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MEOW System Integration

andrewgond·M.E.O.W-Mealtime-Electronic-Observation-and-Weighing·MEOW_System_Integration/MEOW_System_Integration.kicad_pcb

MEOW System Integration PCB layout, top view — open source ESP32 board by andrewgond
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About the MEOW System Integration PCB

MEOW System Integration is an open source ESP32 PCB design by andrewgond, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 140.3 × 98.7 mm, with 35 components from 23 distinct parts.

Its main chip is the ESP32_38pin, from the ESP32 family. Other key parts include the LM2596S-5, LM2596S-3.3 and A4988. By type, the board carries 7 connectors, 5 capacitors, 5 resistors, 3 ICs, 3 diodes and 2 jumpers.

It belongs with the sensors designs in this gallery.

From the project

M.E.O.W. automated pet feeder, a system that dispenses food and logs pet weight using load cells and RFID identification. The goal is to support long-term tracking of pet health trends such as obesity, malnutrition, or abnormal feeding behavior.

An Open-Source Smart Pet Feeder with Integrated Weight Tracking Senior Design Capstone — Oregon State University Andrew Gondoputro Ahmad Alajmi *Craig Kelley

This repository documents the development of the M.E.O.W. automated pet feeder, a system that dispenses food and logs pet weight using load cells and RFID identification. The goal is to support long-term tracking of pet health trends such as obesity, malnutrition, or abnormal feeding behavior.

Main components on the MEOW System Integration

LM2596S-5LM2596S-3.3A4988

MEOW System Integration bill of materials (BOM)

35 components, 23 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
~
MCU1
1
LM2596S-5
U1
1
LM2596S-3.3
U2
1
A4988
A1
1
MEM2090-00-145-00-A
Conn_01x04_Pin
J1
2
CONN_01X19_PIN
Conn_01x19_Pin
J8, J10
1
CONN_01X04_PIN
Conn_01x04_Pin
J9
1
CONN_01X04_PIN
Conn_01x04_Pin
J11
2
CONN_01X02_PIN
Conn_01x02_Pin
J12, J15
3
Terminal Out (Screw)
- 3.3v +, - 5v +, - 12v +
1
Power Connector
JP1
1
Power Switch Connector
JP2
1
RDM6300
RDM1
2
SEN-13879
S1, S2
1
MEM2090-00-145-00-A
SD1
3
1N5820
D1, D2, D3
1
68 uH
L1
1
47UH
47uH
L2
1
470 uF
C1
1
1UF
1uF
C2
Show 3 more
QtyPartRefs
2
220 uF
C3, C4
1
0.1UF
0.1uF
C5
5
10KOHM
10kohm
R1, R2, R3, R4, R5

MEOW System Integration design files

The KiCad project lives in the andrewgond/M.E.O.W-Mealtime-Electronic-Observation-and-Weighing repository on GitHub; these links point at the commit this page was built from.

MEOW System Integration: common questions

What microcontroller does the MEOW System Integration use?

The MEOW System Integration is built around the ESP32_38pin, from the ESP32 family.

How big is the MEOW System Integration PCB?

The MEOW System Integration measures 140.3 × 98.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the MEOW System Integration?

35 components, from 23 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 MEOW System Integration design files?

From the andrewgond/M.E.O.W-Mealtime-Electronic-Observation-and-Weighing 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 MEOW System Integration design in my own project?

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

Can I test firmware for the MEOW System Integration 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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