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4 layers191.2 × 190.9 mmNeptune, the printed circuit board in 3D

Neptune

Board-Folk/Neptune180

Recreation of the cancelled Sega console that combines Mega Drive/Genesis with 32X.

Open in PCBKitView on GitHub.kicad_pcb
Size
191.2 × 190.9 mm
Copper layers
4
Thickness
1.6 mm
Parts
379
Nets
732
Pads
2,432
Tracks, vias
11,140, 1,391
Pours
148
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
29 Nov 2023
Updated
28 Oct 2026

Overview

Neptune is an open-source printed circuit board by Board-Folk, from the Board-Folk/Neptune repository on GitHub. It is a 4-layer board of 191.2 × 190.9 mm with 379 parts on 732 nets, routed with 11,140 tracks and 1,391 vias.

It is built around the VJ0805Y104JXJMT, VJ1206V475MXJTW1BC and VJ0805Y223JXJPW1BC, with the CRCW080575R0FKEAHP, CBG201209U000T and CRCW080510K0FKEAC among its other parts. Its parts include 141 capacitors, 102 resistors, 5 inductors, 2 ICs and 1 connector.

Main components

12

README

helpers/Neptune-Region-Fix/README.md

Neptune Region Fix

A flex pcb to help fix the region issue.

See Service bulletin CSB_NEP_001

NeptuneRegionFix

It should align up with the pin 81 on IC6 to GND on the EXT Header.

I made the flex long, so it can be held done with something as it is quite small otherwise.

Flex PCB Production

When adding gerbers to your PCB Manufacturer, please choose the flex pcb option and add a note that you want to cut across the pads.

Otherwise they may ask you to change the gerber.

The current flex Gerber was produced to JLCPCB Specifications.

Parts

379
QtyValueFootprintReferences
48100nFCapacitor_SMD:C_0805_2012MetricC507, C509, C510, C513, C516, C518, C519, C521, C522, C528, C531, C532, C533, C535, C536, C538 +32
14222Neptune:EMI_3PEM11, EM12, EM13, EM14, EM15, EM16, EM18, EM21, EM22, EM23, EM24, EM25, EM26, EM28
144.7uFCapacitor_SMD:C_1206_3216MetricC506, C508, C512, C515, C517, C520, C523, C527, C530, C534, C537, C550, C551, C699
1322nFCapacitor_SMD:C_0805_2012MetricC32, C37, C38, C40, C41, C42, C45, C46, C47, C48, C49, C50, C51
1375Resistor_SMD:R_0805_2012MetricR40, R41, R511, R512, R526, R527, R528, R529, R530, R531, R544, R909, R910
120Inductor_SMD:L_0805_2012MetricFB1, FB7, FB13, FB502, FB505, FB510, FB511, FB513, FB514, FB515, FB516, FB517
1110KResistor_SMD:R_0805_2012MetricR502, R518, R520, R549, R558, R621, R701, R805, R806, R913, R914
810uF 16VCapacitor_THT:CP_Radial_D5.0mm_P2.50mmC21, C29, C30, CE20, CE503, CE504, CE505, CE931
8330Resistor_SMD:R_0805_2012MetricR68, R69, R70, R71, R521, R522, R917, R918
847uF 10VCapacitor_THT:CP_Radial_D5.0mm_P2.50mmCE27, CE28, CE506, CE507, CE508, CE602, CE913, CE914
84x10KResistor_SMD:R_Array_Convex_4x0603RA601, RA602, RA611, RA612, RM3, RM4, RM5, RM6
7100pFCapacitor_SMD:C_0805_2012MetricC3, C5, C16, C18, C553, C594, C595
610uF 35V X7RCapacitor_SMD:C_1206_3216MetricC802, C803, C804, C805, C807, C808
61uF/16VCapacitor_SMD:C_0805_2012MetricC903, C904, C905, C906, C907, C908
62.2KResistor_SMD:R_0805_2012MetricR10, R12, R15, R48, R525, R912
6210KResistor_SMD:R_0805_2012MetricR903, R904, R905, R906, R907, R908
51KResistor_SMD:R_0805_2012MetricR622, R704, R705, R706, R707
51nFCapacitor_SMD:C_0805_2012MetricC12, C14, C558, C561, C562
53KResistor_SMD:R_0805_2012MetricR503, R505, R514, R516, R539
54.7KResistor_SMD:R_0805_2012MetricR11, R523, R566, R611, R807
54x100Resistor_SMD:R_Array_Convex_4x0603RA1, RA2, RA4, RA5, RA6
55.62KResistor_SMD:R_0805_2012MetricR951, R952, R953, R954, R961
58.2KResistor_SMD:R_0805_2012MetricR513, R515, R517, R519, R561
44x33pFResistor_SMD:R_Array_Convex_4x0603CA601, CA602, CA603, CA604
3*Capacitor_SMD:C_0805_2012MetricC4, C15, C60
31.00KResistor_SMD:R_0805_2012MetricR962, R963, R964
3100uF 10VCapacitor_THT:CP_Radial_D5.0mm_P2.50mmCE514, CE518, CE520
3160Resistor_SMD:R_0805_2012MetricR535, R536, R537
333Resistor_SMD:R_0805_2012MetricR532, R533, R534
35.6KResistor_SMD:R_0805_2012MetricR50, R51, R52
2+9VConnector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_VerticalTP1, TP2
20Resistor_SMD:R_0805_2012MetricR545, R708
20.1uF 50V X7RCapacitor_SMD:C_0805_2012MetricC806, C809
2100KResistor_SMD:R_0805_2012MetricR901, R902
2100uInductor_SMD:L_1210_3225Metric_Pad1.42x2.65mm_HandSolderL501, L502
210uF/10VCapacitor_SMD:C_0805_2012MetricC901, C902
2120 OhmInductor_SMD:L_0805_2012MetricFB501, FB506
2150pF C0G/NP0Capacitor_SMD:C_0805_2012MetricC911, C912
22.2nFCapacitor_SMD:C_0805_2012MetricC559, C560
2220Resistor_SMD:R_0805_2012MetricR75, R702
2271Neptune:EMI_3PEM17, EM27
22KResistor_SMD:R_0805_2012MetricR559, R562
23.3nFCapacitor_SMD:C_0805_2012MetricC554, C555
2300KResistor_SMD:R_0805_2012MetricR915, R916
233pFCapacitor_SMD:C_0805_2012MetricC2, C17
2470pFCapacitor_SMD:C_0805_2012MetricC511, C514
247nFCapacitor_SMD:C_0805_2012MetricC577, C579
24x4.7KResistor_SMD:R_Array_Convex_4x0603RA607, RA617
2680pFCapacitor_SMD:C_0805_2012MetricC556, C557
2TC511664Neptune:SO-Mix-40IC507, IC508
2Unused/47/100pFCapacitor_SMD:C_0805_2012MetricC696, C697
1*1 10%Inductor_SMD:L_1210_3225Metric_Pad1.42x2.65mm_HandSolderL604
1*10Capacitor_SMD:C_0805_2012MetricC575
1*11Capacitor_SMD:C_0805_2012MetricC578
1*2 10%Inductor_SMD:L_1210_3225Metric_Pad1.42x2.65mm_HandSolderL605
1*3Crystal:Crystal_HC18-U_VerticalX501
1*4Resistor_SMD:R_0805_2012MetricR540
1*5Resistor_SMD:R_0805_2012MetricR541
1*8Capacitor_SMD:C_0805_2012MetricC570
1*9Capacitor_SMD:C_0805_2012MetricC574
1+5VConnector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_VerticalTP3
11.2KResistor_SMD:R_0805_2012MetricR14
11.6K 2%Resistor_SMD:R_0805_2012MetricR509
110Resistor_SMD:R_0805_2012MetricR524
1100Resistor_SMD:R_0805_2012MetricR547
1100/120pF (VA1/VA0)Capacitor_SMD:C_0805_2012MetricC526
110pFCapacitor_THT:C_Rect_L7.0mm_W6.5mm_P5.00mmC572
110pFCapacitor_SMD:C_0805_2012MetricC571
110pF (PAL only)Capacitor_SMD:C_0805_2012MetricC10
110pF C0G/NP0Capacitor_SMD:C_0805_2012MetricC801
110uFCapacitor_SMD:C_0805_2012MetricC961
110uF 10VCapacitor_THT:CP_Radial_D5.0mm_P2.50mmCE909
112uH 10%Inductor_SMD:L_1210_3225Metric_Pad1.42x2.65mm_HandSolderL603
1130KResistor_SMD:R_0805_2012MetricR802
113K 2%Resistor_SMD:R_0805_2012MetricR507
1150Resistor_SMD:R_0805_2012MetricR74
116KResistor_SMD:R_0805_2012MetricR560
1180Resistor_SMD:R_0805_2012MetricR506
11PNeptune:DSUB-9CN5
11uFCapacitor_SMD:C_0805_2012MetricC621

The 316 most common of 379 parts.

Questions

How big is the Neptune PCB?

It measures 191.2 × 190.9 mm and has 4 copper layers, 1.6 mm thick.

What parts does the Neptune use?

379 parts, built around the VJ0805Y104JXJMT, VJ1206V475MXJTW1BC, VJ0805Y223JXJPW1BC and CRCW080575R0FKEAHP. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Neptune KiCad files?

From the Board-Folk/Neptune repository on GitHub, at the commit this page was made from: the board is Neptune.kicad_pcb and its schematic 32X_main1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Neptune design in my own project?

Its repository states no licence, so its author keeps all rights: ask Board-Folk before reusing the design.

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