Author: Manikandan KJ ©KJMIndia Automatic water level controllers regulate the water supply for a given reservoir/tank to maintain a minimum water level. This water level controller circuit uses a float switch to control the water level of the storage tank. It is an automatic system, so it will start to fill up when the height of the water goes below …
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Author: Manikandan KJ ©kjmindia.in Here is another audio annunciator used in factories, industries, hospitals, auditoriums, theatres, etc. to indicate the power failure and resumption. The circuit will give a long beep on power resumption and an intermittent beep when power fails. The power failure alarm circuit that I posted earlier will activate the alarm (continuous tone) only for a few …
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A timer circuit is used to generate an output pulse after a given period of time. This time can be in the order of seconds or minutes. The length of the output pulse can be varied by changing the frequency at which the clock signal is applied to the timer’s input pin. Time interval can be measured in seconds, minutes, …
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Author: Manikandan K J This circuit produces an audible alarm when the water level in a rain or water tank rises above a preset level and overflows. It will sound an alarm whenever the water level reaches the top position in the overhead tank, thus it alerts one to turn off the motor to prevent water wastage. The purpose of …
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A semi-automatic water level controller circuit is used for automatically controlling the level of water in a tank and avoid overflowing. This circuit is made up of a sensor, timer chip, relay, pump driver and power supply. The sensor senses the water level in the tank and converts it to voltage. The timer chip takes care of sensing voltage from sensor …
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Author: Manikandan K J This is a very simple circuit built using only a few components to detect ac mains power failure and its resumption. The heart of the circuit is the most popular timer Ic 555 which is wired as monostable multivibrator. Battery, Diode D1, D2, Led L2 and resistor R2 are wired in such a way that the …
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Author: Manikandan K J This is a simple 20 led chaser circuit built using the decade counter ic CD4017 and Dual flip flop ic CD4013. CD4017 is wired as divide by 10 counter. One flip-flop of CD4013 is wired as multivibrator and another flip flop is wired as divide by 2 counter. Output pin 2 from CD4013 is connected to …
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Automatic Water Level Controller Circuit Diagram Using 555 timer Ic For Overhead TankHere is a simple water level controller using the 555 timer ic which will monitor the overhead tank. It will automatically switch on the motor when the level of water falls below the predetermined bottom level and switches off the motor when it reaches the preset top level.The …
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Pаrtѕ Used:IC:U1 – 555 Tіmеr Rеѕіѕtоrѕ (All 1/4 Watts):R1 – 22KR2 – 8.2KR3 – 470E Cарасіtоr:C1 – 0.001(сеrаmіс disc) Dіоdе:D1 – 6v, 500mW (Zener) LED – Any соlоr12V BаttеrуGeneral Purpose PCB Cіrсuіt Dеѕсrірtіоn: The average сurrеnt drаіn іѕ 1mA оr lеѕѕ duе tо thе low dutу сусlе оf thе flаѕhіng LED. Thе timer іс 555 wіll trіggеr the LED on when …
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Authоr: Prаdеер G Source:EFY Thіѕ project саn еffесtіvеlу be used as a tеmреrаturе-ѕеnѕіng fіrе alarm. Here, an NTC thеrmіѕtоr іѕ used аѕ the temperature ѕеnѕоr. Rеѕіѕtаnсе of thе NTC thеrmіѕtоr dесrеаѕеѕ wіth аn іnсrеаѕе in temperature. Parts Lіѕt: Semiconductors:IC1,IC2-NE555 TImеrT1-BC547 NPN TrаnѕіѕtоrLED1-5mm Rеѕіѕtоrѕ(1/4w,+/-саrbоn):R1- 22KR2- 4.7KR3,R6- 1KR4,R7- 56KR5- 680ER8- 10EVR1- 100K Pot Capacitors:C1,C6- 100uF,25VC2- 2.2uF,25VC3,C5- 0.01uF,сеrаmіс discC4- 0.047uF, сеrаmіс disc …
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