3
Component
Label
Value / Type / Label
Quantity
Resistors
R1, R2
1K
Ω
/ (Brown, Black, Black, Brown)
2
R3
120Ω
/ (Brown, Red, Black, Black)
1
R4
5.1Ω
/ (Green, Brown, Black, Silver)
1
RW
10KΩ Potentiometer
1
Light Emitting Diode
D1
5mm Red
1
D2
5mm Green
1
Zener Diode
D3
1N4148
1
Relay
JK
HK23F-DC5V-SHG Subminiature High Power Relay
1
IC Chips and Sockets
U1
NE555
1
----
DIP8 socket
1
Switches and
Connectors
S1
Single Row, Double Throw
1
J1
2.1mm DC Barrel Female Connector
1
PCB
----
Tin Plated, Green Soldermask, White Silkscreen
1
Modules
MQ-3
MQ3 Sensor
1
B1
Buzzer
1
Bill of Materials:
This package includes 16 pieces which are listed below along with their labels and quantity.
