White noise generator
10 more posts in this thread. [Missing image file: Simple White Noise Generator 2.jpg]
Hi /diy/, want to learn a bit about soldering and about electronics, so i was looking for a small project that would actually be usefull (well.. for me). So i was searching for a circuit diagram for a white noise generator that is not too complicated.
Now i'm not too knowledgeble about electronics and I'm trying to find out what I need. As far as I understand I would attach a 9V battery/power source/ to the 9V (+) and to gnd (i googled that it means ground, which here would also be -). I guess that the 4.7k and 47k stand for k ohm resistors and i found that the two e,b,c and the c,b,e thing represent a PN100 (is 2N3904 a type of PN100?). I do not know what the 0.1 thingy is. (I didn't find anything searching for BR2003.)
Any ideas on this one? I want to plug it into audio in and use it for random number generation. I do have a soldering iron somewhere so right now i am looking for which parts to get.
4 more posts in this thread. [Missing image file: pwm.gif]
I'm fairly inexperienced in advanced electronics, and I have few questions about a small project I'm doing.
Basically, I'm using a microcontroller as a sort of replacement for a VCO. I've got it decoding MIDI input, and right now it's outputting a PWM wave. I would like some way to change that output to a sinusoidal wave, and I was wondering if I could just use a simple low pass filter to do that?
Apologies if this is a retarded idea, but really any feedback or ideas you guys could give would be great.
tl;dr can you convert PWM to pure sinusoidal?
3 more posts in this thread. [Missing image file: Office-Chairs-91.jpg]
I've been wanting to get a really good office chair, but the more I look and browse, the more I realize that no matter how expensive the chair, there'll be at the very least one thing I don't like about it. Whether too short, too tall, no hydraulics, no swivel, too fast of a swivel, too high center of gravity, too low CoG, no arm rest, in-the-way arm rests, or maybe it just wouldn't fit in my desk.
So, I want to make one. Very hard plastic is the obvious choice when it comes to bought ones, but I think a nice wooden one - depending on the wood, would hold nicely. So, I'm looking essentially for the gadget aspects of the chair here. Give me some ideas for the hydraulic system, swivel system, wheels, lean, etc, or even random, nifty gadgets that'd be somewhat easy to incorporate. I'll work around with the overall design myself.
I'm not too worried about the price, but keeping it cheap would be nice. I wouldn't want to sacrifice quality, but sometimes quality devices start to increase in price faster than in quality.
So, ideas /diy/nosaurs?
27 more posts in this thread. [Missing image file: boat.jpg]
Hi guys, A friend and I are looking to build a boat, or something like it, mainly out of wood, using little power tools, We don't want it to be small, Like a tiny rubber dinghy, but not a large canal boat. Also want to spend as little money as possible, as we're hoping our time and effort to go the long way about things will save money. Can you tell me everything that I need, should expect, decent suggestions etc??