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athenacyan565512

Explain this project in detail. Describe its purpose, core components, and how they interact. Break down the design, implementation, and functionality step by step. Highlight key technologies, dependencies, and design choices, including trade-offs and optimizations. Discuss potential challenges, performance considerations, and real-world applications. If applicable, suggest areas for improvement, scalability, and future enhancements.
C2
Capacitance
100nF
C28
Capacitance
100nF
C4
Capacitance
100nF
C14
Capacitance
27pF
C20
Capacitance
10uF
C12
Capacitance
100nF
C13
Capacitance
27pF
C1
Capacitance
100nF
C10
Capacitance
100nF
C26
Capacitance
100nF
C9
Capacitance
100nF
C5
Capacitance
100nF
C6
Capacitance
100nF
C25
Capacitance
100nF
C11
Capacitance
1uF
C8
Capacitance
1uF
C27
Capacitance
100pF
C3
Capacitance
100nF
C7
Capacitance
100nF
C17
Capacitance
10uF
MIC_SCL
QSPI_SD0
QSPI_SS
SD_DATA1
LORA_RX
LORA_NRST
SD_CLK
QSPI_SD2
SD_CMD
MIC_WS
QSPI_SD1
SD_DATA3
USB_D-
XOUT
LORA_RX
LORA_NRST
C24
Capacitance
10uF
SD_DATA0
C18
Capacitance
100nF
XIN
~USB_BOOT
QSPI_SS
SD_CMD
MIC_SDA
QSPI_SD3
SD_CLK
C29
Capacitance
100nF
LORA_TX
SD_DATA2
C19
Capacitance
68pF
SD_DATA2
C15
Capacitance
10uF
DHT_DATA
LORA_TX
SD_DATA1
QSPI_SCLK
USB_D-
QSPI_SD1
C21
Capacitance
100nF
C16
Capacitance
4u7 F
C22
Capacitance
4u7 F
XOUT
SD_DATA0
DHT_DATA
XIN
MIC_SDA
SD_DATA3
QSPI_SD2
QSPI_SCLK
QSPI_SD3
MIC_SCL
QSPI_SD0
USB_D+
MIC_WS
USB_D+
C23
Capacitance
100nF
EXTERNAL FLASH CIRCUIT
+3V3
D2
Color
Green
VUSB
D1
J5
R15
Resistance
10kΩ
Can connect a DHT11 or DHT22 Sensor
User LED for blinking and testing the board
R10
Resistance
470 Ω
R19
Resistance
1k5 Ω
One-Wire protocol relies on the bus being pulled high by the pull-up resistor when not actively transmitting
Cl = 2(Ccap_load - Cstray)
R9
Resistance
10kΩ
SOLAR POWER INTERFACE
R14
Resistance
6k8 Ω
R8
Resistance
15kΩ
VBAT
R13
Resistance
68kΩ
VUSB
VBAT
+3V3
VSOLAR
LoRa MODULE
R4
Resistance
1kΩ
VSOLAR
TEMP & HUMIDITY CIRCUIT
R2
Resistance
27.4 Ω
POWER CIRCUIT
Pull up resistors
Line 1
R6 and r9 are are pull ups for the SD Card line
Line 2
Line 2
Termination resistors
+3V3
+3V3
R18
Resistance
1kΩ
C8 Should be close to pin 44 of RP2040
R11
Resistance
1k5 Ω
Q1 Disconnects SOLAR input when both SOLAR and USB are connected. NOTE: This is a depletion type mosfet
MICROCONTROLLER
R16
Resistance
50 Ω
VBAT
+1V1
D4
Color
Red
+3V3
+1V1
+3V3
C11 Should be close to pin 45 of RP2040
RF filter capacitors, C27, should be the closest to the microphone
+3V3
Iset = 6800 / Rset = 1A
R17
Resistance
50 Ω
R7
Resistance
2kΩ
R12
Resistance
50 Ω
R1
Resistance
27.4 Ω
I_ch = (Vset / Rset) * 900 = 900mA
MICROPHONE CIRCUIT
+1V1
R5
Resistance
5kΩ
+3V3
R3
Resistance
10kΩ
R6
Resistance
10kΩ
+3V3
+3V3
SD CARD CIRCUIT
+3V3
+3V3
+3V3
USB INTERFACE
+3V3
D5
Color
Green
J2
SW1
J6
J3
U3
Q1
MK1
U5
SW2
L2
Inductance
2u2 H
U1
Y1
J1
U2
U6
U4
J4

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Documents

    Documents are markdown text files which describe project goals, capture details, or even simulation outputs.

    Assets

    oshw-logo.svg

    oshw-logo.svg

    oshw-logo
    microphone.svg

    microphone.svg

    microphone
    flux logo.svg

    flux logo.svg

    flux logo
    Test Asset v4.svg

    Test Asset v4.svg

    Test Asset v4
    ESD_(Susceptible).svg

    ESD_(Susceptible).svg

    ESD_(Susceptible)
    microphone v2.svg

    microphone v2.svg

    microphone v2
    ESD_(Susceptible) v2.svg

    ESD_(Susceptible) v2.svg

    ESD_(Susceptible) v2
    AvocAudio v1.svg

    AvocAudio v1.svg

    AvocAudio v1Default
    AvocAudio 24 V1.svg

    AvocAudio 24 V1.svg

    AvocAudio 24 V1

    AvocAudio - Fully Placed 23ab 7515

    AvocAudio is a compact tinyML community board designed for extensive audio data collection for various tinyML applications. It leverages the Raspberry Pi RP2040 and integrates a LoRa-E5 LoRaWAN Transceiver Module for connectivity. Equipped with an SD card slot for local data storage, the board ensures efficient data collection. The board operates on solar power or a lithium-ion battery, ensuring flexible and efficient energy use. #audioDevices #raspberryPi #rp2040 #lorawan #iot #solar

    Properties

    creativecommons.org/licenses/by/4.0/

    Scientific

    RoHS

    3.3

    LoRaWAN

    Buttons

    Microphone, Temperature sensor, Humidity sensor

    SD Card

    Audio

    Pricing & Availability

    Distributor

    Qty 1

    Arrow

    $12.52–$21.85

    Digi-Key

    $13.48–$17.44

    LCSC

    $34.90–$36.03

    Mouser

    $18.31–$18.54

    Verical

    $2.72–$5.04

    Controls