White Noise Generator Project- Part 1
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- Опубліковано 12 вер 2024
- For Project #7 I will create a white noise generator device. The whole project will be modeled and animated w/ Blender(in part 2).
This is Part 1:
- Create Schematic
- BreadBoard Circuit
- Fabricate Board
should've had the video playing just white noise the whole way through
I like the way you think. Using the triangle file the way you did and putting your solder in the desoldering spool. Genius! The finished board looks very good and professional and you had a cool choice of music. Subscribed and liked.
I built it, I had some problems with the GND but it works, thanks. (gracias👍)
Nice video, only one objection: _Never_ solder an IC directly onto a board, _always_ use a socket.
it's a personal preference. Just makes it easier to replace if you damage it.
@@sdp8483 Not just that. It also prevents heating the chip, which might be harmful depending on the chip. Sure, nothing to lose if it's a 741 cheap opamp, but you generally want to avoid heating up more delicate stuff so much.
What's your speaker? How many watts speaker is good?
Why not using the op amp to amplify the voltage of the signal? You can make the feedback loop global - wiring the output of the transistor to the "+" input of the op amp (which is the "-" input of the composite amp).
And why the "+" input is floating, why it is not wired to the 1/2 of supply voltage? You are using it as a second source or randomness? What if it gets close to the rails level?
Hi !, I would like to add a pair of potentiometers to be able to vary the white noise, but I don't know where to put them in the circuit ...
Hi! I'm trying to build a simple white noise generator, but it appeared a bit tricky - i tried several schematics but achieved no success. Your schematic seemed quite simple, I tried it but for some reason it didn't work. I even repeated the layout of components in your video, but it still didn't work. What could be the problem? The speaker just makes a short sound when powering the circuit and stays silent. I tried both battery and power adapter. I use "2N 3904 / H 331" transistors and "UA741CN" IC.
What voltage are you using? I would definitely try varying the voltage a bit.
Thanks for advice! What voltages are acceptable here? I'm using 9v like in schematics and in video. Also tried using power adapter to make sure to supply 9v in case the battery delivered less. With power adapter there's some barely hearable weak squeaking noise, which doesn't sound like white noise.
I read that for some reason the transistors wired like this do not last longer (the noise level diminishes over time).
No connection to the opamp's non-inverting input - not good, its input stage is unbiased. It needs something to bias it. Anyway a reverse-biased pn junction like that makes pink noise, not white noise. Certainly sounds like
pink noise to me.
Where can I get circuit explanation???
There is a small leakage reverse current between the emitter and the base r of the first transistor (Q1), and the waveform it generates is noisy because of how semiconductors work in the physical world (not something you can explain solely through the circuit, semiconductor, thermodynamics and solid state physics are involved, in processes I don't understand myself). Then the noise's voltage is amplified through the 741N Op-Amp after going through an RC-filter that will remove the DC-component of the noise signal. This signal's voltage is amplified with the Op-Amp, and then it goes through the transistor to be able to drive higher current loads, like a small speaker like the one you see on the video. This is done also through a capacitor (C2), in what's called "AC coupling" which removes the DC component of the noise signal, just like before the op-amp.
Wrong diagram. It's a joke.