This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.

Monday, July 13, 2015

DOD 280 Compressor

The DOD 280 was DOD's first compression pedal made in the late '70s through the '80s. A great sounding compressor, this fairly simple circuit uses an LDR and LED combination (in the form of a VTL5C2) to compress the signal. This one's laid out for on board right angle PCB pots, mounted from the solder side as per usual). I've added polarity protection and power filtering, as well as an input pull down resistor. You can use a VTL5C9 or CLM6000, or a good ol' 1M dark resistance LDR and an LED in heat shrink in place of the original VTL5C2.




8 comments:

  1. If I'm gonna use it and it'll stay always on, I don't need a switch anymore, do I?

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    Replies
    1. In theory, I guess you wouldn't have to build it with a switch. If it were me though, I would at least install an on/off toggle switch (DPDT). Or at the very least test it with your rig before boxing it up.

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  2. hi, brother.is the real image size to transfer in the pcb?

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    Replies
    1. Use the one in the Transfer Image Library. See the tab at the top of the page. It'll be in the DOD folder

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  3. it works, but the compression pot is reversed

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  4. shouldnt pins 1 and 2 of comp pot be tied together instead of 2 and 3?

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