22 lines
699 B
Markdown
22 lines
699 B
Markdown
---
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active: false
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tags: project
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created: 2026-03-08 20:25
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---
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## Goal
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Build an I2C based MFRC522 reader.
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- Use RJ45 connectors
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- Use DIP switches to set address
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## Tasks
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- [ ] Clone the SPI based board ➕ 2026-03-08
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- [ ] Redesign the SPI based board to be I2C ➕ 2026-03-08
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## References
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- [DIP Switches for Setting I2C address](https://www.ctscorp.com/Files/DataSheets/Switches/DIP-Switches/CTS-Switches-DIP-219-Series-Datasheet.pdf)
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- [DigiKey DIP switches](https://www.digikey.com/en/products/detail/cts-electrocomponents/219-5MST/223200)
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- [MFRC522 Data Sheet](https://www.nxp.com/docs/en/data-sheet/MFRC522.pdf)
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- [I2C Specification](https://www.nxp.com/docs/en/user-guide/UM10204.pdf)
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