Elektor Team
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IoT Shield for Arduino

IoT Shield for Arduino
This handy Arduino Uno R3 compatible shield is intended for simple control applications in and around the house. Wires to and from the shield [1] can be connected with a screwdriver – no soldering is required. When the system is connected to the Internet, the label “Internet of Things” (IoT) becomes applicable.
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Component list
Component List
All 5%, 0.25 W
R1, R3 = 1kOhm
R2 = 100kOhm
P1 = 100kOhm, trimpot, horizontal
P2 = 10kOhm, trimpot, horizontal
C1 = 100nF, 0.2’’ pitch
D1 = BZX85C, 3.3 V, 1.3 W Zener diode
IC1 = MCP6232
IC2 = ULN2003
JP1, JP2 = pinheader, 2-way, 0.1’’ mm pitch
2 pcs jumper for JP1 and JP2
K1,K2,K3,K4,K5,K6,K7 = 3-way PCB screw terminal block, 5 mm pitch
K8, K10 = 8-way stackable pinheader socket, SIL, 0.1’’ mm pitch
K11 = 10-way stackable pin socket, SIL, 0.1’’ mm pitch
IC socket, DIP-8 for IC1
IC socket, DIP-16 for IC2
PCB # 149014-1 v1.1
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