Input frequency using be in the range 1/10 – 1/15 of the frequencies in above. In this case, sets the frequency at 18Khz. We use R6 to adjust the frequency of the oscillator circuit internal IC1. I so use the R3 and the ZD1 is a reduced voltage for IC1 to only 3 V, as need. However, for convenience to using with a voltage relays up to 12V. The IC1 needs to use a voltage only 3 volts. The figure below shows a circuit in actual use. The heart of working in this circuit is IC1 ( UM3763) that is designed for this particular work. This is simple sound control circuit as the Whistle activated light switch circuit, that different from a little common circuit is requires high-frequency noise Such as whistle sound etc. Surprisingly much, can turn on – shut down electric devices with a whistling sound. Whistle activated light switch circuit with PCB
The single power supply voltage is 5V-12V. The circuit use Mic1 is a condenser microphone, when it gets the sound make the voltage across changing as AC signal and amplified by LM324 op-amp and show the sound with LED1 at the output. He said ”DEAR SIR, TODAY I HAVE MADE A SOUND DETECTOR CIRCUIT, AND ITS WORKING VERY GOOD AS ITS CAPACITY TO CATCH THE AUDIO IS TOO HIGH AND EASILY DETECT THE SOUND AND THEN IT WORKS. It is a simple Sound detector circuit using LM324. Today Kunal Banerjee send this project to me. Simple Sound detector circuit using LM324 It can produce a sine wave signal as well. Stops problems with components and The project not work.Īlthough the circuits are is not the same. The sensitivity of the circuit can be increased by reducing the value of R1 down to only 22K, it would be more sensitive times. However, you may be converted to another use, the output of the circuit to control the relay. This circuit is designed primarily for use with a camera.
#Ic1a op amp trial
The flashlight works immediately but does not works Trial output terminal is connected to the light flash. Try to clap away from the MIC for about 2-3 inches. And then use a small headphone drop across R7, if the circuit work correctly you will hear the sound from your headphone, next to connected the output to Set of the flash lamp of a camera.
Then, try to attach the power supply to the circuit. PCB Sound SCR Switch by IC 1458 & SCR C106D How builds itĪll devices can be installed onto the PCB, as shown in Figure 2 for the wire MIC, using a shield, to prevent a noise signal, which may make this works errors. We use this circuit with the battery 9V, C3 provides a more stable and the C1-10uF placed to minimize disturbance, may cause the circuit to function errors. The output from IC1b be fed through C2-4.7uF to trigger at pin G of SCR1-C106D works Immediately The first op-amp IC1a is designed to gain about ten times, the output of IC1a will enter to pass the R5 to pin 6 of IC1b, that it is designed to gain about 100 times, So the all gain of this circuit is equal to 1,000 times. Make us cost-effective, convenient, and economical with space.Ĭome see the circuit to continue. TL072ACP is IC Dual J-FET Op-Amp 8 Pin DIP that cheap and well.īecause the internal structure of the two op-amps, by the shape remains the same IC-741 which the op-amp IC is timeless. LF353 is IC Dual Low-Noise JFET OPAMP 3 MHz 8-pin DIP that better quality.
The sound signal is received by the condenser microphone Into the sound signal amplifier circuit That we choose IC op-amp No.
When you see advantages its, Might be a good idea now, come look the function of this circuit. Sound SCR Switching circuit using IC-1458 and SCR-C106D
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