login
quincy
-
Posts
44 -
Joined
-
Last visited
Never
Content Type
Profiles
Forums
Events
Posts posted by quincy
-
-
http://optronik.tripod.com/cgi-bin/loader.pl?pe_catcam.htm
heres a fun project that i think could progress a lot if it was added here at electronics lab
id like to do it, but i have no idea how to start programming microcontrolers
my goal here would be to rework this project to be easier, with just a timer instead of a microcontroller, and add it to the projects here.
but first id need some help with timers, becouse i dont know how to do that
im going to contact the guy and see what he thinks about this -
ha
funny story
speaking of capacitors, though, couldnt you charge a ceramic capacitor with a 9v so that it is charged up beyond 9vs and then fire? just considering that you dont really want to fire that rapidly.
or you could have a couple of capacitors charging up while you werent using it, and when you got into a more vicous battle you would have several shots saved up.
and speaking of the vents, wouldnt the explode at much less current if there were no vents? i was thinking you could heatshrink it
as far as a more complex and more efficient circuit, i have no idea. but if i thought about it a lot i think i could get the mechanics worked out -
okay, im not asking you anymore, but ive tried a 2n4922 (http://www.onsemi.com/pub/Collateral/2N4921-D.PDF)
and a 2n6037
http://pdf1.alldatasheet.com/datasheet-pdf/view/21704/STMICROELECTRONICS/2N6037.html
and i cant get it to work.
i also used:
1k pot
9v battery
1uf 50v electrolytic capacitor
8ohm, probably .5w speaker
will all npn transistors work that arent darlingtons? -
yaay!
i wish i had a lab
what transistor did you use?
i was thinking of using mj9001
or 9000
or 2n9000 i cant remember, obviously
but something from motorola thats one of the round ones, and i think its 40v npn and darlington
supposedly used for switching applications
do you have any idea if that would work alright?
edit
i guess ive been rather vague
im trying to find the datasheet -
ah. i see. well, i might try some anyways, considering i get them all for 75cents at axman
ill try any other transistors i can get for cheap there, and update this page with which work.
or maybe i could update the project? does anyone know how i might do that?
anyways, thanks -
thanks!
but what about the transistors as far as darlingtons?
what does anyone think a darlington npn might change in the output? -
i'd like to know a lot of stuff about some of the audio oscillators that are projects here.
i thought id just start a general discussion :D
to start off, i was wondering about the kind of transistors that can be used for the reverse bias oscillator.
-can you use NPN darlingtons?
and were can you put a potentiometer or varistor in the circuit to control the frequency?
-thanks, quincy -
drawing it would be tedious, but a good way
if your more computery, you can do it in paint
either way, id like to see it, because ive been looking for a simple audio oscillator cicuit myself -
rclick->view background image
-
i thought mosfets were transistors
i thought it stood for something feild effect transistor -
thats not that special
this is spam, isnt it -
thanks!
at the time i was looking around for schematics, those were the only two i could find that seemed right. -
oh, and also, does anyone know anything about the people who designed these amps? would it be helpful to contact them? or do they only speak russian or something?
-
here are 2 amps that i am thinking of building:
http://www.electronics-lab.com/projects/audio/017/index.html
http://www.electronics-lab.com/projects/audio/005/index.html
which should i build? i am aware that the first has some errors in the schematic and the power supply. i also probably need some help figuring those out too. -
how do you measure it in speakers? can you just get a bunch of tones in sound files that are completely one frequency? should i try and find some of these? or should i just play notes on a sawtooth synth on my keyboard until the speaker wont play them?
and on a different note, how are capacitors used in crossovers to seperate the frequencies?
im obviously a bit lost on FR.
please help me learn something -
I'd rather have smell-o-vision. That way, when I watch Food Network, I can get extra hungry.
youre a weirdo
not in a bad way
but still -
i think i understand it now!
the signal is transfered into varying amounts of gas in a glass globe, so the flame gets produces more/less heat wich creates a vibration in the air with pure pressure
crazy!
its supposed to sound really good -
i would guess most of you know how normal speakers work, with just a cone and all. but even the weirder ones still have a vibration created with a varying current going through a conductor to create a magnetic field.
but i recently came across something that is very different
and i have no idea how it works.
it has something to do with "plasma arcs"
and a finished one has to have a gas supply (?!?!)
anyway, heres the link:
http://www.plasmatweeter.de/ -
yes! thank you! i just wanted to make sure it wasnt some other random thing that i didnt know about. Ive just never seen it that way before.
-
oh, come on. the three of you who already read this could at least say something.
-
what does it mean in this circuit when the wire just ends with a dark rectangle? is that ground?
i cant find that symbol anywhere.
catcam project!
in Inventive/New Ideas
Posted
Sorry, here
mr-lee-catcam.de