Project Overview and Design Analysis

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C2
Capacitance
100nF
C4
Capacitance
100nF
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
C3
Capacitance
100nF
C7
Capacitance
100nF
EXTERNAL FLASH CIRCUIT
D2
Color
Green
User LED for blinking and testing the board
C24
Capacitance
10uF
LoRa MODULE
Pull up resistors
Line 1
R6 and r9 are are pull ups for the SD Card line
Line 2
Line 2
Termination resistors
C8 Should be close to pin 44 of RP2040
MICROCONTROLLER
C11 Should be close to pin 45 of RP2040
C22
Capacitance
4u7 F
SD CARD CIRCUIT
C23
Capacitance
100nF
R10
Resistance
470 Ω
R19
Resistance
1k5 Ω
R9
Resistance
10kΩ
R4
Resistance
1kΩ
R2
Resistance
27.4 Ω
R18
Resistance
1kΩ
R16
Resistance
50 Ω
R17
Resistance
50 Ω
R1
Resistance
27.4 Ω
R3
Resistance
10kΩ
R6
Resistance
10kΩ
SW1
SW2
J4
U1
J1
U2
U6

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