ESP32-S3 RLCD cYbErDeCk

by Kyle Smith · Medium · manifest draft — being verified

A low-power ESP32-S3 clamshell with a 4.2-inch reflective LCD, Rii Bluetooth keyboard and a print-ready enclosure.

Kyle Smith’s cYbErDeCk targets long runtime and outdoor readability rather than desktop-class compute. The design combines Waveshare’s reflective color LCD board with one 18650 cell, a removable keyboard and a compact printed shell offered with either a screwed back plate or an optional magnetic cover.

Original: github.com, github.com, github.com

Parts

Qty	Part	Buy
1×	Waveshare ESP32-S3-RLCD-4.2 reflective LCD board Repository BOM and assembly guide: Waveshare ESP32-S3-RLCD-4.2; explicitly not an e-paper or other ESP32-S3 display board.	Waveshare Amazon (budget)
1×	Rii 518 Bluetooth keyboard Repository BOM and mechanical design: Rii 518BT mini Bluetooth keyboard; explicitly not the K18 or RT518S.	Amazon (budget) eBay (budget)
1×	18650 Li-ion cell (maximum 18.6×69mm) Assembly guide: one flat-top or protected 18650 cell, no larger than 18.6mm diameter × 69.0mm long.	DigiKey Mouser
1×	8Ω 1W speaker with 2-pin MX1.25 lead Repository BOM: the speaker with MX1.25 two-pin lead supplied with the Waveshare board; only source a replacement if the included part is missing.	DigiKey Amazon (budget)
4×	M2×4mm brass heat-set insert, 3.2mm OD Repository BOM: four M2×4mm brass heat-set inserts with 3.2mm outside diameter.	DigiKey Amazon (budget)
4×	M2×6mm countersunk screw, ISO 10642 Repository BOM: four M2×6mm countersunk ISO 10642 screws between chassis and back plate; the guide explicitly rejects M2×8.	DigiKey Amazon (budget)
4×	M2.5×8mm countersunk machine screw Repository BOM: four M2.5×8mm countersunk ISO 10642 screws into the board standoffs.	DigiKey Amazon (budget)
1×	Thin adhesive foam gasket strip Repository BOM: one 0.5mm-thick adhesive foam gasket strip around the display aperture.	DigiKey Amazon (budget)
1×	microSD card optional Repository BOM lists one optional FAT32-formatted microSD card; capacity and speed class are not stated.	Adafruit Amazon (budget)
8×	5×2mm neodymium disc magnet optional Repository BOM: eight 5×2mm N52 magnets only for optional cover variant 2; four in the shell and four in the cover.	Adafruit Amazon (budget)

Printed parts

Chassis, back plate, button sprue and optional magnetic cover — Official print-ready STL set in the repository. The project is licensed MIT; the creator states that no part has yet been physically printed or fitted.

Notes

README, assembly guide, OpenSCAD source tree and MIT license checked at source commit abc5f675cbdc449ef4595d3de9505d04c1f81f67 on 2026-10-27. Kept draft because the creator explicitly says the design is in development, has not yet been physically built, and the keyboard function-key matrix remains untested.

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