Alarm & Voice

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32 Seconds Voice Record/Playback Module

Project   has been designed around Win bond’s ISD1616 IC (SMD) IC, which is fully integrated, single-chip, single massage voice record and playback device ideally project suited to a variety of electronics systems. Massages are stored in flash memories made in unique Multilevel Storage Technology (MLS). Therefore, voice or audio data are stored directly into the memory in their natural form without any compressions alike digital approach, providing high-quality, solid-state audio reproduction. Project provides high quality audio recording and simple operations.  Massage duration is user selectable in ranges from 10 to 20 Seconds depending on the sampling rates from 4 KHz to 12 KHz adjustable via on board potentiometer (preset), giving the users greater flexibility in duration versus recording quality.


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Water Level Sensor Alarm

This small water sensor alarm circuit makes a loud warning sound when a humidity sensor detects a quantity of water.


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Light Sensitive Audio Oscillator

Light Sensitive Audio Oscillator project is a fun loving project which will create different sound effects depending on the light falling on the sensor (LDR)


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2 Tone Audio Oscillator Circuit

2 Tone Audio Oscillator is a simple circuit which will generate audio tone on the press of a button.  This circuit can be very useful as test equipment for audio equipment or as a signal source in an audio input.


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3 tone audio oscillator

3 Tone Audio Oscillator Circuit : 3 Tone Audio Oscillator is a simple circuit which will generate audio tone on the press of a button. This circuit can be very useful as a test equipment for audio equipment’s or as a signal source for  an audio input.


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Audio Oscillator Generator Adjustable 115Hz-1Khz

Audio Oscillator project simply produces audio tones for use in the range of 115 Hz to 1 KHz.  This kit is a must for audio technicians and experimenters alike.


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Piezo Disc/Piezo Diaphragms Driver Circuit

Piezoelectric Diaphragms are piezoelectric ceramic disks adhered to a metal plates of brass or nickel-alloy. Diaphragms can be classified into External Drive Type and Self Drive Type.


MINI MELODY GENERATORMini Melody Generator IC


3 TONE SIREN (1)

3 TONE SIREN USING UM3561


 PIEZO DISC DRIVER TONE GENERATOR

Tone Generator is a simple project which generates an Oscillating Frequency to
drive a PIEZO disc to produce tones.


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Sound to Light Effects using 5 LEDS and LB1403/CA1403 IC


MOISTURE SENSITIVE ALARM B

Moisture Sensitive Alarm Circuit Using BC547 Transistor and PCB Based Sensor