Dc metro
About the Dc metro PCB
Dc metro is an open source ESP8266 PCB design by JWehle, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 457.2 × 457.2 mm, with 282 components from 22 distinct parts.
Its main chip is the C82891, from the ESP8266 family. Other key parts include the C84681, C7843 and TLV70233DBVR. By type, the board carries 207 diodes, 50 capacitors, 11 resistors, 6 test points, 4 ICs and 3 transistors.
From the project
An upscaled version of the DCTransistor board.
This repository holds the files used to design and manufacture the DCTransistor boards themselves.
DCTransistor_updated.svg is an InkScape project file containing the PCB artwork (i.e. map design). The map is the inkscape file used on the most recent (Bidirectional) version of the boards.
The original Inkscape file used to create the first production DCTransistor board run is still available at DCTransistor_orig.svg
Main components on the Dc metro
Dc metro bill of materials (BOM)
282 components, 22 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | C84681 CH340C | SOIC-16_3.9x9.9mm_P1.27mm | U0 |
| 1 | C82891 ESP-12F | ESP-12E | U2 |
| 1 | C7843 SN74LVC1T45DBV | SOT-23-6_Handsoldering | U3 |
| 1 | TLV70233DBVR | SOT-23-5 | U4 |
| 2 | C20526 MMBT3904 | SOT-23-3 | Q0, Q1 |
| 1 | AOD403 | TO-252-2 | Q2 |
| 1 | C165948 USB_C_Receptacle | USB_C_Receptacle_GSB1C4621DS2HR | J0 |
| 6 | 5016 | TestPoint_Keystone_5016_Compact | TP0, TP1, TP2, TP3, TP4, TP5 |
| 207 | C5349955 SKC6812RV | LED_SK6812_PLCC4_5.0x5.0mm_P3.2mm_no_silk | D2, D3, D4, D5, D6, D7, D8, D9 +199 |
| 2 | C14663 0.1uF | C_0603_1608Metric | C0, C2 |
| 41 | C15525 10uF | C_0603_1608Metric | C1, C3, C5, C6, C7, C8, C9, C10 +33 |
| 1 | C15525 150uF | CP_EIA-7343-43_Kemet-X_Pad2.25x2.55mm_HandSolder | C4 |
| 1 | 10uF | C_0603_1608Metric | C44 |
| 3 | 150uF | CP_EIA-7343-43_Kemet-X_Pad2.25x2.55mm_HandSolder | C45, C46, C47 |
| 2 | 0.1uF | C_0603_1608Metric | C48, C49 |
| 1 | C25905 5.1K | R_0603_1608Metric | R0 |
| 2 | C25117 12K | R_0603_1608Metric | R1, R2 |
| 1 | C25905 12K | R_0603_1608Metric | R3 |
| 2 | C25752 499 | R_0603_1608Metric | R4, R5 |
| 3 | C25744 12K | R_0603_1608Metric | R6, R7, R9 |
Show 2 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | C25102 499 | R_0603_1608Metric | R8 |
| 1 | 5.1K | R_0603_1608Metric | R10 |
Dc metro design files
The KiCad project lives in the JWehle/dc-metro-pcb repository on GitHub; these links point at the commit this page was built from.
Dc metro: common questions
What microcontroller does the Dc metro use?
The Dc metro is built around the C82891, from the ESP8266 family.
How big is the Dc metro PCB?
The Dc metro measures 457.2 × 457.2 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Dc metro?
282 components, from 22 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 Dc metro design files?
From the JWehle/dc-metro-pcb 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 Dc metro design in my own project?
Yes, under the terms of its Apache-2.0 license, which JWehle chose for the repository.
Can I test firmware for the Dc metro without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP8266 firmware against it before you order a PCB.
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