LCScan - logical circuit scanner

General information

power voltage:	8..12V DC
load current:	150 mA+external load
number of inputs:	8 with Schmitt-trigger
number of outputs:	8 TTL level

Appearance
Schematic and PCB draws

subject	size	file type
schematic draw	19.83	KiCAD schematic file
printed circuit board	67.14	KiCAD board file
schematic draw (A/4)	144.45	Postscript file
PCB solder side (A/4)	60.63	Postscript file
PCB component side (A/4)	44.98	Postscript file
PCB silk screen (A/4)	67.36	Postscript file
all in one	76.74	ZIP archive

more files (pcb-, front- and back film, etc.)


Components

position	name	type/value	position	name	type/value
C1-C8	capacitor	100 pF	J2-3	connector	DB9F
C9	polarized capacitor	1 µF 16V	J4	connector	2.5 jack
C10-13	capacitor	1 nF	J5-6	connector	banana jack
C14-15	capacitor	1 nF	R1-9	resistor	470 ohm
C16	polarized capacitor	1000 µF 25V	SW1	switch
D1-16	diode	1N4148	U1-2	IC	74LS14
D17	LED	5 mm	U3	IC	74LS245
D18	diode	BY135	U4	IC	74LS157
J1	connector	DB15F	U5	IC	7805

Internal connectors

'PC' conn.-board		'In' conn.-board		'Out' conn.-board		'Power' conn.-board
'PC' conn.	board	'In' conn.	board	'Out' conn.	board	'Pwr' conn.	board
1	J6	1	J2/8	1	J3/8	+U	J4/1
2	J1b/1	2	J2/6	2	J3/6	GND	J4/2
3	J1c/1	3	J2/4	3	J3/4
4	J1c/3	4	J2/2	4	J3/2
5	J1a/2	5	J2/1	5	J3/1
6	J1a/4	6	J2/7	6	J3/7
7	J1a/6	7	J2/5	7	J3/5
8	J1a/8	8	J2/3	8	J3/3
9	J1b/3	9	J6	9	J6
10	J1b/2
11	J1c/2
12	J1a/1
13	J1a/4
14	J1a/5
15	J1a/7

Other connectors:
   J5: to '+5 V' banana jack
   J6: to 'GND' banana jack
   D17: 'power on' LED (1-Anode)
   SW1: 'power' switch

External connectors

'PC' connector		'In' connector		'Out' connector
pin	function	pin	function	pin	function
1	GND	1	D0	1	D0
2	-AUTOFD	2	D1	2	D1
3	SLCT	3	D2	3	D2
4	PE	4	D3	4	D3
5	D3	5	D4	5	D4
6	D2	6	D5	6	D5
7	D1	7	D6	7	D6
8	D0	8	D7	8	D7
9	GND	9	GND	9	GND
10	BUSY
11	-ACK
12	D4
13	D7
14	D6
15	D5

Cables

Cable between interface and PC

interface	LPT port	interface	LPT port
1	18-25	9	18-25
2	14	10	11
3	13	11	10
4	12	12	6
5	5	13	9
6	4	14	8
7	3	15	7
8	2

Measuring cables

pin	wire colour	pin	wire colour
1	white	6	green
2	yellow	7	blue
3	orange	8	black
4	red	9	-
5	magenta