Easy Home Control

Happens to everyone! You’re comfortably installed on your sofa watching TV and then all of a sudden you need to get up to turn the lights on or off, or to draw the curtains. Many living rooms these days have a double head-up ceiling light, a floor lamp and an electric window/curtain control. The idea is to control all these devices, and more, with the TV remote control. The circuit designed for maximum indolence in front of the telly is built around the PIC16F84.

Resistors

R1= 5-way 10k SIL array

R2-R6 = 1k

Capacitors

C1,C2 = 22pF

C3 = 100nF

Semiconductors

D1= LED, low current

D2-D5 = 1N4148

IC2 = IR receiver module, e.g., TSOP1836, SFH5110 or TK1833

T1-T4 = BC547

Miscellaneous

X1 = 4MHz quartz crystal

IC1 = PIC16F84, programmed, order code 050233-41 (see Elektor SHOP pages or website)

PCB, ref. 050233-1 from The PCB Shop

Re1-Re4 = PCB mount relay, 5V coil, 140mA.