Schematic of Basic ATMEGA328
C3
Capacitance
100nF
C1
Capacitance
100nF
X1
Not Recommended for New Designs
U1
C5
Capacitance
18pF
R1
Resistance
10kΩ
C4
Capacitance
100nF
C2
Capacitance
100nF
C6
Capacitance
18pF