555 Timer Circuits - Electronic Hobby Projects for Beginners

Wailing Siren using 555 Timer – Hobby Project

Aman Deep — Thu, 21 Dec 2017 07:48:00 +0000

Today we shall talk about a really amazing circuit that produces a sound of a siren. There are different types of circuits that produce different kinds of sounds. Here is a simple circuit that produces wailing siren. The main principle of this circuit is to produce a wailing siren. The 555 timer IC is operated in […]

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Mobile Phone Detector Circuit

Aman Deep — Sun, 16 Jul 2017 06:44:55 +0000

This is a very interesting hobby project which can detect active mobile phone or GSM communication in its proximity. Active mobile phone means there is some live communication is going on like calls, sms sending or receiving etc. This circuit can be used to prevent unauthorized use of mobile phones in examination halls, conference rooms […]

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LED Chaser using 4017 Counter and 555 Timer

Ligo George — Sun, 25 Sep 2016 07:06:01 +0000

Introduction A simple LED chaser hobby circuit can be made using 555 timer and CD4017 counter IC. You can use this circuit for decorative purposes. By modifying the circuit in a proper way, you can even use this to control lights working on AC mains. Components Required CD4017 Counter IC – 1 555 Timer IC – […]

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Rain Alarm using 555 Timer

Ligo George — Sun, 26 Jun 2016 10:56:28 +0000

Here is a simple and interesting hobby circuit that can be made using the popular 555 timer IC. As you might already know, a 555 Timer can be easily wired as Astable, Monostable or Bistable multivibrator. This circuit can be used as rain sensor, water overflow sensor or as a water level sensor. This circuit make […]

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Simple Electronic Piano using 555 Timer

Ligo George — Sat, 30 Jan 2016 06:15:54 +0000

A simple electronic toy piano can be easily constructed using the popular 555 timer IC. 555 Timer can be easily wired as Astable, Monostable or Bistable multivibrator. We all know that Sound is a Mechanical Wave as it is produced by to and fro movement of particles of the medium. Displacement of particles are in […]

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Bistable Multivibrator using 555 Timer

Ligo George — Sun, 03 Jan 2016 08:50:32 +0000

As the name indicates, a bistable multivibrator has 2 stable states. It can be switched from one state to another by providing an external trigger. It can be used for storing a binary digit (bit) as it has 2 stable states (0 or 1). So it is commonly used in digital circuits, where it is named […]

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IR Remote Control for Home Appliances

Abhay Bajpai — Tue, 04 Jun 2013 15:55:27 +0000

IR Remote Control for controlling home appliances can be easily made using Decade Counter CD4017, 555 Timer and TSOP1738 infrared receiver. By using this circuit you can easily control your home appliances using your TV, DVD Player remote control or using a remote control circuit described here. Remote Control Receiver Circuit Diagram 2nd and 1st […]

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IR Transmitter and Receiver using 555 Timer and TSOP1738

Ligo George — Sat, 01 Jun 2013 04:52:41 +0000

IR Transmitter and Receiver pair can be easily made using 555 Timer, IR LED and TSOP1738 IR Receiver. This can be used for remote controls, burglar alarms etc. TSOP1738 is a very commonly used IR receiver for PCM remote control systems. It has only 3 pins, Vcc, GND and Output. It can be powered using […]

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FM Generation using 555 Timer

Ligo George — Sun, 19 May 2013 18:53:46 +0000

In communication systems, Frequency Modulation (FM) is the process in which information (message signal) is transmitted over a carrier wave by varying its instantaneous frequency. The difference between instantaneous frequency and central frequency of the carrier will be directly proportional to the instantaneous value of the amplitude of message signal. 555 Timer wired in Astable Mode can be used for […]

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Dancing Light using 555 Timer

Ligo George — Sat, 18 May 2013 06:36:45 +0000

A dancing light can be easily constructed using a 555 timer wired in astable mode. Please read the article Astable Multivibrator using 555 Timer before continuing. This circuit blinks two LEDs alternatively with some delay and it can be easily modified to include more LEDs or for controlling incandescent lamps. Time period of oscillation is determined by RC time […]

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