Petr Simandl - Electronics

Electronics

Here I'd like to present some results of my work. The documentation of hardware is created by OrCad 386 software. All files are packed by pkzip compression utility and consist of schematic, schematic part library, Printed Circuit Board and some additional files, like a software for used processor or PC software, both with source code.

Documentations and tips

PC keyboard Description of communication between PC and keyboard.	PC mouse Description of communication between mouse and PC.
OrCAD 386 and Colorgraf Aritma 512 (HP 7475A compatible) OrCAD 386 HTML plotter output correction for plotting directly on copper.	Fluor tube starter Description of starter of fluor tube lamp. Not completed...
Passive cooler for overclocked procesor.	UR4 - an interface for ZX Spectrum.
Colorgraf Aritma 512 Decription of cabels and drivers for this plotter.	Minigraf / Amagraf A 507 Connecting set Minigraf - PC
XY4140 and XY4150 Some programs for plotters XY41XX.	HP 200 LX Palmtop Cable and communication
Optics Fiber Optics and FSO	Micowave Antennas and active hardware for data transfer
Platforms Alix and Intel Johnstown

Constructions

EEPROM Programmer and reader of serial EEPROM memories.	SONDA This is actually 8 bit A/D converter, connected via RS232 line to PC.
SOUND One of periferies for ZX Spectrum 128 +2A. It is very simple sound card with four channels equipped with resistor D/A converter based on R-2R resistor net.	Fast serial interface This is a part of SONDA design. Just optocoupler/isolator circuit architecture.
PROG84 Programmer and reader of PIC16C84 microprocessor.	ZDROJTRF Simple power supply designed for my civil band transmitter Elix GIANT.
Kladivo A periphery for my Speccy. Allows to break a program and to run another one from external RAM.	Video-signal generator WITH PIC16C84.
Resetator A PC watchdog that generates reset when the observed signal dissapears (comp is frozen).	Ronja