Hardware mod for running OEPL on ESLs
About the Hardware mod for running OEPL on ESLs PCB
Hardware mod for running OEPL on ESLs is an open source PCB design by OpenEPaperLink, published on GitHub. It is a 2-layer board measuring 29.2 × 38.1 mm, with 18 components from 17 distinct parts.
Other key parts include the MCP73831, TPS70936, MX25R1635FM1XX0 and E104-BT53. By type, the board carries 4 ICs, 4 connectors, 3 capacitors, 3 resistors, 2 diodes and 1 transistor.
It belongs with the displays & leds and power & battery designs in this gallery.
From the project
Hardware files for the OpenEpaperLink project
The stock shelf label is infrared-based, and the protocol has been analyzed by other folks before me. However, for supporting OpenEpaperLink we need 2.4GHz IEEE 802.15.4-based connectivity. Thus, the modchip.
I have spent hours trying to reverse the PCB and firmware running on the chip, ending up having to build a live-surgery setup considering the stock firmware for these is in RAM. That means that when you remove the batteries, the firmware is gone. Yay. The end result is a functional hardware mod with a workable understanding of how to drive the display, which (bonus points!) fits inside…
Main components on the Hardware mod for running OEPL on ESLs
Hardware mod for running OEPL on ESLs bill of materials (BOM)
18 components, 17 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MCP73831 | SOT-23-5 | U1 |
| 1 | TPS70936 | SOT-23-5 | U2 |
| 1 | MX25R1635FM1XX0 MX25R1635FM1xx0 | SOP-8_3.9x4.9mm_P1.27mm | U4 |
| 1 | E104-BT53 | E104-BT53 | U5 |
| 1 | NVR1P02 | SOT-23 | Q1 |
| 1 | BAT | JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J1 |
| 1 | USB_B_Micro | USB_Micro-B_Molex_47346-0001 | J2 |
| 1 | Mini-Simplicity | PinHeader_2x05_P1.27mm_Vertical_SMD | J3 |
| 1 | PWR_IN | JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J4 |
| 1 | TestPoint | TestPoint_THTPad_D1.5mm_Drill0.7mm | PA6 |
| 1 | LED | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | SBR80520 | D_SOD-123 | D2 |
| 2 | 4.7U 4.7u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2 |
| 1 | 100N 100n | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3 |
| 1 | 2K2 2k2 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 680R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | 6k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
Hardware mod for running OEPL on ESLs design files
The KiCad project lives in the OpenEPaperLink/Hardware repository on GitHub; these links point at the commit this page was built from.
Hardware mod for running OEPL on ESLs: common questions
How big is the Hardware mod for running OEPL on ESLs PCB?
The Hardware mod for running OEPL on ESLs measures 29.2 × 38.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Hardware mod for running OEPL on ESLs?
18 components, from 17 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Hardware mod for running OEPL on ESLs design files?
From the OpenEPaperLink/Hardware repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Hardware mod for running OEPL on ESLs design in my own project?
The repository has no license, so all rights stay with OpenEPaperLink. Use it as a reference, and ask the author before reusing the design.
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