of 3 LED's used to indicate minimum, medium and maximum levels.
Make a Water Level Indicator at Home ( Hindi / Urdu )
Automatic Water Level Controller With Error Indicator Project Circuit
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