Elektor Team
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Bluetooth Controlled Relays

with Android App to go

Bluetooth Controlled Relays
A friend who knew I was handy with a soldering iron asked if I was willing and able to make a remote controller to operate his three (!) garage doors. I came up with this simple idea to control some relays via Bluetooth using an Android app.
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Component list
Component List
R1,R2, R3 = 100Ohm
R4,R5,R6 = 220Ohm
C1,C2 = 1µF, 0.2’’ pitch
D1 = 1N4007
D2,D3,D4 = 1N4148
LED1,LED2, LED3 = LED, 5mm, green
T1,T2,T3 = BS170
IC1 = MCP1700-3302E/TO (Microchip)
IC2 = ATtiny85-20PU, programmed, Elektor Store #150648-41 [1]
RE1,RE2,RE3 = 5V coil, 230VAC, 1A contacts (IMO Precision Controls UA2-5NU)
K1 = DC adaptor socket, 2.5mm center pin
K2 = 6-way socket for pinheader (1x6)
K3,K4,K5 = 2-way PCB screw terminal block, 5mm pitch
HC-06 Bluetooth module (JY-MCU V1.5)
PCB # 150648-1v1.3 or ELPB-NG prototyping board (150180-1)
Firmware 150648-11 [1]
Android App, free from Google Play Store [2]
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