Simple Electronic Circuits Kitszone.com

  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 …

  Author: T.K Hareendran Portable toilets, which are self-contained and can be installed almost anywhere, are more costly than permanent outdoor toilets but offer numerous key advantages. Today, portable toilets are often encountered in outdoor settings such as construction sites, farms, campgrounds, and even streets. Solar energy is well suited for situations where illumination is needed in portable toilets that …

Author: Fayaz Hassan  When the battery reaches the maximum charging voltage defined by the circuit, most battery chargers cease charging it. This 12V battery charger circuit charges the battery at a certain voltage, known as absorption voltage, and after the maximum charging voltage is reached, the charger switches to float voltage to keep the battery at that voltage. The kind of …

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 …

   Author: Manikandan K J  Circuit Sponsor: kjmindia.in Water level controller is necessary for many reasons. Water level can be monitored and controlled automatically without any human intervention. Thus, it saves water wastage, electricity and time. This can be used both in industries and houses. The circuit I am going to share in this post controls water level in the overhead …

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, …

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 …

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 …

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 …

Voltage fluctuations and power cuts adversely affect various electrical appliances such as Tv, music system, refrigerator, etc. Here is a simple and inexpensive circuit using opamp Lm358 to disconnect the equipment during high and low voltage. We can also use LM324 to design this circuit by using only the two op amps out of the four. We can also design …

SENSOR 1 – F(L) – Used for water flow sensing 2 – +ve supply – Used for water flow sensing 3 – +ve supply – Kept inside the tank but should not touch the bottom of the tank. 4 – First Level 5 – Second Level 6 – Third Level 7 – Fourth Level 8 – Top Level Both 1 …

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 …

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 …

Battery Level Indicator Circuit Using Dual Op Amp Ic LM358 To Monitor 12V Battery’s full, normal and low level.                                     Pаrtѕ Uѕеd: Rеѕіѕtоrѕ: (1/4 Wаttѕ)R1 – 10KR2 – 10KR3 – 10K (рrеѕеt)R4 – 10K (рrеѕеt)R5 – 1.5KR6 – 1.5KR7 – 1KR8 – 1.5KR9 – 1.5K …

The Lеаd-асіd bаttеrу іѕ perhaps thе mоѕt wіdеlу uѕеd tуре оf  rесhаrgеаblе bаttеrу.Thіѕ is bесаuѕе оf іtѕ соѕt еffесtіvеnеѕѕ and іtѕ сарасіtу tо deliver vеrу hіgh currents аѕ іt hаѕ аn еxtrеmеlу lowinternal rеѕіѕtаnсе.Lеаd-асіd batteries should bе сhаrgеd uѕіng current lіmіtеd voltage regulator circuit,whereas Ni-cd bаttеrіеѕ ѕhоuld bе сhаrgеd аt constant сurrеnt. Here іѕ a circuit whісh саncharge a 6V,4.5AH …