How is your Old PC

Do you have Old PC ?.. over 10 years still alive? good.. keep play with it until burn out.
try to understand the old architecture is more fun cause more simple. In 1990 PC running able to process data 16 bit. The brain procesor name such as 8088, 80286, 80386, and pentium. ( today we use 64 bit brain processsor...) just visit this link to learn about your Old PC.
Page 3 Tech Topic
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Page 0309 (the last page number)
so try to change the number randomly, start page from 0003 until 0039
Note : Not all information uploaded in that server. but i got several the Information that i need.
beware the file NOTHERE.HTM = realy not there !!! (blank page) due insulfficient server disk space.
I want to create some Pascal Languange to Code here.. (include Asembler language) Remember an old day fun...

EEPROM 27c512 Programmer

akhirnya ketemu deh pemrograman EEPROM 27c512 dari Nader. Belum sempet kucoba sih.. yang penting sedot dulu disini :
EEPROMV1Nader

trus skemanya mana ? ya kunjungi saja websitenya http://nadergator.com/
Prototype

Gimana neh.. saya punyanya hanya IC 27256, ada yang dapat memodifikasi nader eprom programmer ini supaya dapat dipakai langsung pada 27256. :(

classic car amplifier la 4440

Background

I just search over internet and I found the scheme of LA4440 Amplifier.
Using Output Capasitor 1000uF to pass the AC signal and blok DC signal go trough Speaker. Contains two OP AMP, so can design as stereo power amplifier. Above the scheme it's normal configuration for two speaker (stereo) 6 Watt each. also able to design as BTL Amplifier bellow scheme). You can see here only one speaker. It means two Op-Amp configured into a couple OP-AMP to push pull the speaker. REMEMBER DO NOT Connect any wire of Speaker to Ground in BTL configuration.

Design Scheme

Here the source scheme from electronica.ro

Prototype PCB

Here the Old PCB design I bought from Saturn Product. daurulang means recycled :-). I need only Amplifier part so i cut this board, sorry...

Perhaps some day I will Upload the Images which containt full fill part.