6 layers243.8 × 243.8 mm
Raven
agranlund/raven
Homemade MC68060 + DSP56303 Atari-compatible computer. Hardware, firmware, and software stack
331 parts87
4 layers198 × 85 mm
spark4pi- is a modular hardware platform for managed instrument implementations controlled over Raspberry Pi compatible 40 pin interface.
- Size
- 198 × 85 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 132
- Nets
- 93
- Pads
- 392
- Tracks, vias
- 742, 129
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 12 Mar 2024
- Updated
- 27 May 2024
Overview
Spark is an open-source printed circuit board by lightside-instruments, from the lightside-instruments/spark4pi-digital-io repository on GitHub. It is a 4-layer board of 198 × 85 mm with 132 parts on 93 nets, routed with 742 tracks and 129 vias.
It is built around the 74LVC1G125, SN74LVC1G14DBV and TXU0101DCK. Its parts include 29 resistors, 22 capacitors, 20 ICs, 19 diodes and 12 transistors.
Main components
3
74LVC1G125
SOT-353SOT-353 Buffers, Drivers, Receivers, Transceivers ROHSWuxi I-core ElecBuffers, Drivers, Receivers, Transceivers
SN74LVC1G14DBV
SOT-23-5-40℃~+85℃ 1 1 1.16V~3.33V 1.65V~5.5V 10uA 2.3V 32mA 32mA 390mV~1.87V 550mV 6.5ns@2.5V,50pF 74LVC Schmitt trigger 电源关断保护、噪声抑制功能 SOT-23-5 Inverters ROHSTexas InstrumentsInverters
TXU0101DCK
SC-70-6-40℃~+125℃ 1 1 1.08V~5.5V 1.08V~5.5V 12mA 12mA 200Mbps Level translator Power-off protection、Output enable high-impedance SPI、JTAG、UART Tri-State Unidirectional SC-70-6 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
README
READMEspark4pi-* is a modular hardware platform for managed instrument implementations controlled over Raspberry Pi compatible 40 pin interface. The design is inspired by the Spark hardware platform for networking as form factor but with a Raspberry Pi 40 pin connector as management interface instead of 96boards.
The spark4pi-digital-io has 6x SMA connectors connected to input (3.3V or 1.65V) and output drivers (3.3V or 5V with open-circuit and 1.65V or 2.5V with 50 ohm termination ) with configurable direction that are connected to GPIOs on the Raspberry Pi connector. 2 GPIOs per channel one for selection of direction and one for the actual signal.
The project includes the following components:
- board - schematic and PCB design files for KiCAD
- mechanical - technical documentation for production of a 1U 19 inch rack mountable ESD Acrylic box.
- board-pi-bridge - design files for board that connects together a Pi compatible board with the instrument extension base board mounted to the left of the Pi compatible control board.
The project is published by Lightside Instruments AS under TAPR Open Hardware License. Read the LICENSE file for details.
Parts
132| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | 100nF | Capacitor_SMD:C_0402_1005Metric | C101, C102, C104, C201, C202, C204, C301, C302, C304, C401, C402, C404, C501, C502, C504, C601 +2 |
| 13 | 1K | Resistor_SMD:R_0402_1005Metric | R1, R101, R102, R201, R202, R301, R302, R401, R402, R501, R502, R601, R602 |
| 12 | Q_NPN_BEC_BRT | Package_TO_SOT_SMD:SOT-323_SC-70 | Q101, Q102, Q201, Q202, Q301, Q302, Q401, Q402, Q501, Q502, Q601, Q602 |
| 8 | spark:mount_hole | , , , , , , , | |
| 6 | 10K | Resistor_SMD:R_0402_1005Metric | R104, R204, R304, R404, R504, R604 |
| 6 | 51 | Resistor_SMD:R_0805_2012Metric | R103, R203, R303, R403, R503, R603 |
| 6 | 74LVC1G125 | Package_SO:TSOP-5_1.65x3.05mm_P0.95mm | U101, U201, U301, U401, U501, U601 |
| 6 | Conn_01x01_Shielded | spark:SMA_LINX_CONSMA002_Horizontal | J101, J201, J301, J401, J501, J601 |
| 6 | D_TVS | Resistor_SMD:R_0402_1005Metric | D103, D203, D303, D403, D503, D603 |
| 6 | LED_BLUE | LED_SMD:LED_0603_1608Metric | D102, D202, D302, D402, D502, D602 |
| 6 | LED_GREEN | LED_SMD:LED_0603_1608Metric | D101, D201, D301, D401, D501, D601 |
| 6 | SN74LVC1G14DBV | Package_TO_SOT_SMD:SOT-23-5 | U103, U203, U303, U403, U503, U603 |
| 6 | TXU0101DCK | Package_TO_SOT_SMD:SOT-363_SC-70-6 | U102, U202, U302, U402, U502, U602 |
| 6 | Val** | spark:raspberry-pi-signal-interface-silks | Ref**, Ref**, Ref**, Ref**, Ref**, Ref** |
| 4 | , , 1, 2 | ||
| 4 | 10uF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4 |
| 2 | 5.1K | Resistor_SMD:R_0402_1005Metric | R2, R5 |
| 2 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J3, J4 |
| 1 | spark:lsi-logo-32mm-silks | ||
| 1 | 220 | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | 68 | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_2x01_P2.54mm_Vertical | J2 |
| 1 | LD1117S33TR_SOT223 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | LED_WHITE | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | LM317_SOT-223 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | Raspberry_Pi_2_3 | spark:PinHeader_2x20_P2.54mm_Vertical_1_04mm | P5 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
Questions
How big is the Spark PCB?
It measures 198 × 85 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Spark use?
132 parts, built around the 74LVC1G125, SN74LVC1G14DBV and TXU0101DCK. 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 Spark KiCad files?
From the lightside-instruments/spark4pi-digital-io repository on GitHub, at the commit this page was made from: the board is board/spark.kicad_pcb and its schematic board-pi-bridge/pi-bridge.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Spark design in my own project?
Its repository states no licence, so its author keeps all rights: ask lightside-instruments before reusing the design.
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