Home › Magazines › 2006 › July › Multicolour HD LED

Multicolour HD LED

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Published in issue 356, July 2006

Most PC enclosures provide only a single LED to indicate hard disk access, with the LED being connected to the motherboard via a two-pin connector. However, this LED only works with IDE drives, and if a SCSI disk controller is fitted, its activity will not be visibly noticeable. This small circuit remedies that problem using a multicolour LED.

Components

Resistors:

R1,R3 = 10k

R2,R4 = 560

Semiconductors:

D1 = Dual LED with 3 pins (Conrad Electronics # 187496)

IC1,IC2 = CNY17-2

T1,T2 = BC547B

Miscellaneous:

K1 = 4-way SIL connector

Small disk drive connector for PCB mounting, or solder pins (see text)

PCB, order code 030117-1 from the PCBShop

Click below to download a PDF copy of this article from Elektor magazine.

	Downloads
	PDF Article (030117-UK.pdf)
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	PCB layout (030117-PCB.pdf)
	10 Elektor Credits
	Order from Elektor
	PCB
	030117-1

Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.

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Multicolour HD LED

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Multicolour HD LED

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