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3D View

Schematic of Keypad lock reference design
U1
MOSI
MISO
SCK
Q1
ROW_3
RESET
+5V
COL_3
COL_1
RESET
ROW_4
ROW_2
+5V
+5V
BUZZER
MOSI
ROW_1
+5V
ROW_1
SCK
+5V
LED_G
RESET
ROW_3
LED_R
COL_2
MISO
ISP
LED_G
COL_1
+5V
ROW_2
COL_2
LED_R
+5V
ROW_4
+5V
COL_3
BUZZER
R5
Resistance
150 Ω
C2
Capacitance
4.7uF
C7
Capacitance
1uF
C6
Capacitance
1uF
RED
R4
Resistance
150 Ω
RST
C5
Capacitance
22uF
C1
Capacitance
120pF
GREEN
C4
Capacitance
22uF
R3
Resistance
2.2kΩ
BZ1
C8
Capacitance
0.1uF
R2
Resistance
10kΩ

Keypad lock reference design