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Integrated circuits (ICs) are the main component of each and every electronic circuit can be used for wide variety of purposes and functions. But sometime due to faulty ICs the circuit doesn’t work. Indeed it is lot tedious work to debug the circuit and confirm whether the circuiting is creating problem or the IC itself is dead. So to come up with these sorts of problems we intend to make a project which would confirm whether the IC un […]
Timers are frequently used in the industries to run process/operation with predefined time interval. The most popular type of timer is the programmable timer that has various facilities to configure the timer by users. However, it is expensive to build such timer using ICs and discrete components. Moreover, when countdown timer is used for laboratory instruments, it is expected to be flexible to handle. The 555 timer and counter ic has […]
Conventional methods of audio amplification use high power circuits to drive a loudspeaker for areas like an auditorium or any other hall. However for applications involving use of small loudspeakers for low range requirements, we can meet the requirements by constructing a low power amplifier with a low output current such as 200 mA. In this work, we are discussing the principle, design and operation of a low power audio amplifier us […]
The main objective of this project was to ensure a proper security to building against theft or intruder. The circuit uses 555 timers IC which was wired as a timing circuit, amplifier to obtain a maximum audible sound. The 555 timer times the circuits and also generates a tone and this tone is send to transistor which amplifies the tone generated through a loud speaker or buzzer. This device functions as a major security alarms used i […]
There are at least two popular applications of blinking a string of 110V/230V AC incandescent lamps. The first is audio-visual warning at construction sites or where repairing is going on. The second is to express joy and excitement during holidays like New Year’s Day. Here we use a very simple and low-cost timer NE555 to switch on and off two output loads alternately for audio and visual indications. You can achieve this by using a b […]
Sensitive Clap activated switch is an electronics device that can switch on & off a light, Fan, Radio or any other appliance by the sound of clap. This is the system of a very sensitive clap switch. It switches ON/OFF a White LED or electrical appliances through claps. The circuit can sense the sound of claps from a distance of 1-2 meters. Condenser Mic picks up sound vibrations caused by the clap. The main component of this clap […]
A police siren is a loud electronics device that produces sound similar to police siren. Siren is used to get other road users or drivers on the road out of their way. This project is on police siren sound that sound effects like the siren of an ambulance or police car which features low-pitched tones alternately. This project will be comprised of the oscillator circuits of two set. Using IC-555 timer IC are main both unit. The first o […]