• Skip to main content
  • Skip to primary sidebar

Homemade Circuit Projects

Get free circuit help 24/7

New Projects | Privacy Policy | About us | Contact | Disclaimer | Copyright | Videos 

You are here: Home / Mini Projects / Simple Clap Operated Stairway Light Switch Circuit

Simple Clap Operated Stairway Light Switch Circuit

Last Updated on October 19, 2019 by Swagatam 5 Comments

In this write up we will discuss how to make a simple clap operated stairway light switch circuit for enabling a brief switch ON of the lights while the user crosses the lane, and thus save electricity.

Introduction

Stairways, corridors or small indoor passages often tend to be dark throughout the day irrespective of the outdoor ambient light conditions. Therefore keeping such passages illuminated all the the time becomes imperative, however this leads to unnecessary wastage of electricity.

An innovative way of solving this problem has been discussed in this article, by employing a clap operated momentary light switch circuit.

The circuit diagram may be understood as follows:

How the Circuit Work

The idea is to switch ON the connected lights in the corridor through a clap sound, whenever the involved passage is utilized.

The clap sound triggers the circuit and keeps the connected lights switched ON for a few seconds or until the predetermined time is lapsed, after which the lights are automatically switched OFF.

The configuration is actually a transistor based clap switch, but without a flip flop stage, rather the flip flop is replaced by a delay OFF timer stage for the necessary switching and sustaining of the lights for a fixed predetermined period.

The stage as usual includes a sound sensor stage consisting of a mic and the subsequent transistor amplifier stage using a couple BC547 transistors.

The next stage consists of the PNP transistor BC557 which receives the signals amplified from the first stage via the 47uF capacitor.

The fed signals are further amplified to much greater levels for triggering the final LED driver stage.

The LED driver stage consists of a group of white LEDs which provides enough light for illuminating a small passage premise.

The two 39K resistors and the 220uF capacitors form the basic delay OFF timer and decides for how many seconds the driver stage remains ON with the LEDs lit.

The power to the circuit can be either applied by incorporating a standard transformer/bridge AC/DC adapter or if the circuit needs to be more compact, a transformerless power supply may be included with the below shown circuit.

All the NPN transistors are BC547B and the single PNP transistor is a BC557B, LEDs are ordinary 5mm high efficiency white LEDs.

The coil can be of any type, a 100mH choke will also do, it's introduced in order to keep the circuit stable and for avoiding self oscillations.

Circuit Diagram

caution electricity can be dangerous

Another Clap operated Stairway Switch Circuit

Here's another simpler design that you can try for the proposed clap operated staircase lighting system. It's a tested design and is more accurate and easier to build than the previous circuit.

You'll also like:

  • 1.  7 Simple Inverter Circuits you can Build at Home
  • 2.  3 Best Joule Thief Circuits
  • 3.  How to Select MOV – Explained with a Practical Design
  • 4.  How to Make a 25 Amp, 1500 watts Heater Controller Circuit
  • 5.  Heater Controller Circuit Using Push-Buttons
  • 6.  9 Simple Solar Battery Charger Circuits

About Swagatam

I am an electronic engineer (dipIETE ), hobbyist, inventor, schematic/PCB designer, manufacturer. I am also the founder of the website: https://www.homemade-circuits.com/, where I love sharing my innovative circuit ideas and tutorials.
If you have any circuit related query, you may interact through comments, I'll be most happy to help!

Have Questions? Please Comment below to Solve your Queries! Comments must be Related to the above Topic!!

Subscribe
Notify of
5 Comments
Newest
Oldest
Inline Feedbacks
View all comments


Primary Sidebar

Categories

  • 3-Phase Power (15)
  • 324 IC Circuits (19)
  • 4017 IC Circuits (52)
  • 4060 IC Circuits (26)
  • 555 IC Circuits (99)
  • 741 IC Circuits (20)
  • Arduino Engineering Projects (83)
  • Audio and Amplifier Projects (118)
  • Battery Chargers (83)
  • Car and Motorcycle (96)
  • Datasheets (77)
  • Decorative Lighting (Diwali, Christmas) (33)
  • Electronic Components (101)
  • Electronic Devices and Circuit Theory (36)
  • Electronics Tutorial (120)
  • Fish Aquarium (5)
  • Free Energy (34)
  • Fun Projects (14)
  • GSM Projects (9)
  • Health Related (20)
  • Heater Controllers (30)
  • Home Electrical Circuits (106)
  • How to Articles (20)
  • Incubator Related (6)
  • Industrial Electronics (28)
  • Infrared (IR) (40)
  • Inverter Circuits (98)
  • Laser Projects (12)
  • LED and Light Effect (95)
  • LM317/LM338 (21)
  • LM3915 IC (25)
  • Meters and Testers (67)
  • Mini Projects (152)
  • Motor Controller (67)
  • MPPT (7)
  • Oscillator Circuits (25)
  • PIR (Passive Infrared) (8)
  • Power Electronics (35)
  • Power Supply Circuits (81)
  • Radio Circuits (10)
  • Remote Control (48)
  • Security and Alarm (64)
  • Sensors and Detectors (127)
  • SG3525 IC (5)
  • Simple Circuits (75)
  • SMPS (29)
  • Solar Controllers (62)
  • Timer and Delay Relay (54)
  • TL494 IC (5)
  • Transformerless Power Supply (8)
  • Transmitter Circuits (41)
  • Ultrasonic Projects (16)
  • Water Level Controller (45)

Calculators

  • AWG to Millimeter Converter
  • Battery Back up Time Calculator
  • Capacitance Reactance Calculator
  • IC 555 Astable Calculator
  • IC 555 Monostable Calculator
  • Inductance Calculator
  • LC Resonance Calculator
  • LM317, LM338, LM396 Calculator
  • Ohm’s Law Calculator
  • Phase Angle Phase Shift Calculator
  • Power Factor (PF) Calculator
  • Reactance Calculator
  • Small Signal Transistor(BJT) and Diode Quick Datasheet
  • Transistor Astable Calculator
  • Transistor base Resistor Calculator
  • Voltage Divider Calculator
  • Wire Current Calculator
  • Zener Diode Calculator

© 2023 · Swagatam Innovations

wpDiscuz