Eprom programmer for parallel port
This programmer can programming all standard 8 bit EPROMs in range from 2716 (2 KByte, 24 pin) up to 278001 (1 MByte, 32 pin). It uses standard and cheap chips, most expensive part is Textool socket. Of course it's not indispensable using especially this type of socket.
Eprprgst.zip - software for Atari ST with source.
Component list:
IC : TL 497 - 1 ; 74HC00 - 1 ; 74HC14 - 1 ; 74LS06 - 1 ; 74HC377 - 4 ; 74HC541 -1
74HC574 - 2 ; CD 4555 -1 . Total 12 IC-s.
Transistor : NPN - 6 ; PNP -11 .
You may put on this positions
practically any low power silicon transistor, only polarity is
important. Characteristics should be about: max. current: 100mA
or more, max. voltage: 30V or more.
Examples: NPN: BC237, BC548, BC337. PNP:
BC307, BC558, BC327 etc.
LED : 2 piece .
Diode : 1N4148 - 11 ; Germanium or schottky -2 .
Zener diode : 3V - 4 ; 6V8 -1 ; 14V -1 ; 22V -1 ; 26V -1 ; 33V -2 .
Last revised: 05/13/98 .
