From Mouser Electronics    Catalog #585
800 346 6873

ICs required for one DRO interface that will use an IRQ

quan.
2	506-214-AG19DC 14 pin Dip Socket 	page 136 	$.14
2	CD4077BE  Quad  Exclusive NOR Gate	page 36		$.38		
6	10K ohm resistor
1	1K ohm resisitor
1	NPN Transistor  592-2N3904		page 20		$.19
6	PNP Transistor 33-KN2907		page 19		$.18
1	400-5053  4.19x2.74x1.57 box		page 272	$3.73
1	400-7053  4.02x2.56 lid			page 272	$2.63
1	152-3325   25 pin connector		page 116	$1.63
4	534-720  Rubber Bumpers			page 277	$.18
1	1055-TA1120   switch			page 222	$1.45
1	140-CD50Q9-104Z   .1 Capacitor		page 190	$.18


You will also need to etch the PCB board.   Board.dxf and Board.gif contains
a ready to go layout for your board.


