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Joined: 12/14/2007(UTC)
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Hi.
Do you have a schematic handy for the relay board Brian used in the Opus that was featured in the Head-fi forum thread?
I thought having a single rotary selector/power switch was a nice idea and I would like to borrow it if you don't mind. :d/
Thanks
-Bored.
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Here it is. PDFs of the copper and silk (fixed errors in original board). You can connect two I2S sources, with a single output. The transistor is a BC546, resistor is 1K-10K, diode is a 1n400x. Relays are 5Volt Omron G6H or equivalent. Connect 5VDC to the + and G terminals. Put your switch between G and B. Shorting G and B will throw the relays and select source 2. In my DAC, I connected USB to source 2 and S/PDIF to source 1, then used VBUS from the USB receiver for power. This way, if there is no USB source connected, you cannot select USB, and S/PDIF input stays active (input 1). There are a million ways to do it though. You could also set the PS for your S/PDIF receiver to 5V and share power with it. Edited by user Sunday, December 16, 2007 9:58:34 AM(UTC)
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Rank: Member
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Joined: 12/14/2007(UTC)
Posts: 2
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I am afraid your artwork raised a few more questions then it answered. ;)
How did you switch the power?
I assume the BC546 was just a jellybean and any nPn I have handy will work there?
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