Two Tone Alarm generator using LM3900

This circuit use 2 beep danger sound origins. By use the integrated circuit LM3900 just one. Which compose OP-Amp 4 group stay within the integrated circuit and have , Mosfet , give -ing the sound with 8-80 ohm small-sized loudspeakers s by use , power supply 9V sizes will arrive at 12V may are battery 12 Voltage all right. For other detail have a few the equipment a little also, request friends have fun this circuit.

Personal Alarm using IC 74HC04
This circuit uses digital CMOS IC 74HC04 used power supply 3V only. The IC perform produce the frequency about 2.8kHz and 3.3kHz work can alternate into pieces warn to follow want. These handheld piezo screamers are also known as rape alarms. They are a very loud siren. This one is particul ...
Mini Trombone Sound generator by LM3909
This be Mini Trombone Sound generator circuit. By using integrated circuit the number LM3909 of NS. In using loudspeaker 25 Ohm sizes work by use voltage from AA 1.5V battery. In sound occurrence that resemble with trombone. It have the work depends on the principle uses voltage, which th ...
Two Tone Alarm with IC LM3900
Circuit Two Tone Alarm with IC LM3900 This be Two tone alarm use op-amp IC number LM3900 (Quad Amplifiers) perform produce the frequency square wave 2 level , be high frequency and low then mix the sound in the end danger beep that is appropriate it has can to link up a loudspeaker with , ...
Simple Sound Alarm Generator using CD4011
This is Music Sound Generator circuit. It is basic and simple circuit. By use integrated circuit digital number CD4011 or MC14011 or TC14011,it be nand gate logic. By three this circuit is giving can the sound about 10watt by use 8ohm loudspeakers and use power supply voltage 12V. Friends ...
Warbling Alarm Circuit with tone Generator
The circuit is see this it , sound generator warbling tone , which hear distinct in swoop down that have a voice disturb , get more than , single tone. By the transistor Tr2-TR3 assemble the circuit tone Generator , Which frequency modulated with output of TR1 which it frequency genera ...