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Line AC Switch Controlled by Bluetooth Low Energy

Line AC Switch Controlled by Bluetooth Low Energy
This article describes the electronics, the BL600 program and the Android program; the last being an Android smartphone application with which your mains switch circuit may be controlled wirelessly. You may notice an unusual detail for these pages — the transformerless power supply.
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Download the BOM list
The BOM (Bill of Materials) is the technically exhaustive listing of parts and other hardware items used to produce the working and tested prototype of any Elektor Labs project. The BOM file contains deeper information than the Component List published for the same project in Elektor Magazine. If required the BOM gets updated directly by our lab engineers. As a reader, you can download the list here.
Want to learn more about our BOM list? Read the BOM list article for extra information.
Component list
Component List
R1,R2 = 330Ohm 1W
R3,R5,R6 = 220Ohm 0.25W
R4 = 1kOhm 0.25W 250V
R7,R8 = 4.7MOhm carbon film 0.25W 250V
C1 = 470nF 275 VAC, 22.5mm pitch (for 230 VAC)
C1 = 1µF 275 VAC 22.5 mm pitch (for 115 VAC)
C2 = 100µF 50 V radial
C3,C4 = 100nF 50V
LED1 = LED, red, 3mm
LED2 = LED, blue, 3mm
D1,D3,D4,D5 = 1N4007
D2 = BZX85C6V8 (6.8V 1W zener diode)
T1 = BS170
Tri1 = BT138-V
IC1 = LP2950-33
IC2 = MOC3041M
F1 = fuse, 1A slow-blow 20mm
Fuseholder, 5x20 mm (1162740)
K1,K2 = 2-way PCB screw terminal 0.3’’ (7.68mm), 630V rated (1793006)
MOD1 = BL600 e-BoB, ready assembled, ElektorSTORE # 140270-91
Case = Hammond 1591BTCL (transparent) (1877127) or 1591BGY (grey), 112x62x31 mm (4437019)
PCB adapters for case (1876930)
PG7 cable gland (Lapp Cable) (1178859)

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