4 layers165.5 × 51.6 mm
Panel
AlphaCassiopeiae/8800
Firmware and PCBs for aCassiopeiae, a minature Altair 8800 clone
222 parts1
4 layers133.4 × 32.3 mm
Firmware and PCBs for aCassiopeiae, a minature Altair 8800 clone
- Size
- 133.4 × 32.3 mm
- Copper layers
- 4
- Thickness
- 1.2 mm
- Parts
- 136
- Nets
- 228
- Pads
- 743
- Tracks, vias
- 1,561, 274
- Pours
- 16
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 27 Jan 2025
- Updated
- 30 Apr 2025
Overview
Card is an open-source printed circuit board by AlphaCassiopeiae, from the AlphaCassiopeiae/8800 repository on GitHub. It is a 4-layer board of 133.4 × 32.3 mm with 136 parts on 228 nets, routed with 1,561 tracks and 274 vias.
It is built around the RP2350B, W25Q128JVSIQ and AMS1117-3.3, with the TS-1187A-B-A-B, 10145226-0241N13LF and ABM8-272-T3 among its other parts. Its parts include 89 resistors, 24 capacitors, 5 ICs, 5 connectors and 2 switches. It belongs with the RP2350 boards of this library.
Main components
8
RP2350B
QFN-80-EP(10x10)48 Power-on reset (POR)、Watchdog reset、External pin reset (NRST)、Built-in general-purpose timer、Integrated LDO、True random number generator (TRNG)、Hardware ECC check、Independent watchdog (IWDG) QFN-80-EP(10x10) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
TS-1187A-B-A-B
SMD-4P,5.1x5.1mm-30℃~+85℃ 1.5mm 1.6N 100,000 cycles 12V 5.1mm 5.1mm 50mA Gold No Round Button SPST Surface Mount,Vertical Without Bracket SMD-4P,5.1x5.1mm Tactile Switches ROHSXKB ConnectionTactile Switches10145226-0241N13LF
插件Edgeboard ConnectorsAmphenol
ABM8-272-T3
SMD3225-4P-40℃~+85℃ 10pF 12MHz 50Ω SMD crystal oscillator ±30ppm ±30ppm SMD3225-4P Crystals ROHSAbraconCrystals
SS34
SMA(DO-214AC)-55℃~+125℃ 3A 40V 500uA@40V 550mV@3A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
USB4105-GF-A
SMD-40℃~+85℃ 1 12P 48V 5A Black Female Surface Mount, Right Angle Type-C USB 2.0 SMD USB Connectors ROHSGlobal Connector Technology (GCT)USB Connectors
Parts
136| Qty | Value | Footprint | References |
|---|---|---|---|
| 80 | 330 | Resistor_SMD:R_0402_1005Metric | R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25, R26 +64 |
| 14 | 100n | Capacitor_SMD:C_0402_1005Metric | C3, C6, C9, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C24 |
| 4 | 0402WGF0000TCE | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | JP2, JP3, JP5, JP7 |
| 4 | Jumper_2_Small_Open | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | JP1, JP4, JP6, JP8 |
| 3 | 1k | Resistor_SMD:R_0402_1005Metric | R1, R3, R4 |
| 3 | 4.7u | Capacitor_SMD:C_0402_1005Metric | C2, C7, C8 |
| 3 | Conn_01x03_Pin | Connector_JST:JST_XH_S3B-XH-A-1_1x03_P2.50mm_Horizontal | J1, J4, J5 |
| 2 | 15p | Capacitor_SMD:C_0402_1005Metric | C1, C4 |
| 2 | 22u | Capacitor_SMD:C_1206_3216Metric | C22, C23 |
| 2 | 27 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R5, R6 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R9, R10 |
| 2 | MCP23017_SO | Package_SO:SOIC-28W_7.5x17.9mm_P1.27mm | U3, U5 |
| 2 | TS-1187A-B-A-B | Button_Switch_SMD:SW_Push_1P1T_XKB_TS-1187A | SW1, SW2 |
| 1 | 100k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7 |
| 1 | 100n | Capacitor_SMD:C_0603_1608Metric | C10 |
| 1 | 10145226-0241N13LF | Library:DIMM-DDR4 | J3 |
| 1 | 10u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C21 |
| 1 | 3.3u | Library:IND-SMD_L2.0-W1.6_AOTA-B201610S3R3-101-T | L1 |
| 1 | 33 | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | 4.7u | Capacitor_SMD:C_0603_1608Metric | C5 |
| 1 | ABM8-272-T3 | Library:ABM8-272-T3_ABR | X1 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U4 |
| 1 | RP2350B | Library:RP2350-QFN-80-1EP_10x10_P0.4mm_EP3.4x3.4mm_ThermalVias | U2 |
| 1 | SS34 | Diode_SMD:D_SMA | D1 |
| 1 | USB4105-GF-A | Library:GCT_USB4105-GF-A | J2 |
| 1 | W25Q128JVS | Package_SO:SOIC-8_5.23x5.23mm_P1.27mm | U1 |
More from AlphaCassiopeiae/8800
2- 2 layers220 × 160 mm
Backplane
AlphaCassiopeiae/8800
Firmware and PCBs for aCassiopeiae, a minature Altair 8800 clone
25 parts1
Similar boards
- 4 layers96.5 × 85.5 mm
- 2 layers76.2 × 122.2 mm
Calculator full schematic revB
SCREAM325/TI_INFINITY
contains PCB file for PCBway and GCODE files for speaker case.
116 parts - 4 layers68.6 × 56 mm
Cartridge
coco-chameleon/chameleon-hardware
TRS-80 Color Computer cartridge emulator
95 partsCERN-OHL-W-2.0 - 4 layers55 × 100.5 mm
OSS Radio Hardware Design
Arkos-Engineering/HT-15_hardware
We can split this out into separate repos later, right now its very convenient to have everything here.
256 parts72 - 4 layers90 × 100 mm
- 4 layers27.9 × 63.5 mm
Pico2-ice
tinyvision-ai-inc/pico2-ice
Doc | Hardware | SDK | Schematic | Assembly | Discord
124 parts60MIT - 4 layers100 × 100 mm
FarmMesh Node
chinawrj/FarmMesh-Node
Developing an integrated hardware and software solution for farm-wide Mesh networking: RP2350B/ESP32-C5 nodes, firmware, network protocols, and Wi-Fi/BLE sensor access.
164 parts - 4 layers100 × 100 mm
DMXion 4port node
NEOgHacking/DMXion_4Port_Node
A 4 port dmx node with rdm funtionallity. Connects via ARTNET or sACN
275 parts2GPL-3.0
Questions
How big is the Card PCB?
It measures 133.4 × 32.3 mm and has 4 copper layers, 1.2 mm thick.
What parts does the Card use?
136 parts, built around the RP2350B, W25Q128JVSIQ, AMS1117-3.3 and TS-1187A-B-A-B. 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 Card KiCad files?
From the AlphaCassiopeiae/8800 repository on GitHub, at the commit this page was made from: the board is ecad/card/card.kicad_pcb and its schematic ecad/backplane/backplane.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Card design in my own project?
Its repository states no licence, so its author keeps all rights: ask AlphaCassiopeiae before reusing the design.