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Password Lock Circuit Using IC 4017

Last Updated on January 5, 2022 by Swagatam 27 Comments

4017 based password lock circuit

In this post I will show how to construct a general purpose password based electronic lock circuit without any involvement of microcontroller. You can use this circuit for numerous applications where a basic level of security is required for turning a circuit ON. The proposed project is built using an IC 4017 and the circuit […]

Filed Under: Security and Alarm Tagged With: 4017, Lock, Password

Simple IC 4017 Circuits

Last Updated on January 27, 2023 by Swagatam 30 Comments

4017 IC image compressed

The IC 4017 is a versatile counter divider IC which can be applied for making many different interesting electronic circuits. In this post I have explained about a few useful yet simple 4017 IC circuits and projects, assorted and compiled from this blog. How to Understand IC 4017 Pinouts Before we delve into the many […]

Filed Under: Mini Projects Tagged With: 4017, Circuits, Simple

How to Understand IC 4017 Pinouts

Last Updated on February 17, 2022 by Swagatam 235 Comments

The IC 4017 can be considered as one of the most useful and versatile chip having numerous electronic circuit applications. About IC 4017 Technically it is called the Johnsons 10 stage decade counter divider. The name suggest two things, it’s something to do with number 10 and counting/dividing. The number 10 is connected with the […]

Filed Under: Electronics Theory Tagged With: 4017, Pinouts, Understand

Impact Collision Switch Sensor Module and Circuit Diagram

Last Updated on April 28, 2025 by Swagatam Leave a Comment

Here we are going to learn about a very interesting small sensor called the Impact Collision Switch Sensor Module. This module is super simple but very useful especially when we want to detect a shock, collision, hit or a sudden tap on a surface. Now let us go step-by-step to understand everything about it. What […]

Filed Under: Security and Alarm, Sensors and Detectors Tagged With: Collision, Impact, Module, Sensor, Switch

LED Light Wave Effect Generator Circuit

Last Updated on December 31, 2023 by Swagatam 6 Comments

LED light wave generator circuit

In this post I have explained a simple LED light wave effect generator circuit which will sequentially create a difference in brightness over a chain of LEDs, creating a chasing light wave kind of visual effect.

Filed Under: Lamps and Lights Tagged With: Effect, Generator, LED, Light, Wave

Ding Dong Bell Circuit that Saves Electricity

Last Updated on January 1, 2024 by Swagatam Leave a Comment

ding dong bell circuit

This circuit goes beyond being a simple two-tone doorbell. Instead, it utilizes envelope modulation to produce an authentic ‘ding-dong’ chime sound. Additionally, it incorporates a power-saving feature, consuming zero power in standby mode. Circuit Diagram How the Circuit Works When SW1 is pressed, it triggers Q1 to power the remaining circuitry. IC1a serves as a […]

Filed Under: Audio and Amplifier Projects Tagged With: Bell, Ding, Dong, Electricity, Saves

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