Power net portal is a special schematic object used to define a power or ground net. Power ports allow you to conveniently indicate a power net at any location in the design. Power nets of the same designator automatically connect throughout your design #portal #power
A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #generics
Certainly! The AvocAudio project is a compact, multifunctional board designed primarily for tiny Machine Learning (tinyML) applications focused on audio data collection. The project integrates several components to achieve flexible, efficient data collection and wireless communication. Let's break down the key aspects and components of this project:
Key Features and Overall Description
Microcontroller: Raspberry Pi RP2040 serves as the core processing unit.
Connectivity: The board integrates a LoRa-E5 LoRaWAN Transceiver Module for long-range wireless communication.
Data Storage: It includes an SD card slot for local data storage.
Power: Designed to run on solar power or a lithium-ion battery, providing flexibility in power sources and ensuring efficient energy use.
Major Modules and ComponentsPower Management
Power Nets: Includes nets such as +3V3, VUSB, VBAT, and VSOLAR for managing different voltage levels and power sources.
Microcontroller and Associated Components
RP2040 Module1 (RP2040): Handles processing with multiple GPIO pins connected to different components such as sensors, SD card, and LoRa module.
LoRaWAN Module
LoRa-E5 (U6): Wireless transceiver module for LoRaWAN communication. Key connections are LORA_RX, LORA_TX, and LORA_NRST, facilitating data transmission and control signals.
Sensors and Peripherals
Temperature and Humidity Sensor (DHT11 or DHT22): Connected for environmental data collection.
Microphone (MK1): For collecting audio data, connected via pins like WS, SELECT, BCLK, VDD, and DATA_OUT.
SD Card Interface (J1): For local data storage, connected through various GPIO pins.
Key Connections
Power Connections:
Connect C20:P1 to +3V3:P1
Connect MK1:VDD to +3V3
Connect C20:P2 to GND
Connect RP2040:GND to GND
LoRa Module (U6):
Connect RP2040:GPIO0 to LORA_RX
Connect RP2040:GPIO1 to LORA_TX
Connect RP2040:GPIO12 to LORA_NRST
Microphone (MK1):
Connect RP2040:GPIO10 to MIC_SDA
Connect RP2040:GPIO18 to MIC_WS
Connect MK1:VDD and MK1:GND for power and ground
SD Card (J1):
Connect RP2040:GPIO18 to SD_CMD
Connect RP2040:GPIO19 to SD_DATA0
Connect RP2040:GPIO21 to SD_DATA2
Connect RP2040:GPIO22 to SD_DATA3
Additional Notes and Constraints
The project has several design constraints and layout notes to ensure proper functionality:
C11 Capacitors: Should be placed close to pin 45 of the RP2040 to minimize noise.
RF Filter Capacitors (C27): Should be closest to the microphone to filter out unwanted frequencies.
One-Wire Protocol: Relies on a pull-up resistor when not actively transmitting. Essential for some of the sensor communication.
Final Thoughts
This project is well-suited for TinyML applications with an emphasis on low power consumption, thanks to its solar power and battery options. The integration of components like the LoRaWAN transceiver and SD card slot allows for real-time data collection and remote data transmission, making it ideal for remote monitoring applications.
Let me know if you need more detail on any specific section or component.
11mo
C28
Capacitance
100n F
+3V3
VUSB
J5
R15
Resistance
10k Ω
Can connect a DHT11 or DHT22 Sensor
SWCLK
LORA_NRST
R10
Resistance
470 Ω
J2
SD_DATA1
DHT_DATA
SD_CLK
LORA_TX
One-Wire protocol relies on the bus being pulled high by the pull-up resistor when not actively transmitting
LORA_RX
MIC_WS
R9
Resistance
10k Ω
C20
Capacitance
10u F
SD_DATA3
USB_D-
SD_DATA3
MIC_WS
+3V3
LoRa MODULE
VBAT
+3V3
SD_DATA0
VSOLAR
TEMP & HUMIDITY CIRCUIT
SWD
R20
Resistance
50 Ω
VSOLAR
R23
Resistance
27.4 Ω
SD_DATA0
SD_CMD
+3V3
USB_D+
SD_DATA1
VBAT
+1V1
LORA_NRST
SD_CLK
+3V3
SD_DATA2
LORA_TX
+3V3
RF filter capacitors, C27, should be the closest to the microphone
Use Copilot to brainstorm projects, search the library, place and connect components, and more. Click a prompt or write your own to get started. Learn More
Explain
Write Project Description
Find Issues
Test Plan
Passive Components
Decoupling Capacitors
Beta
IC:Pin
Net Name
U7:VCC
+3V3
Resistor Power Rating
Beta
Checks that the power traveling across a given resistor is under its rating with 50% headroom.
collinsemasi
copilot
+3V3
,VUSB
,VBAT
, andVSOLAR
for managing different voltage levels and power sources.LORA_RX
,LORA_TX
, andLORA_NRST
, facilitating data transmission and control signals.WS
,SELECT
,BCLK
,VDD
, andDATA_OUT
.C20:P1
to+3V3:P1
MK1:VDD
to+3V3
C20:P2
toGND
RP2040:GND
toGND
RP2040:GPIO0
toLORA_RX
RP2040:GPIO1
toLORA_TX
RP2040:GPIO12
toLORA_NRST
RP2040:GPIO10
toMIC_SDA
RP2040:GPIO18
toMIC_WS
MK1:VDD
andMK1:GND
for power and groundRP2040:GPIO18
toSD_CMD
RP2040:GPIO19
toSD_DATA0
RP2040:GPIO21
toSD_DATA2
RP2040:GPIO22
toSD_DATA3