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Schematic

Layout

3D View

F1
C4
Capacitance
22pF
U1
Manufacturer Part Number
ATTINY841-SSU
C1
Capacitance
100nF
C5
Capacitance
22pF
C2
Capacitance
1uF
R6
Resistance
3.3 Ω
R18
Resistance
2.2KΩ
LED4
POWER
R21
Resistance
10KΩ
LED3
R3
Resistance
6.8KΩ
R2
Resistance
1KΩ
R14
Resistance
510 Ω
R1
Resistance
500 Ω
R12
Resistance
3.3 Ω
TX
J2
R26
Resistance
3.3 Ω
R16
Resistance
2.2KΩ
RX
D2
R4
Resistance
2.7KΩ
R30
Resistance
3.3 Ω
R25
Resistance
3.3 Ω
EXTTEMP1
R5
Resistance
220 Ω
R8
Resistance
3.3 Ω
R29
Resistance
3.3 Ω
R22
Resistance
3.3 Ω
R24
Resistance
3.3 Ω
R20
Resistance
10KΩ
R15
Resistance
10KΩ
R17
Resistance
2.2KΩ
REMOTE
R19
Resistance
10KΩ
H1
D1
End of Life
R23
Resistance
10KΩ
Y1
U2
H3
Q1
H2

BMS