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D2
D1
C3
Capacitance
10uF
R2
Resistance
Resistance
Resistance
5.1kΩ
C9
Capacitance
10uF
R4
Resistance
1kΩ
R3
Resistance
Resistance
Resistance
5.1kΩ
C5
Capacitance
10uF
C2
Capacitance
0.1uF
C1
Capacitance
0.1uF
PWR
USB1
Q1
U1
Q2
IC1

ESP-WROOM-02U Reference Design