Jupiter-II
ricaflops·Jupiter-II
About the Jupiter-II PCB
Jupiter-II is an open source PCB design by ricaflops, published on GitHub under the MIT license. It is a board measuring 164.5 × 89.5 mm, with 122 components from 44 distinct parts.
Other key parts include the 6116, 27C128, Z80CPU, 74LS367 and GAL22V10. By type, the board carries 58 resistors, 23 capacitors, 17 ICs, 11 diodes, 6 connectors and 2 transistors.
It belongs with the audio and retro computing designs in this gallery.
From the project
Another Jupiter Ace computer clone
For more information on the original Jupiter Ace computer and an extensive software collection visit The Jupiter Ace Archive
Inverse Video Jumper - Jumper installed: Black text on white background (inversed) - Jumper removed: White text on black background (default)
ROM image selection Jumper - Jumper installed: Original Jupiter Ace 8K ROM image - Jumper removed: Boot with the Jupiter-II Expansion

Main components on the Jupiter-II
Jupiter-II bill of materials (BOM)
122 components, 44 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 6116 | DIP-24_W15.24mm_Socket | U1, U8, U9 |
| 1 | 27C128 | DIP-28_W15.24mm | U2 |
| 1 | Z80CPU | DIP-40_W15.24mm_Socket | U3 |
| 5 | 74LS367 | DIP-16_W7.62mm | U4, U10, U11, U12, U13 |
| 3 | GAL22V10 | DIP-24_W7.62mm_Socket | U5, U14, U17 |
| 1 | L7805 | TO-220-3_Vertical | U6 |
| 1 | 74LS166 | DIP-16_W7.62mm | U7 |
| 2 | 74HC4040 | DIP-16_W7.62mm | U15, U16 |
| 2 | BC817 | SOT-23 | Q1, Q2 |
| 1 | 6.55 MHz | Crystal_HC18-U_Vertical | Y1 |
| 1 | EXPANSION | Socket_Strip_Straight_2x25_Pitch2.54mm | J1 |
| 1 | KEYBOARD | Multicomp_MC9A12-1634_2x08x2.54mm_Straight | J2 |
| 1 | Conn_01x03 | Pin_Header_Angled_1x03_Pitch2.54mm | J3 |
| 1 | Conn_01x03 | Molex_KK-6410-03_03x2.54mm_Straight | J4 |
| 1 | 9Vdc | BarrelJack_Horizontal | J5 |
| 1 | Conn_02x15_Odd_Even | Socket_Strip_Straight_2x15_Pitch2.54mm | J6 |
| 1 | Heatsink | Heatsink_35x12mm_2xFixation1.5mm | HS1 |
| 1 | Jumper | Pin_Header_Straight_1x02_Pitch2.54mm | JP1 |
| 1 | Jumper | PinHeader_1x02_P2.54mm_Vertical | JP2 |
| 1 | SW_Push | SW_Tactile_SPST_Angled_PTS645Vx58-2LFS | SW1 |
Show 24 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 10 | 1N914 | D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2, D3, D4, D5, D6, D7, D8 +2 |
| 1 | 5V1 | D_DO-35_SOD27_P2.54mm_Vertical_KathodeUp | D11 |
| 13 | 100n | C_Rect_L7.0mm_W2.5mm_P5.00mm | C1, C2, C3, C5, C6, C13, C14, C15 +5 |
| 1 | 1u | CP_Radial_D6.3mm_P2.50mm | C4 |
| 2 | 47n | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C7, C8 |
| 1 | 2n2 | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C9 |
| 2 | 10u | CP_Radial_D6.3mm_P2.50mm | C10, C12 |
| 1 | 47u | CP_Radial_D6.3mm_P2.50mm | C11 |
| 1 | 1n8 | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C18 |
| 1 | 33p | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C22 |
| 1 | 100p | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C23 |
| 1 | 220k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1 |
| 11 | 10k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R2, R3, R6, R7, R8, R9, R10, R52 +3 |
| 1 | 220 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R4 |
| 33 | 1k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R5, R12, R14, R16, R17, R18, R19, R20 +25 |
| 1 | 12k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R11 |
| 2 | 5k1 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R13, R15 |
| 2 | 330 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R46, R56 |
| 1 | 2k2 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R47 |
| 2 | 1k5 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R48, R50 |
| 1 | 2k7 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R49 |
| 1 | 47k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R51 |
| 1 | 470 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R54 |
| 1 | 47 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R55 |
Jupiter-II design files
The KiCad project lives in the ricaflops/Jupiter-II repository on GitHub; these links point at the commit this page was built from.
- LayoutJupiter-II.kicad_pcb
Jupiter-II: common questions
How big is the Jupiter-II PCB?
The Jupiter-II measures 164.5 × 89.5 mm and is 1.6 mm thick.
How many components are on the Jupiter-II?
122 components, from 44 distinct parts. The full bill of materials is listed on this page.
Where can I download the Jupiter-II design files?
From the ricaflops/Jupiter-II repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Jupiter-II design in my own project?
Yes, under the terms of its MIT license, which ricaflops chose for the repository.
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