Audio Clip Player 1999

When i googling, i found this old scheme (I re-draw for clarity scheme) about audio clip player. from Alan nishioka ( http://www.nishioka.com ) it uses IC 555 timer, IC 4040 counter, IC EEPROM 27512, ResistorLadder DAC, and Mini Amplifier with 324 OP AMP to produce audio clip. hmm.. cute, i wish it can put on my bicycle to promo ice cream, bread, etc. Look like ringtone, ups i mean audiotone.

What about the wave data ?
Try to make from 8bit-mono *.wav file, use any audio converter (ex: winamp waveout) to convert from mp3 to wav. THe calculation, if use 8000hz sampling-rate and 64KB ROM so only 65536 byte / 8000 byte = 8 second !!! hmm...enough to say several word. for promo audio clip ?? see more his project at http://www.nishioka.com

how to re-presentate the percent. of duration ?
Use IC 4017.
input clock from A10 then lets the 4017 calculate the duration every 10% (4017 have 10 led or ) after 10 steps (or 8 steps in A11,A12,A13?) i will back to first led.
i Think it's cool behavior act like Knightrider LED.

I interest to Moving Sign LED

After reopening my storage, since 96 when in highschool
i discover that i have kit EPROM IC that not finished yet
i'm to see that. hmm.. today i want to reveal that.
i want to make my dream that day come true.
off cource i have enough money now to buy addition spare part.
next step, i start to use google to find schematic..
hmm.. only got from Mr. BobBlik use 24c512 EPROM with
8x8 display matrix led. any scheme make me more confuse
could u give me more cleary number pin of EPROM how to
program with keypad, i dont need serial connection to PC
do not use AT51 microproseccor (may be next year)
cause have limited fund to make that toys :-p
in the night i still try to learn several downloaded file
hmm.. regain knowlegde about electronic, digital, heat solder.