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DCTransistor standard

LArkema·dctransistor-project·board_files/DCTransistor_standard.kicad_pcb

DCTransistor standard PCB layout, top view — open source ESP8266 board by LArkema
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About the DCTransistor standard PCB

DCTransistor standard is an open source ESP8266 PCB design by LArkema, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 304.8 × 304.8 mm, with 169 components from 18 distinct parts.

Its main chip is the C82891, from the ESP8266 family. Other key parts include the C84681, C6186 and C7843. By type, the board carries 107 diodes, 43 capacitors, 10 resistors, 4 ICs, 2 transistors and 2 connectors.

From the project

DC metro map and train status indicator, but on PCB (aka Washington Metro Area Transistor Authority)

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 DCTransistor standard

C84681C6186C82891C7843

DCTransistor standard bill of materials (BOM)

169 components, 18 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
C84681
CH340C
U0
1
C6186
AMS1117-3.3
U1
1
C82891
ESP-12F
U2
1
C7843
SN74LVC1T45DBV
U3
2
C20526
MMBT3904
Q0, Q1
1
C165948
USB_C_Receptacle
J0
1
Conn_02x01
J1
1
C54948
SW_SPST
SW0
1
C191023
SOD-323
D0
1
SOD-323
D1
105
C5349955
WS2812B
D2, D3, D4, D5, D6, D7, D8, D9 +97
2
C14663
100nf
C0, C2
41
C15525
10uF
C1, C3, C4, C5, C6, C7, C8, C9 +33
2
C25905
5.1kR
R0, R3
2
C25117
470
R1, R2
2
C25752
12k
R4, R5
3
C25744
10k
R6, R7, R9
1
C25102
300R
R8

DCTransistor standard design files

The KiCad project lives in the LArkema/dctransistor-project repository on GitHub; these links point at the commit this page was built from.

DCTransistor standard: common questions

What microcontroller does the DCTransistor standard use?

The DCTransistor standard is built around the C82891, from the ESP8266 family.

How big is the DCTransistor standard PCB?

The DCTransistor standard measures 304.8 × 304.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the DCTransistor standard?

169 components, from 18 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 DCTransistor standard design files?

From the LArkema/dctransistor-project 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 DCTransistor standard design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

Can I test firmware for the DCTransistor standard 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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