white noise generator

[Asha ramesh]

hello!!
im workin on my mini project which needs a white noise generator.i wantd t knw if der is any simple circuit of WNG.

 

[Asha ramesh]

need help in designing white noise generator

Is there any alternative for zener diode d1n5235 ??

 

[mvs sarma]

welcome to ETI

zenor diodes are known for generating white noise. some information that could be useful is contained here
https://www.google.co.in/url?sa=t&r...sg=AFQjCNGDw9ORsOyiICzdT-aSX71mY1Dzlg&cad=rja
meantime please check and avoid typing sms coded words on this international site.
all the best.

 

[Asha ramesh]

Thank you for the link.i have got 1 more circuit of noise generator which uses D1n5235,is there any replacement for this zener diode?

sorry about the sms language,im just used to it.

 

[colin55]

You can use any transistor. Use the base-emitter leads. Try one way then the other way and you will get noise. Use a 1M resistor to the supply.

<mod edit: self promotion deleted. If you have content to share, please post directly to ETO. Do not link to your own personal website>

 

[mvs sarma]

" I am...." it is ok' as you are fresh here. you would help others know your needs and try to help you.
All the best.

 

[Asha ramesh]

oops sorry again..
thank you

 

[Asha ramesh]

ok i will try it out.
thank you

 

[audioguru]

MODERATOR, please merge his threads about this same thing. [Done. Moderation]

Asha, next time please continue your first thread about something instead of starting a new thread.
The article in your other thread showing the circuit of a noise generator shows the part numbers for 5 common zener diodes but not the one you cannot find.
The article says that a 12V zener diode produces 10 times more noise (+20dB) than lower voltage (5V) zener diodes.

 

[ronsimpson]

Using a PIC
http://www.electricdruid.net/index.php?page=projects.noisegen
**broken link removed**

Pink noise
https://www.electro-tech-online.com/custompdfs/2012/02/pink_noise_generator_manual.pdf

http://www.discovercircuits.com/DJ-Circuits/noisegen.htm


From linear
https://www.electro-tech-online.com/custompdfs/2012/02/dn70.pdf

Years ago I built a white/pink noise source from one IC. (From National I think.) Made with a long shift register and XOR gates in one small IC. It will take me hours to find the black box again.

 

[audioguru]

Years ago I built a white/pink noise source from one IC. (From National I think.) Made with a long shift register and XOR gates in one small IC. It will take me hours to find the black box again.

I made the same pink noise generator. I calibrated it against a very expensive one.

 

[Asha ramesh]

could you please tell me the applications of white noise generator

 

[audioguru]

A white noise generator produces random noise. Its high frequencies have more output power than low frequencies.
A pink noise generator is a white noise generator with the high frequencies reduced -3dB per octave. A pink noise generator produces the same amount of power in every octave band of frequencies and is used to measure the frequency response of speakers because using sine-waves produces echoes that interfere with the measurement.

 

[canadaelk]

That was the MM5837 by NS, long discontinued. E

 

[unclejed613]

the reason 12V zeners work better than 5V zeners is that 12V zeners work in avalanche mode.
https://en.wikipedia.org/wiki/Avalanche_diode

 

[Mr RB]

I made the same pink noise generator. I calibrated it against a very expensive one.

Yeah I remember making one of those in the late 70's (maybe early 80's?) from a kit, it had a little DIP 8pin specialised IC in it, with a switch for white/pink noise. Ahh memories.

 

[unclejed613]

i remember using those.... i also remember if you listened carefully, you could hear the sequence repeat, because there was a click somewhere in the sequence.