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ESP-EVB

OLIMEX·ESP32-EVB·HARDWARE/REV-A/ESP32-EVB_Rev_A.kicad_pcb

ESP-EVB PCB layout, top view — open source ESP32 board by OLIMEX
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About the ESP-EVB PCB

ESP-EVB is an open source ESP32 PCB design by OLIMEX, published on GitHub under the Apache-2.0 license. It is a 4-layer board measuring 75 × 57.2 mm, with 105 components from 56 distinct parts.

Its main chip is the ESP-WROOM-32, from the ESP32 family. Other key parts include the MCP73833(MSOP10), SY8009AAAC(SOT23-5) and LAN8710A-EZC(QFN32). By type, the board carries 41 resistors, 20 capacitors, 6 LEDs, 5 diodes, 4 ICs and 4 inductors.

It belongs with the iot & wireless, power & battery and dev boards & breakouts designs in this gallery.

From the project

ESP32 WiFi / BLE Development board with Ethernet interface, Relays, microSD card

- revision A - internal, not released - revision B - initial public release - revision C - changes:

1. MicroUSB connector moved back, 40 mils to the middle of the board. 2. All mounting holes are now connected to GND. 3. Improved the ground layer around the infra red's pads and wires.

1. Changed R38 from 10k/0603 to 100k/0603 to lower the time without clock 2. Changed C28 from 100n/0603 to 10n/0603 to increase the time in reset

Main components on the ESP-EVB

MCP73833(MSOP10)SY8009AAAC(SOT23-5)ESP-WROOM-32LAN8710A-EZC(QFN32)

ESP-EVB bill of materials (BOM)

105 components, 56 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MCP73833(MSOP10)
U1
1
SY8009AAAC(SOT23-5)
U2
1
ESP-WROOM-32
U3
1
LAN8710A-EZC(QFN32)
U4
2
BC817-40(SOT23)
Q1, Q2
2
TB3 DG306-5.0-3P
CON1, CON2
2
Closed
400MA_E1, +5V_EN1
1
DW02R
BAT1
2
T1107A(6x3,8x2,5MM)
BUT1, BUT2
1
NA(Q50MHz/25ppm/3V/4P/5x3.2mm)
CR1
1
HN2x20
EXT1
1
IRLML6402
FET1
1
NA(5025)
FUSE1
2
Mounting_hole_Shield_3.3mm
MH2, MH3
1
TFC-WXCP11-08-LF
MICRO_SD1
1
Opened
PHY_RST1
1
PWRJ-2mm(YDJ-1134)
PWR1
1
NA(TB2 DG306-5.0-2P)
PWR2
2
RAS-0515
REL1, REL2
1
RA1206_(4X0603)_4B8_100k
RM1
Show 36 more
QtyPartRefs
2
RA1206_(4X0603)_4B8_4.7k
RM2, RM3
1
BH10S
UEXT1
2
LED/Red/0603
BAT_LOW1, PWRLED1
1
LED/YELLOW/0603
CHARGING1
3
LED/GREEN/0603
COMPLETE1, LED1, LED2
2
1N5819(S4 SOD-123)
D1, D3
1
SMBJ6.0A(DO-214AA)
D2
1
1N5822/SS34/SMA
D4
1
1N5819(S4SOD-123)
D5
3
FB0805/600R/2A
L1, L3, L4
1
2.2uH/1.5A/DCR<0.1R/CD32
L2
3
47uF/6.3V/20%/X5R/C0805
C1, C2, C10
1
470uF/10V/105C
C3
7
22uF/6.3V/20%/X5R/C0603
C4, C5, C6, C7, C8, C9, C12
5
100nF/50V/20%/Y5V/C0603
C11, C13, C14, C15, C17
1
2.2uF/6.3V/10%/X5R/C0603
C16
1
10uF/6.3V/20%/X5R/C0603
C18
1
1nF/2000V/10%/X7R/C1206
C19
1
NA(1nF/2000V/10%/X7R/C1206)
C20
3
1k/R0603
R1, R5, R12
7
10k/R0603
R2, R6, R22, R23, R24, R29, R38
8
2.2k/R0603
R3, R7, R9, R11, R15, R18, R21, R40
1
2.2k/R0402
R4
2
4.99k/1%/R0603
R8, R10
1
10k/0603
R13
5
220R/R0603
R14, R16, R26, R27, R41
1
NA
R17
1
4.99k/1%/R0402
R19
1
1.1k/1%/R0402
R20
1
0R(board_mounted)
R25
4
49.9R/1%/R0603
R28, R31, R32, R33
1
NA(10k/R0603)
R34
2
22R/R0603
R35, R43
1
NA(22R/R0603)
R36
1
NA(R0603)
R37
1
12.1k/1%/R0603
R39

ESP-EVB design files

The KiCad project lives in the OLIMEX/ESP32-EVB repository on GitHub; these links point at the commit this page was built from.

ESP-EVB: common questions

What microcontroller does the ESP-EVB use?

The ESP-EVB is built around the ESP-WROOM-32, from the ESP32 family.

How big is the ESP-EVB PCB?

The ESP-EVB measures 75 × 57.2 mm, has 4 copper layers and is 1.5 mm thick.

How many components are on the ESP-EVB?

105 components, from 56 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 ESP-EVB design files?

From the OLIMEX/ESP32-EVB repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the ESP-EVB design in my own project?

Yes, under the terms of its Apache-2.0 license, which OLIMEX chose for the repository.

Can I test firmware for the ESP-EVB 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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