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Old 01-26-2012, 04:55 AM
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Join Date: Jun 2011
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Quote:
Originally Posted by mbates14 View Post
Ya, I seen that display on ebay. I didnt buy one yet. I like VFD displays that have VU or spec analyzer bars on it. or bars in general. I am a audio-visual type of guy that likes VU meters, spec ans, winamp visual plugins, etc...

I do however, REALLY like that VFD you have in your sig. My next project if i ever get around to finishing it is building a small scale MP3 player with an application specific VFD display, kinda like the one in your sig. Except the one I am going to use is the NEC FIP11AMW8 for this project, which can be had cheap at a few places.

So with the NEC FIP11AMW8, I have already mapped out the pins, segment tables, etc... just have to finish up the code to drive it, and its going to interface to another CPU that does the MP3 Decoding and SD card access. the CPU that will run the VFD display will also fetch IR codes from my apple remote, along with doing VU meter calculations off of the analog return from the MP3 decoder IC. Might be alot of overhead for a single CPU, but its just for I/O. the MP3 decoder is a separate CPU because of timing critical operations, dont want a buffer underrun = choppy playback, so the less things it has to do outside of playing the mp3, the better. Outside of buffering MP3 data, it also has a command interpreter to be able to talk to the I/O CPU. going to use RS232, or maybe SPI between the two CPUs, and of course the DOS/SD file system handler.

the I/O CPU's display scan routine will run off an internal timer which will output a square wave from the PWM pin to drive a power amplifier circuit that will not only supply the anode voltage/current, but also the filament supply. Basically a discrete replacement for the LM9022 which no longer exists. Why do i wanna use scan derived PWM signal? so you dont get beat artifacts on the display :-)

and the most fun of it all, itll be written in BASIC. because I cant code in C, and besides my BASIC skills are a close match to what C can do. Hell, I wrote BASIC code for a small crypto unit that would cypher a digital bitstream going in, in 512-byte block cyphers. Mainly used for secure RF.

What its intended purpose for the time was sending secure transmissions over CB. (dont ask me why, just something to do, and it worked). an MP3 decoder/encoder IC VS1053 would be used as an encoder as a 64kbps mono MP3 which gives you ALOT of time before you have to rebuffer, plus it was convenient for the 115.2kbps RS232 port on the AVR. So i would buffer 512bytes, scramble it, and re-transmit it as pilot toned ASK over CB (which worked horribly, required a strong signal but at least it worked).

the receiver would detect the pilot tone to signal the decoder to kick in. Once it kicked in, it would decode the ASK into a bit stream which the AVR would decode back into 512byte blocks, decrypt them, and send them to the MP3 decoder IC at the other end. it worked as a test of concept but it was REALLY buggy, mainly do to the method i sent the signal over the RF line, ASK. I coulda used like manchester or some other means of modulating the digital signal, but i didnt know how, and i still dont to an extent.
Give me picture on FIP11AMW8 please or pdf
I HAVE NEC FIP 11GM6 NO 421-421
i search MOST SOPHISTICATED VFD display on vcr;hi-fi;air-cond,etc..still tune for it
http://7113.fc2web.com/rc-x90.html
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Last edited by Visual; 01-28-2012 at 01:39 AM.
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