From cbde04c9bc45ea54cc509a65247c62a82f64bca9 Mon Sep 17 00:00:00 2001 From: LennertW <4999638+LennertW@users.noreply.github.com> Date: Sat, 6 Aug 2022 18:39:43 +0200 Subject: Initial commit --- pcb/README.md | 20 + pcb/gerbers_modchip.zip | Bin 0 -> 130820 bytes pcb/ibom.html | 4345 ++++++++++++++++++++++++++++++++++++ pcb/interposer_footprint.kicad_mod | 248 ++ pcb/interposer_symbol.kicad_sym | 40 + pcb/schematic.pdf | Bin 0 -> 120480 bytes 6 files changed, 4653 insertions(+) create mode 100644 pcb/README.md create mode 100644 pcb/gerbers_modchip.zip create mode 100644 pcb/ibom.html create mode 100644 pcb/interposer_footprint.kicad_mod create mode 100644 pcb/interposer_symbol.kicad_sym create mode 100644 pcb/schematic.pdf (limited to 'pcb') diff --git a/pcb/README.md b/pcb/README.md new file mode 100644 index 0000000..a4c83fb --- /dev/null +++ b/pcb/README.md @@ -0,0 +1,20 @@ +# PCB files +This folder contains the schematic and gerber files to produce your own modchip PCB. +We ordered our modchip PCB from JLCPCB and selected a PCB thickness of 0.8mm, 1.6mm might work but is not tested. + +An interactive BOM is [provided](./ibom.html), the main active components on the PCB are: +* RaspberryPi RP2040 microcontroller +* W25Q128JVS Flash storage +* MCP1405 MOSFET driver +* Vishay SISS54DN-T1-GE3 Capacitor switching MOSFET +* Vishay SISH112DN-T1-GE3 Crowbar MOSFET +* NLSV1T34 Level shifter +* NCP1117 SOT223 3.3V voltage regulator + +At the the time of writing most of these components appear to be available or easily replaceable. +The cost for all components on the PCB at low volume should be less than 25 EUR. + +## Optional improvements before building the PCB +* Add a pull-down resistor on the `IN A` pin of the MCP1405 MOSFET driver. +* Modify the locations of the castellated holes in `interposer_footprint.kicad_mod`. Currently the rightmost castellated holes are not conveniently located, see the mounting instructions. +* Do some additional routing such that the RP2040 can monitor eMMC D0 and UART at the same time. \ No newline at end of file diff --git a/pcb/gerbers_modchip.zip b/pcb/gerbers_modchip.zip new file mode 100644 index 0000000..8877b56 Binary files /dev/null and b/pcb/gerbers_modchip.zip differ diff --git a/pcb/ibom.html b/pcb/ibom.html new file mode 100644 index 0000000..fd77a3c --- /dev/null +++ b/pcb/ibom.html @@ -0,0 +1,4345 @@ + + + + + + + Interactive BOM for KiCAD + + + + + + +
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Board statsFrontBackTotal
Components~~~
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SMD pads~~~
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b/pcb/interposer_symbol.kicad_sym @@ -0,0 +1,40 @@ +(kicad_symbol_lib (version 20211014) (generator kicad_symbol_editor) + (symbol "interposer_conn" (in_bom yes) (on_board yes) + (property "Reference" "U" (id 0) (at 5.08 -1.27 0) + (effects (font (size 1.27 1.27))) + ) + (property "Value" "interposer_conn" (id 1) (at 5.08 20.32 0) + (effects (font (size 1.27 1.27))) + ) + (property "Footprint" "" (id 2) (at 0 0 0) + (effects (font (size 1.27 1.27)) hide) + ) + (property "Datasheet" "" (id 3) (at 0 0 0) + (effects (font (size 1.27 1.27)) hide) + ) + (symbol "interposer_conn_0_1" + (rectangle (start 0 19.05) (end 10.16 0) + (stroke (width 0.1524) (type default) (color 0 0 0 0)) + (fill (type none)) + ) + ) + (symbol "interposer_conn_1_1" + (pin input line (at 0 16.51 0) (length 2.54) + (name "VCore" (effects (font (size 1.27 1.27)))) + (number "1" (effects (font (size 1.27 1.27)))) + ) + (pin input line (at 0 10.16 0) (length 2.54) + (name "GND1" (effects (font (size 1.27 1.27)))) + (number "2" (effects (font (size 1.27 1.27)))) + ) + (pin input line (at 0 6.35 0) (length 2.54) + (name "GND2" (effects (font (size 1.27 1.27)))) + (number "3" (effects (font (size 1.27 1.27)))) + ) + (pin input line (at 0 2.54 0) (length 2.54) + (name "GND3" (effects (font (size 1.27 1.27)))) + (number "4" (effects (font (size 1.27 1.27)))) + ) + ) + ) +) diff --git a/pcb/schematic.pdf b/pcb/schematic.pdf new file mode 100644 index 0000000..bcff61d Binary files /dev/null and b/pcb/schematic.pdf differ -- cgit v1.2.3