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16 Ways to Switch your AC Power On

16 Ways to Switch your AC Power On
16 Ways to Switch your AC Power On

Connect this microcontroller controlled switch between an ordinary AC Power On/Off switch and the load, and you have 24 (say, sixteen) ways available for managing how and when the load actually gets powered.

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Materials

Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.

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PCB

Component list

Resistors
R1 = 1.5kOhm 1W (115VAC: 750Ohm)
R2,R3 = 1MOhm (115VAC: 470kOhm)
R4,R5,R6 = 330Ohm
Capacitors
C1 = 0.33µF 250VAC, MKP (115VAC: 0.68µF) (see text)
C2 = 1000µF 63V radial
C3 = 100nF
C4 = 10nF class X1/Y2
Semiconductors
D1 = 4.3V 0.5W zener diode
D2 = BAT85
IC1 = ATtiny13-20PU, programmed, Elektor # 100443-41
TRI1 = BT136
Miscellaneous
K1,K2 = 2-way PCB screw terminal, pitch 7.5mm
SW1 = 4-way DIP switch block
PCB # 100443-1

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