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SMD

Hasatio·WaterQualityControl·prototype/SMD/SMD.kicad_pcb

SMD PCB layout, top view — open source ESP32 board by Hasatio
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About the SMD PCB

SMD is an open source ESP32 PCB design by Hasatio, published on GitHub. It is a 2-layer board measuring 69.2 × 55.6 mm, with 92 components from 33 distinct parts.

Its main chip is the QWIIC_RIGHT_ANGLE, from the ESP32 family. Other key parts include the PCA9685, DRV8870DDA, K7805-2000R3L, TCA9406DC and MCP23008-XSO. By type, the board carries 25 diodes, 16 jumpers, 10 connectors, 9 capacitors, 9 resistors and 8 ICs.

It belongs with the robotics & motion designs in this gallery.

From the project

The circuit taken as an example while designing the board Adafruit PCA9685

The circuit taken as an example while designing the board Adafruit PCA9685

- 1x TCA9406 (Voltage Level Translator) - 2x ADS1115 (Analog to Digital Converter) - 1x MCP23008 (I/O Expander) - 3x DRV8870 (Motor Driver) - 1x K7805-2000R3L or K7805-2000R3 for 5V supply - 2x QWIIC connector

Main components on the SMD

PCA9685DRV8870DDAK7805-2000R3LTCA9406DCMCP23008-XSOPC817

SMD bill of materials (BOM)

92 components, 33 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
PCA9685
U1
3
DRV8870DDA
L298P
U2, U3, U4
1
K7805-2000R3L
ADS1115IDGS
U5
1
TCA9406DC
ADS1115IDGS
U6
1
MCP23008-XSO
ADS1115IDGS
U7
1
PC817
L7805
U8
1
AOD417
Q1
6
TERMBLOCK_1X2
J1, J4, J5, J7, J8, J10
1
QWIIC_RIGHT_ANGLE
J2
1
TERMBLOCK_1X2
J11
1
TERMBLOCK_1X2
QWIIC_RIGHT_ANGLE
J12
1
TERMBLOCK_1X2
Conn_01x04
J13
6
~
JP1, JP2, JP5, JP6, JP15, JP16
2
PINHD-1X6CB
JP3, JP4
8
JUMPER-SMT_2_NC_TRACE_SILK
JP7, JP8, JP9, JP10, JP11, JP12, JP13, JP14
6
SOLDERJUMPERREFLOW_NOPASTE
SJ_A0, SJ_A1, SJ_A2, SJ_A3, SJ_A4, SJ_A5
6
TESTPOINTROUND1MM
TP1, TP2, TP3, TP4, TP5, TP6
1
GREEN
LED1
1
RED
LED2
24
M7
D1, D3, D4, D5, D6, D7, D8, D9 +16
Show 13 more
QtyPartRefs
1
Z1SMA4740
M7
D2
1
10UF
10uF
C1
1
1000UF/35V
1000uF
C2
3
0.1UF
1.0uF
C3, C4, C8
1
10UF/35V
1.0uF
C5
1
0.1UF
10uF
C6
1
0.1UF/35V
10uF
C7
1
0.1UF/35V
1.0uF
C9
2
10K/603X4
10K
R1, R2
1
10K
R3
1
1k
R4
1
250M/1W
470
R5
4
220R/603X4
220
R11, R12, R13, R14

SMD design files

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

SMD: common questions

What microcontroller does the SMD use?

The SMD is built around the QWIIC_RIGHT_ANGLE, from the ESP32 family.

How big is the SMD PCB?

The SMD measures 69.2 × 55.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the SMD?

92 components, from 33 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 SMD design files?

From the Hasatio/WaterQualityControl 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 SMD design in my own project?

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

Can I test firmware for the SMD 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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