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Simple Delay Timer Circuits Explained

Last Updated on January 2, 2024 by Swagatam 677 Comments

In this post I have explained the making of simple delay timers using very ordinary components like transistors, capacitors and diodes. All these circuits will produce delay ON or delay OFF time intervals at the output for a predetermined period, from a few seconds to many minutes. All the designs are fully adjustable. Importance of […]

Filed Under: Timer and Delay Relay Tagged With: Circuits, Delay, Explained, Simple, Timer

Simple Water Level Indicator Circuits (with Images)

Last Updated on January 8, 2024 by Swagatam 99 Comments

IC 4049 pinout diagram

A water level indicator is an electronic circuit which indicates the various levels of water inside a tank. This happens when rising or dropping water levels come in contact with the respective water sensors arranged step wise inside the water tank at different depths. In this post I have explained 2 interesting ways to make […]

Filed Under: Indicator Circuits, Water Controller Tagged With: Circuits, Images, Indicator, Level, Simple, Water

Cheap Semi Automatic, Tank Water Over Flow Controller Circuit

Last Updated on March 13, 2019 by Swagatam 75 Comments

simple water level controller circuit

The circuit presented here monitors the level of the water rising inside a tank and automatically switches OFF the pump motor as soon as the water level reaches the brim of the tank. The proposed tank water overflow controller circuit is a semi automatic device because it can only sense an overfill and switch OFF […]

Filed Under: Water Controller Tagged With: Automatic, Cheap, Over, Semi, Tank, Water

Timer based Water Level Controller Circuit

Last Updated on February 17, 2021 by Swagatam 56 Comments

CD 4060 based timer 9be8549fa77bb7793263 1 1

The explained circuit of a water level controller circuit is based on a adjustable timer circuit whose time delay is first adjusted to match the filling time of the tank, as the the tank fills, the timer delay also simultaneously lapses and its output switches OFF the water pump. Circuit Specifications Actually the circuit was […]

Filed Under: Water Controller Tagged With: Based, Controller, Level, Timer, Water

AC Light Dimmer Circuit

Last Updated on January 18, 2024 by Swagatam 334 Comments

In this post I have explained through two examples how to build a simple110 V or 220 V AC light dimmer circuit for controlling light intensity with pot, using the principle of triac phase chopping. A 220V dimmer switch circuit is basically a triac/diac based AC mains voltage regulator circuit which can be used for […]

Filed Under: Lamps and Lights Tagged With: AC, Dimmer, Light

BEL188 Transistor – Specification and Datasheet

Last Updated on January 1, 2020 by Swagatam 3 Comments

188transistordatasheet

The transistor 188 is one of my favorites, simply because even being so tiny it’s able to handle currents as high as 1 Amp. Understanding BEL188 Transistor Specification/Datasheet The transistor BEL188 is a general purpose transistor, and due to its wide voltage and current rating can be used for almost all small to medium power […]

Filed Under: Datasheets and Components Tagged With: BEL188, Datasheet, Specification, Transistor

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