2 layers216 × 150 mm
Motherboard-201
artemisamsx/artemisa
Schematics, PCB designs and HDL simulations to build a 8-bits MSX computer
106 parts67
4 layers
Saturn
johangroth/Saturn2An SBC based on WDC 65C816.
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 67
- Nets
- 138
- Pads
- 641
- Tracks, vias
- 0, 0
- Routed
- Not yet
- KiCad
- KiCad 5 (file 20171130)
- Created
- 10 Jul 2017
- Updated
- 27 Feb 2020
Overview
Saturn is an open-source printed circuit board by johangroth, from the johangroth/Saturn repository on GitHub, published under the MIT licence. It is a 4-layer board with 67 parts on 138 nets.
It is built around the MAX238EWG+, 74HC74D and DS1511Y+, with the TL7705BCP and DS1813-5+ among its other parts. Its parts include 22 capacitors, 12 ICs, 8 connectors, 7 resistors and 4 diodes.
Main components
5
MAX238EWG+
SOIC-24-300mil-40℃~+85℃ 120Kbps 5V 7mA Transceiver Yes SOIC-24-300mil RS232 ICs ROHSMaxim Integrated (Analog Devices)RS232 ICs
74HC74D
SOIC-14-40℃~+125℃ 1 15ns 2 2V~6V 3.5pF 37ns@6V,50pF 3ns、3ns、3ns 40uA 5.2mA 5.2mA 74HC Series 82MHz Asynchronous Complementary D-Type Rising Edge Set and Reset SOIC-14 Flip Flops ROHSNexperiaFlip Flops
DS1511Y+
EDIP-280℃~+70℃ 4.5V~5.5V Built-in Watchdog timer、Backup power management and battery charging、Battery low-voltage detection、InsideSRAM/NVRAM、Alarm function、Power-off retention of registers、Sleep/Wake control EDIP-28 Real Time Clocks ROHSMaxim Integrated (Analog Devices)Real Time Clocks
TL7705BCP
PDIP-80℃~+70℃ 1 270ns 4.55V Active Low Manual reset input Push-pull Voltage monitor PDIP-8 Supervisor and Reset ICs ROHSTexas InstrumentsSupervisor And Reset ICsDS1813-5+
TO-92-3-40℃~+85℃@(Ta) 1 1.2V~5.5V 150ms 4.75V Active Low No Open Drain Voltage Monitor Yes TO-92-3 Supervisor and Reset ICs ROHSAnalog DevicesSupervisor And Reset ICs
README
README.mdSaturn
An SBC based on WDC 65C816. Will be superseded by Jupiter.
Parts
67| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | 0.1uF | Capacitors_ThroughHole:C_Disc_D4.7mm_W2.5mm_P5.00mm | C6, C7, C8, C9, C10, C11, C12, C13, C15, C16, C17, C20, C21, C22 |
| 5 | 1.0uF | Capacitors_ThroughHole:CP_Radial_Tantal_D4.5mm_P2.50mm | C1, C2, C3, C4, C5 |
| 4 | MountingHole | Mounting_Holes:MountingHole_3.2mm_M3_DIN965_Pad | H1, H2, H3, H4 |
| 3 | 470 | Resistors_ThroughHole:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R4, R5, R7 |
| 2 | 100uF | Capacitors_ThroughHole:CP_Radial_D6.3mm_P2.50mm | C18, C19 |
| 2 | 3.3k | Resistors_ThroughHole:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R3, R6 |
| 2 | AS7C34096A | saturn:SOJ-36 | U2, U6 |
| 2 | LED | LEDs:LED_D3.0mm | D1, D4 |
| 2 | WD65C22PLCC44 | saturn:PLCC-44_THT-Socket | U7, U8 |
| 1 | 15uF | Capacitors_ThroughHole:CP_Radial_D5.0mm_P2.50mm | C14 |
| 1 | 16MHz | Oscillators:Oscillator_DIP-8 | X2 |
| 1 | 1A | Fuse_Holders_and_Fuses:Fuseholder5x20_horiz_open_Schurter_0031_8201 | F2 |
| 1 | 200mA | Fuse_Holders_and_Fuses:Fuseholder5x20_horiz_open_Schurter_0031_8201 | F1 |
| 1 | 22k | Resistors_ThroughHole:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R1 |
| 1 | 3.3k | Resistors_THT:R_Array_SIP5 | RN2 |
| 1 | 3.3k | Resistors_THT:R_Array_SIP9 | RN1 |
| 1 | 3.6864 MHz | Oscillators:Oscillator_DIP-8 | X1 |
| 1 | 475 | Resistors_ThroughHole:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R2 |
| 1 | 74HC74 | Housings_DIP:DIP-14_W7.62mm_Socket | U9 |
| 1 | AS6C62256A | Housings_DIP:DIP-28_W15.24mm_Socket | U5 |
| 1 | DIRQ1 | Diodes_ThroughHole:D_T-1_P5.08mm_Horizontal | D2 |
| 1 | DIRQ2 | Diodes_ThroughHole:D_T-1_P5.08mm_Horizontal | D3 |
| 1 | DS1511Y+ | Housings_DIP:DIP-28_W15.24mm_Socket | U12 |
| 1 | DS1813 | TO_SOT_Packages_THT:TO-92_Inline_Narrow_Oval | Q1 |
| 1 | Expansion Bus | Connectors_IDC:IDC-Header_2x20_Pitch2.54mm_Straight | J7 |
| 1 | IDE | Connectors_IDC:IDC-Header_2x20_Pitch2.54mm_Straight | J4 |
| 1 | JTAG | Connectors_IDC:IDC-Header_2x05_Pitch2.54mm_Straight | J6 |
| 1 | MAX238 | Housings_DIP:DIP-24_W7.62mm_Socket | U3 |
| 1 | PANIC | Buttons_Switches_ThroughHole:SW_PUSH_6mm_h4.3mm | SW2 |
| 1 | POWER_IN | Connectors_Molex:Molex_NanoFit_1x04x2.50mm_Angled | J5 |
| 1 | RESET | Buttons_Switches_ThroughHole:SW_PUSH_6mm_h4.3mm | SW1 |
| 1 | RS232a | Connectors_IDC:IDC-Header_2x05_Pitch2.54mm_Straight | J1 |
| 1 | RS232b | Connectors_IDC:IDC-Header_2x05_Pitch2.54mm_Straight | J2 |
| 1 | SC28L92PLCC44 | saturn:PLCC-44_THT-Socket | U4 |
| 1 | SPDT | Switches_THT:SW-SPDT-0900766b81587629 | S1 |
| 1 | Stop System | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | J8 |
| 1 | TL7705B | Housings_DIP:DIP-8_W7.62mm_Socket | U10 |
| 1 | VIA2PB | Connectors_IDC:IDC-Header_2x07_Pitch2.54mm_Straight | J3 |
| 1 | WD65C816S_PLCC44 | saturn:PLCC-44_THT-Socket | U1 |
| 1 | ispMACH4A | saturn:PLCC-44_THT-Socket | U11 |
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Questions
What parts does the Saturn use?
67 parts, built around the MAX238EWG+, 74HC74D, DS1511Y+ and TL7705BCP. 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 Saturn KiCad files?
From the johangroth/Saturn repository on GitHub, at the commit this page was made from: the board is HW/saturn.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Saturn design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).