Radio Circuit. - This is one of implementation of Op-Amp IC 741 to build radio generator or oscillator system. It is only need small component completed to build this electronic circuit that basically component.
The electronic design circuit of White / LF Noise Generator using 741 IC is look like in Figure 1 below. Other component used like resistors, capacitors, and zener diode.
The electronic design circuit of White / LF Noise Generator using 741 IC is look like in Figure 1 below. Other component used like resistors, capacitors, and zener diode.
Beside we will show you electronic design circuit and component parts need, we also will give you global description about this circuit. So, please enjoy to continue reading this article until finish and get more useful.
Electronic Circuit Design
Component Parts
- R1 = 470 KΩ
- R2, R5, R8, R9 = 10 KΩ
- R3, R6, R10 = 100 KΩ
- R4 = 4.7 KΩ
- R7 = 1 MΩ
- C1 = 0.47 µF
- C2 = 100 µF/10v
- C3, C6 = 1 µF/16v
- C4 = 0.15 µF
- C5 = 0.015 µF
- C7 = 0.001 µF
- C8 = 100 µF/25V
- IC1, IC2 = 741
- ZD1 = 12V 400mW
Description
The electronic circuit design like in Figure 1 above show you generator circuit using Op-Amp 741 IC. Other component need also that can supply with low voltage DC +12V and ground source to charge this IC and all system component from power supply built. With this electronic design circuit you can produce White / LF noise generator that useful now.
According Electronicprojects blog mentioned that in every musician today is in need of a noise source, particularly those who practice with a group or use a synthesizer. The white noise generator gives an output to be fed to an amplifier. The white noise generated by the 12V zener diode is amplified 200 times along with the noise of the noisy 741 IC (IC1). The output is thus very noisy with plenty of white noise.
The output of IC1 is given to a low pass filter which cuts off high frequencies. Point A is connected to amplifier IC2. The feedback network of IC2 includes a 0.15 µF capacitor which reduces the gain at high frequencies.
The 0.001 µF capacitor at the output of IC2 also loads the output at high frequencies and reduce them. Thus the resultant output has a large amount of low frequency (LF) noise.
A small amount of white noise due to the IC itself is produced at the output, but it can be ignored. Point B is an artificial center point created for IC1 and IC2. Point C is connected to the capacitor which reduce the gain of IC2 at high frequencies..
The output of IC1 is given to a low pass filter which cuts off high frequencies. Point A is connected to amplifier IC2. The feedback network of IC2 includes a 0.15 µF capacitor which reduces the gain at high frequencies.
The 0.001 µF capacitor at the output of IC2 also loads the output at high frequencies and reduce them. Thus the resultant output has a large amount of low frequency (LF) noise.
A small amount of white noise due to the IC itself is produced at the output, but it can be ignored. Point B is an artificial center point created for IC1 and IC2. Point C is connected to the capacitor which reduce the gain of IC2 at high frequencies..
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