raspberry pi can bus hat
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# can-hat
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can hat design for raspberry pis
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The canonical repo for this is hosted on tangled over at [`dunkirk.sh/can-hat`](https://tangled.org/dunkirk.sh/can-hat)
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## BOM
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| Component | LCSC # | Qty | Placement |
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|---|---|---|---|
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| MCP2518FDT-H/SL | C626759 | 3 | Hand solder |
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| MCP2562FDT-E/SN | C511335 | 3 | Hand solder |
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| OVETGLJANF-40MHZ | C295515 | 3 | Hand solder |
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| AT24C32D-SSHM-T | search LCSC | 1 | Hand solder |
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| 100nF 0603 X7R | basic | ~10 | PCBA |
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| 10µF 0805 | basic | 2 | PCBA |
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| 120Ω 0603 | basic | 3 | PCBA |
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| 10kΩ 0603 | basic | 6 | PCBA |
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| 3.9kΩ 0603 | basic | 2 | PCBA |
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| 15EDGVC-3.5-02P (header) | search Degson | 3 | Hand solder |
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| 15EDGKNM-3.5-02P (plug) | search Degson | 3 | Wire side |
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| 2×20 stacking header | — | 1 | Hand solder |
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| Name | Purpose | Quantity | Total Cost (USD) | Distributor |
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|---|---|---|---|---|
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| [2×20 40-pin stacking female header](https://www.amazon.com/dp/B0827THC7R) | 15-16mm pin length to clear Pi 5 active cooler, hand solder | 1 | $9.90 | Amazon |
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| [10kΩ 0603](https://www.lcsc.com/product-detail/C25803.html) | MCP2518FD RESET pull-up and MCP2562FD STBY pull-down, PCBA | 100 | $0.18 | LCSC |
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| [1kΩ 0603](https://www.lcsc.com/product-detail/C21190.html) | EEPROM write-protect pull-up to 3.3V, PCBA | 100 | $0.16 | LCSC |
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| [3.9kΩ 0603](https://www.lcsc.com/product-detail/C23196.html) | EEPROM SDA/SCL pull-ups to 3.3V, PCBA | 100 | $0.16 | LCSC |
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| [120Ω 0603](https://www.lcsc.com/product-detail/C25879.html) | CAN bus termination resistors, one per channel, PCBA | 100 | $0.09 | LCSC |
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| [10µF 0805](https://www.lcsc.com/product-detail/C15850.html) | Bulk caps for 3.3V and 5V rails, PCBA | 20 | $0.43 | LCSC |
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| [100nF 0603 X7R](https://www.lcsc.com/product-detail/C14663.html) | Decoupling caps for all ICs, PCBA | 100 | $0.30 | LCSC |
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| [15EDGRC-3.5-02P (plug & header)](https://www.lcsc.com/product-detail/C5632692.html) | PCB-side right-angle pluggable terminal block, 3.5mm pitch, 2-pin, hand solder | 10 | $3.21 | LCSC |
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| [AT24C32D-SSHM-T](https://www.lcsc.com/product-detail/C60583.html) | 32Kbit I2C EEPROM for HAT ID, SOIC-8, hand solder | 5 | $1.48 | LCSC |
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| [OVETGLJANF-40MHZ](https://www.lcsc.com/product-detail/C295515.html) | 40MHz active oscillator, 3.3V, SMD5032-4P, hand solder | 11 | $6.14 | LCSC |
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| [MCP2562FDT-E/SN](https://www.lcsc.com/product-detail/C511335.html) | CAN FD transceiver with VIO pin, SOIC-8, hand solder | 11 | $12.87 | LCSC |
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| [MCP2518FDT-H/SL](https://www.lcsc.com/product-detail/C626759.html) | CAN FD SPI controller, SOIC-14, hand solder | 11 | $27.07 | LCSC |
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The AT24C32D write-protect pin should have a jumper pad or test point so it can be pulled low to flash, then left pulled high permanently after.
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