U2
R7
Resistance
1KΩ
C3
Capacitance
4.7uF
R3
Resistance
22 Ω
L1
Inductance
22uH
C2
Capacitance
10uF
D1
C1
Capacitance
10uF
R2
Resistance
1KΩ
R6
Resistance
2KΩ
R1
Resistance
1KΩ
BT1
LED1
J2
U3
U4
IC1
GND
VBAT
U5
3V3