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BigBoy

transistorfet·retroverse·components/bigboy/hardware/BigBoy/BigBoy.kicad_pcb

Top view of the BigBoy PCB
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BigBoy is an open source STM32 PCB design by transistorfet: a 4-layer, 160 × 100 mm board with 120 components (45 distinct parts). It is built around the AP7361EA-33E-13, STM32H743BITx, KC3225Z25.0000C1KX00, LAN8742A and more. Filed under retro computing.

A collection of VME-based hardware and software for modular computers

Status: Built & Tested but with design issues (see errata)

A generic card with an STM32H7 microcontroller on it that interfaces to the VME bus using GPIO. I had intended to use it as a bus analyzer, but it's a bit too slow for the k30p CPU at 12.5MHz.

BigBoy, from the project README
From the project README

Built around

AP7361EA-33E-13STM32H743BITxKC3225Z25.0000C1KX00LAN8742A74ALVC164245DGHirose PCN10-128P-2.54DS(72)

Parts list

120 components, 45 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
AP7361EA-33E-13
U1
1
STM32H743BITx
U2
1
KC3225Z25.0000C1KX00
U3
1
LAN8742A
U4
5
74ALVC164245DG
U5, U6, U7, U8, U9
1
Hirose PCN10-128P-2.54DS(72)
U10
1
32,768Hz
Y1
3
5V
J1, J2, J4
2
3.3V
J3, J5
1
Conn_ST_STDC14
J6
1
Hirose DM3D-SF
J7
1
Amphenol 10118194-0001LF
J8
1
Bel SI-60062-F
J9
1
SPI1
J10
1
I^{2}C1
J11
1
USART1
J12
1
USART2
J13
1
STEMMA
J14
1
BOOT
JP1
1
USB POWER
JP2
Show 25 more
QtyPartRefs
1
USART1 POWER
JP3
1
USART2 POWER
JP4
1
SPI1 POWER
JP5
1
SH
JP6
1
UB1/2
SW1
1
RESET
SW2
1
3.3V
TP1
1
Ground Loop
TP2
1
POWER
D1
2
Harvatek HV-32312
D2, D3
2
600Ω @ 100MHz (MI0805K601R-10)
L1, L2
2
4.7uF
C1, C2
36
0.1uF
C3, C5, C7, C8, C10, C11, C12, C13 +28
1
1uF
C4
2
2.2uF
C6, C9
2
5pF
C26, C27
1
10uF
C33
11
10k
R1, R3, R8, R9, R14, R15, R16, R21 +3
7
220
R2, R4, R5, R6, R7, R33, R34
7
33
R10, R11, R12, R17, R18, R19, R20
5
50
R13, R25, R26, R27, R28
1
1.5k
R23
1
12.1k
R24
2
68
R29, R30
2
4.7k
R35, R36

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