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B.C.I.-Design

BMiller8008·B.C.I.-Design·Schematics/OurStuff/ECE477/ECE477.kicad_pcb

B.C.I.-Design PCB layout, top view — open source ESP32 board by BMiller8008

About the B.C.I.-Design PCB

B.C.I.-Design is an open source ESP32 PCB design by BMiller8008, published on GitHub. It is a 2-layer board measuring 105 × 41 mm, with 62 components from 41 distinct parts.

Its main chip is the ESP32-WROOM-32E, from the ESP32 family. Other key parts include the CP2102N-Axx-xQFN28 and USBLC6-2SC6. By type, the board carries 20 resistors, 9 test points, 9 capacitors, 7 diodes, 4 connectors and 3 ICs.

From the project

Purde ECE477 Senior Design

This is an example schematic from Ben Miller's Senior Design Team.

The board uses an ESP32, CP2102N usb-uart bridge, and a Pololu Buck Converter

I recomend using a EXTERNAL BRIDGE - to reduce complexity if hand soldering

You also could use a LDO rather than a buck converter, but the buck will be more power efficient

Main components on the B.C.I.-Design

ESP32-WROOM-32ECP2102N-Axx-xQFN28USBLC6-2SC6

B.C.I.-Design bill of materials (BOM)

62 components, 41 distinct parts.

QtyPartRefs
1
ESP32-WROOM-32E
U1
1
CP2102N-Axx-xQFN28
U2
1
USBLC6-2SC6
U3
2
SS8050-G
Q1, Q2
1
USB_B_Micro
J1
1
Barrel_Jack
J2
1
OLED JST PH 7pin
J3
1
D30V30F3
J7
1
Button 1
B1
1
Button 2
B2
1
Boot Button
Boot1
1
Debug Conn
Debug1
1
Conn_01x05_Socket
Mic_Conn1
1
RST Button
RST1
1
Bat TestPoint
TP1
1
GND 1
TP2
1
GND 2
TP3
1
GND 3
TP4
1
ADC
TP5
2
Power
TP6, TP9
Show 21 more
QtyPartRefs
1
Mic
TP7
1
VUSB
TP8
1
UART_Conn
UART1
1
ESDA6V1BC6
D1
1
Battery LED
D4
1
Power LED
D5
1
TX_LED
D6
3
RX_LED
D7, D8, D9
1
FerriteBead
FB1
2
10uF
C1, C5
6
0.1uF
C2, C3, C4, C6, C8, C9
1
22uF
C7
1
22.1K
R1
1
47.5k
R2
1
1k
R3
7
10k
R4, R8, R9, R10, R11, R12, R14
1
2k
R5
1
6M
R6
1
3M
R7
5
220
R13, R15, R16, R17, R18
2
0
R19, R20

B.C.I.-Design design files

The KiCad project lives in the BMiller8008/B.C.I.-Design repository on GitHub; these links point at the commit this page was built from.

B.C.I.-Design: common questions

What microcontroller does the B.C.I.-Design use?

The B.C.I.-Design is built around the ESP32-WROOM-32E, from the ESP32 family.

How big is the B.C.I.-Design PCB?

The B.C.I.-Design measures 105 × 41 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the B.C.I.-Design?

62 components, from 41 distinct parts. The full bill of materials is listed on this page.

Where can I download the B.C.I.-Design design files?

From the BMiller8008/B.C.I.-Design repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the B.C.I.-Design design in my own project?

The repository has no license, so all rights stay with BMiller8008. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the B.C.I.-Design without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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