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ceteras·Cobra-XP·kicad/main.kicad_pcb

Main PCB layout, top view — open source board by ceteras

About the Main PCB

Main is an open source PCB design by ceteras, published on GitHub under the MIT license. It is a 2-layer board measuring 299.2 × 180 mm, with 434 components from 172 distinct parts.

Other key parts include the 74LS74, 74LS153, MMN4164, 74LS193 and 74LS10. By type, the board carries 118 resistors, 81 ICs, 78 test points, 50 connectors, 48 capacitors and 31 jumpers.

From the project

Derived from Cobra, an experimental board for testing all kind of mods.

CoBra XP este un design de computer bazat pe microprocesorul Z80, derivat din proiectul Cobra.

Este construit pentru a experimenta cu circuite digitale și pentru a crea noi proiecte Z80. Acest lucru este făcut pentru a onora comunitatea de modderi care au muncit din greu pe computerele lor Cobra, adăugând funcții și extensii. Munca lor a însemnat tăierea pistelor, adăugarea de fire, construirea plăcilor de extensie și, cel mai important, cunoașterea la perfecțiune a pcb-ului și a schemei, aducând soluții inovatoare uimitoare. Exemple de acest tip de contribuții pot fi văzute pe cobrasov.com.

Main, from the project README
From the project README

Main components on the Main

74LS7474LS153MMN416474LS19374LS1074LS0074LS0874LS5174LS2074LS8674LS157LA4525W27C512AY39810MAX23274LS37374LS393GAL26V1274LS1174LS0474LS4274LS95L79L05_TO92GAL22V10

Main bill of materials (BOM)

434 components, 172 distinct parts.

QtyPartRefs
5
74LS74
U2, U15, U18, U36, U61
4
74LS153
U3, U20, U22, U39
16
MMN4164
U4, U5, U6, U7, U8, U9, U10, U11 +8
4
74LS193
U12, U13, U32, U33
2
74LS10
U14, U40
6
74LS00
U16, U17, U37, U54, U55, U87
2
74LS08
U19, U38
1
74LS51
U21
1
74LS20
U34
2
74LS86
U35, U88
5
74LS157
U41, U51, U58, U80, U85
1
LA4525
U42
1
W27C512
U43
1
AY39810
U44
1
MAX232
U45
1
74LS373
U46
1
74LS393
U47
5
GAL26V12
U48, U49, U50, U64, U65
1
74LS11
U52
2
74LS04
U53, U57
Show 152 more
QtyPartRefs
1
74LS42
U56
6
74LS95
U60, U77, U78, U81, U82, U83
1
L79L05_TO92
U62
1
GAL22V10
U63
5
CDB407
U71, U72, U73, U74, U86
1
P8212
U76
1
8255
U79
1
Z80CPU
U90
1
LM741
U92
1
39SF040
U94
1
2N2219
Q2
1
14MHz
Y1
7
Conn_01x10
J1, J101, J102, J103, J104, J106, J107
1
C96ABC
J2
3
DIN-5
J3, J4, J9
2
Conn_01x01_Male
J5, J8
1
Conn_02x10_Odd_Even_MountingPin
J7
2
VU
J11, J12
11
Conn_01x40
J13, J14, J15, J16, J17, J18, J19, J20 +3
10
Conn_01x14
J23, J24, J25, J26, J27, J28, J29, J30 +2
4
Conn_01x25
J34, J35, J36, J37
1
Conn_01x04
J39
8
1N4148
P11, P12, P13, P14, P15, P16, P17, P18
3
150
CAT1, CCS1, CHB1
2
390
CCC1, CVR1
5
1N4148
DBR1, DBR2, DBR3, DBR4, DBR5
2
Conn_01x15
JEXA1, JEXB1
1
U56_15
JP1
1
CS1
JP2
1
U35_10
JP3
1
U35_9
JP4
1
NCS64
JP5
1
U35_2
JP6
1
U35_1
JP7
1
U52_1
JP8
1
U52_2
JP9
1
U52_11
JP10
1
~{VMA}
JP11
1
U55_10
JP12
1
U56_14
JP13
1
U56_15
JP14
1
8272_4
JP15
1
SO_O5
JP16
1
SR_OE
JP17
1
8272_5
JP18
1
~{ICS}
JP19
1
BR_WE
JP20
1
BR_CE
JP21
1
BR_OE
JP22
1
SR_CE
JP23
3
bA14
JP24, JP25, JP26
1
U35_6
JP27
1
U35_4
JP28
1
U35_5
JP29
1
MA8
JP30
1
MVA8
JP31
1
~
RSW1
3
10K
RV1, RV2, RV3
1
D0
TP1
1
D1
TP2
1
D2
TP3
1
D3
TP4
1
D4
TP5
1
D5
TP6
1
D6
TP7
1
D7
TP8
1
bA0
TP9
1
bA1
TP10
1
bA2
TP11
1
bA3
TP12
1
bA4
TP13
1
bA5
TP14
1
bA6
TP15
1
bA7
TP16
1
bA8
TP17
1
bA9
TP18
1
bA10
TP19
1
bA11
TP20
1
bA12
TP21
1
bA13
TP22
1
bA14
TP23
1
bA15
TP24
1
~{bM1}
TP25
1
~{bRFSH}
TP26
1
~{bRD}
TP27
2
~{bWR}
TP28, TP60
1
~{bMREQ}
TP29
1
~{bIORQ}
TP30
1
~{CLK}
TP31
1
~{NMI}
TP32
1
~{INT}
TP33
1
U55_9_10
TP34
12
GND
TP35, TP51, TP52, TP53, TP54, TP55, TP56, TP57 +4
1
U52_6
TP36
1
U35_10
TP37
1
ROM_A14
TP38
1
B_ROM_1
TP39
1
U56_15
TP40
1
U58_3
TP41
1
IORQ
TP42
1
373_OE
TP43
1
BAS_A17
TP44
1
BAS_A18
TP45
1
B_ROM_WE
TP46
1
S_ROM_WE
TP47
1
B_ROM_CE
TP48
1
B_ROM_OE
TP49
1
S_ROM_CE
TP50
1
IO1
TP63
1
IO2
TP64
1
IO3
TP65
1
IO4
TP66
1
IO5
TP67
1
IO9
TP68
1
CS1
TP76
1
LO6
TP77
1
~{VMA}
TP79
1
S_ROM_OE
TP80
1
PO
TP81
1
LS
TP82
1
~{OES}
TP83
1
ROMCS
TP84
1
TO
TP86
1
~{MREQ}
TP88
9
1N4148
D1, D2, D3, D6, D7, D8, D9, D10 +1
1
1N5817
D4
16
100n
C1, C2, C3, C4, C9, C10, C11, C12 +8
7
10u
C5, C7, C15, C16, C17, C32, C45
2
150
C6, C14
9
100n
C8, C21, C22, C31, C39, C41, C46, C47 +1
3
470u
C19, C20, C44
2
1uF
C23, C25
1
220p
C24
4
470uF
C26, C27, C28, C29
1
15p
C30
1
330n
C33
1
270
C36
1
1500uF
C43
21
33
R1, R2, R3, R4, R5, R7, R8, R18 +13
19
1K
R6, R20, R22, R23, R26, R27, R31, R71 +11
1
2K2
R9
17
4k7
R10, R11, R12, R13, R14, R15, R16, R17 +9
23
680
R35, R38, R45, R46, R47, R49, R50, R51 +15
2
150
R48, R92
1
330
R70
7
470
R72, R78, R79, R80, R81, R82, R83
1
220
R74
4
100
R75, R76, R77, R91
12
10K
R88, R89, R90, R95, R97, R98, R117, R118 +4
1
75
R93
8
8K2
R99, R100, R101, R102, R103, R104, R105, R106
1
240
RN1

Main design files

The KiCad project lives in the ceteras/Cobra-XP repository on GitHub; these links point at the commit this page was built from.

Main: common questions

How big is the Main PCB?

The Main measures 299.2 × 180 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Main?

434 components, from 172 distinct parts. The full bill of materials is listed on this page.

Where can I download the Main design files?

From the ceteras/Cobra-XP repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Main design in my own project?

Yes, under the terms of its MIT license, which ceteras chose for the repository.

More boards in Cobra-XP