HardLabs

ESP-EVB

OLIMEX·ESP32-EVB·HARDWARE/REV-D/ESP32-EVB_Rev_D.kicad_pcb

ESP-EVB PCB layout, top view — open source ESP32 board by OLIMEX
Simulate this board

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 2-layer board measuring 75.2 × 74.7 mm, with 145 components from 61 distinct parts.

Its main chip is the ESP-WROOM-32, from the ESP32 family. Other key parts include the MCP73833(MSOP10), SY8089AAAC(SOT23-5), LAN8710A-EZC(QFN32), CH340T(SSOP20W) and MCP2551-I/SN(SOIC-8_150mil). By type, the board carries 58 resistors, 28 capacitors, 10 ICs, 7 LEDs, 6 transistors and 6 diodes.

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)SY8089AAAC(SOT23-5)ESP-WROOM-32LAN8710A-EZC(QFN32)CH340T(SSOP20W)MCP2551-I/SN(SOIC-8_150mil)RPM7236-H8BD5230G-TR(SSOP5/SOT-23-5)BAT54C(SOT23-3)

ESP-EVB bill of materials (BOM)

145 components, 61 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MCP73833(MSOP10)
U1
1
SY8089AAAC(SOT23-5)
U2
1
ESP-WROOM-32
U3
1
LAN8710A-EZC(QFN32)
U4
1
CH340T(SSOP20W)
U5
1
MCP2551-I/SN(SOIC-8_150mil)
U6
1
RPM7236-H8
U7
1
BD5230G-TR(SSOP5/SOT-23-5)
U8
2
BAT54C(SOT23-3)
U9, U10
5
BC817-40(SOT23)
Q1, Q2, Q4, Q5, Q7
1
Q12MHz/20pF/30ppm/2P/HC-49SM(SMD)
Q3
2
TB3 DG306-5.0-3P
CON1, CON2
1
Closed(1-2)/Opened(2-3)
5.0V/3.3V1
1
Closed
400MA_E1
1
DW02R
BAT1
2
T1107A(6x3,8x2,5MM)
BUT1, RST1
1
TB3-3.5mm
CAN1
2
Opened
CAN_T1, PHY_RST1
1
Q50MHz/25ppm/3V/4P/5x3.2mm
CR1
1
NA(HN2x20)
EXT1
Show 41 more
QtyPartRefs
2
WPM2015-3/TR
FET1, FET2
2
Mounting_hole_Shield_3.3mm
MH2, MH3
1
TFC-WXCP11-08-LF
MICRO_SD1
1
PWRJ-2mm(YDJ-1134)
PWR1
1
NA(TB2 DG306-5.0-2P)
PWR2
2
RAS-0515
REL1, REL2
3
RA1206_(4X0603)_4B8_2.2k
RM1, RM2, RM3
1
BH10S
UEXT1
1
MISB-SWMM-5B-LF(USB_MICRO)
USB-UART1
1
LED/YELLOW/0603
CHARGING1
3
LED/GREEN/0603
COMPLETE1, LED1, LED2
1
LED/IR333-A/5mm
LED3
2
LED/RED/0603
PWRLED1, PWR_GOOD1
3
1N5819S4(SOD-123)
D1, D3, D5
1
SMBJ6.0A(DO-214AA)
D2
2
1N5822/SS34/SMA
D4, D6
3
FB0805/600R/2A
L1, L3, L4
1
2.2uH/1.5A/DCR<0.1R/CD32
L2
5
47uF/6.3V/20%/X5R/C0805
C1, C2, C3, C4, C10
7
22uF/6.3V/20%/X5R/C0603
C5, C6, C7, C8, C9, C12, C23
9
100nF/50V/20%/Y5V/C0603
C11, C13, C14, C15, C17, C24, C25, C27 +1
1
2.2uF/6.3V/10%/X5R/C0603
C16
2
10uF/6.3V/20%/X5R/C0603
C18, C26
1
1nF/2000V/10%/X7R/C1206
C19
1
NA(1nF/2000V/10%/X7R/C1206)
C20
2
27pF/50V/5%/C0G/C0603
C21, C22
8
1k/R0603
R1, R5, R12, R24, R41, R42, R55, R57
12
10k/R0603
R2, R6, R13, R22, R23, R29, R30, R34 +4
8
2.2k/R0603
R3, R4, R7, R9, R11, R15, R18, R21
3
4.99k/1%/R0603
R8, R10, R19
5
220R/R0603
R14, R16, R35, R37, R40
6
NA/R0603
R17, R44, R46, R48, R54, R58
1
1.1k/1%/R0603
R20
1
0R(board_mounted)
R25
4
330R/R0603
R26, R27, R50, R51
4
49.9R/1%/R0603
R28, R31, R32, R33
2
10R/R0603
R36, R43
1
12.1k/1%/R0603
R39
1
120R/R1206
R47
1
680R/R0603
R52
1
6.8R/R1206
R53

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 75.2 × 74.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ESP-EVB?

145 components, from 61 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.

More boards in ESP32-EVB

Similar boards