i've seen a couple in the modded case gallery does anyone know of a schematic or diagram of how to make one ? Links would be great Cheers
The LM3915 IC is more or less a VU meter on a chip. You'll need either 10 LEDs or a 10-step bargraph with it, plus optionally a resistor and a pot if you want to calibrate it. Check page 2 of the datasheet for a schematic . You'll need two for stereo.
you could also use the lm3915 to linearise ( is that a real word?) a thermistor output and use it as a bar graph temp sensor also the lm3914 is basically the same but linear so better for lm35 temp sensors
I'm not really an overclocker or a gamer, I'll leave that stuff to the rest of the crew. Ask me a tropical fish question (freshwater or marine) if you want to find out my real expertise .
haha! I am a gamer! I am a gamer! I've recently invented the Hiten Mitsurugi Style kill in TFC, check the gaming forum (please please please ? ), aha!
OK i ripped out the schematic, checking a few things, pins 2 and 4 are just ground rite ? in the top left is that a capacitor ? EDIT :: changed schematic to easier one
there is a but not in a diag output from sound card | | |.......|.| +-----|.|---------- input to the circuit shown above |.......|.| | | | input to yr earphones . used for spacing ok now?
this ? -wont the current be reduced making it quieter ? so the wire that comes from the sound card, is three (left,right,ground) so for left, the left channel, two wires left and ground connet to which pins ?
you dont connect the vu meter directly but through a non electrolytic capacitor the bit that looked like this .........|.| -------|.|------ was supposed to be a capacitor .........|.|
I would like to know the name of that fish that changes color and blows up. He looks spikey but not like a blowfish. If you drop a goldfish in the tank, he changes colors then swallows it up whole. Smaller than a basketball and spherical in shape. I think he is salt water. I think tigerfish, but I might be wrong. How much do they cost and how hard is it to take care of?
Found this diagram does look correct for what im doing i will have two of course for each channel. , anyone know where i can get these chips from in the UK ? Cheers for the info so far
u can get the lm3915 from rapid but u need to get a catalogue first (3 quid)but they r way better than maplin they even do glitter glue gun glue
Hmmm, don't know exactly what you mean by a blowfish (fugu?), but you prabably are thinking of a Diodon which should only cost you $15-25 or thereabouts, since they're not rare. They're easier than the average marine tropicals, since they seem to feed vigorously. As always, ask to see it eat before you buy one... You may also be thinking about a Ostracion (boxfish), but they're not spiny, so I think the first one is what you meant. Boxfish r0ck, though.
back on topic The device is nothing more than a voltmeter. It will reduce the current by a negligible amount, so you may want to hook it up downstream of your amplifier, but I'd recommend hooking inbetween the sound card and speakers, since you can build a clean enclosure with jacks. (Allows you to change speakers later.) Left and right channel share a ground. so you need two ICs, for each one you connect pin 5 to the signal lead and pin 4 to ground. I don't know how many volts your sound card line out is pushing, but use a pot in place of R2 and you can trim your meter to peak when your audio is peaking. Yes, although I'd use your signal ground at pin 4. The top left is a bypass capacitor, you can probably omit it if your leads to the LEDs aren't excessively long. I wouldn't consider the value critical.
Cheers Linear, you are the electronics Guru ! Ok so i've update the things you said, to the diagram. If you could just check it over, the i will begin work as soon as i can Im assuming i would need to use 470 Ohm resistors before all the LED's, considering im going to be using the standard blue, style ones.
