About the article

Solid-state Turn Indicator

FET replaces relay

Solid-state Turn Indicator
Some motorcyclists not only enjoy tweaking the engine but also dabble in electronics. The author encountered problems with the mechanical turn indicator on his Harley Davidson bike and came up with an all-electronic alternative. As it turned out (pun intended) , the little circuit is very useful for cars, too.
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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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Component list
R1 = 1k?
R2,R3 = 150k?
R4 = 100k?
R5,R6 = 10k?
C1 = 100µF or 150µF, 16V, radial
C2 = 270nF
D1 = 1N4001
D1,D2 = 1N4148
T1 = IRFZ34N
T2,T3 = BC558
PCB, ref. 050120-1 from The PCBShop
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