please back off a bit, I'm just learning. ![]() you asked me in private message to ask the group and I did in a generic way to be respectful of your hard work. I'm just asking to learn, and not debating you. so no need to worry about confusing folks. Those will work with my 16pin->10pin cables, and also 10pin->16pin cables for my power supply which does not have the +5v and CV pins. ![]() I guess having this consistent also helps prevent having to twist the floating bus which would take up more room in the case and could get messy if modules don't all have their key facing right.įrom now on, when I build new ribbon cables, I'll lay it flat on the desk with red wire at the bottom, and have both connectors facing down with keys facing to the right. It's easy to check several connected modules too since having a red wire at the top would be a flag something is not connected right. ( one key under the ribbon cable ) This will also 'hint' to prevent connecting in reverse since I'll always build my modules to have the -12v/red pin at the bottom with key facing right. I guess it makes sense that all the ribbon cables I get from TipTop and other modules have both connectors with their key facing right. I messed this up on an early PCB I made, so now I remember well For a bit of extra fun confusion: if you plan to optionally use angled headers somewhere, keep in mind that they have the key-cutout on top. If you now mentally rotate this to look at the top entry of the header with the key-cutout on the right, pin 1 is at the bottom right. The red wire should indicate pin 1, and when looking at an IDC box shrouded header from the key-cutout side, or at the plug from the key-elevation side, pin 1 is front left. The cable itself might extend in one direction or the other, depending on how it was made in order to accommodate the PCB layout of the module in question, but as long as the key is rightward facing in relation to the -12V line being at the bottom, you'll see no issues in powering your module." ![]() "So which way is correct for keyed cables and shrouded headers? When looking directly at the back of the module and referencing the Doepfer power specification with -12V placed on the bottom row of pins, the tab or slot of the connector or shrouded header should be pointing to the right. I also found this on which seems to confirm the key must be facing the right: I ask because all of my TipTop cables and flying buses connect correctly to the power supply if it is keyed to the right, but not when keyed to the left.īefore I confirm the DIY power board keyed to the left is incorrect, I wanted to confirm. Can anyone confirm this is correct? I have received a DIY power board KIT and its key points to the left and want to confirm it should point to the right? If I look at the Eurorack power connector on back of the module, I understand that the -12v red wire should be at the bottom, and the key should point to the right. I'm building a Eurorack power supply board.
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