Article
Noise Generator
The noise generator proposed here operates according to the digital principle, in contrast with the more classical noise generator, which usually employs the noise voltage of a base/emitter junction to generate the signal. The big difference between the method used here and the classical analogue design is that we are not generating a real noise voltage but a collection of discrete frequencies.
Materials
Gerber file
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PCB
Component list
Resistors:
R2 = 56k?
R3 = 2k?2
R4 = 3k?3
P1 = 5k? preset
Capacitors:
C1,C3,C4,C5 = 100nF
C2 = 820pF
C6 = 3nF9
Semiconductors:
T1,T2 = BC547
T3 = BC557
IC1 = 74HCT14
IC2,IC3 = 74HCT164
IC4 = 4077
R2 = 56k?
R3 = 2k?2
R4 = 3k?3
P1 = 5k? preset
Capacitors:
C1,C3,C4,C5 = 100nF
C2 = 820pF
C6 = 3nF9
Semiconductors:
T1,T2 = BC547
T3 = BC557
IC1 = 74HCT14
IC2,IC3 = 74HCT164
IC4 = 4077
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