Screw Terminals

DGTom · Posted: Tue Dec 01, 2009 6:47 pm Post subject:

tbh screw terminals are a little... clumsy, ok if you are leaving the electronics exposed or space is not a concern. .100 headers are a much better way of doing it IMO. I build all my proto. cct.s with rows of them on each side & have a bunch of Pots, Switches, LEDs etc. that just plug in for testing.

With bbobs board, if I wanted to keep hook-up flexiable I'd use the proto area as a bank of headers & link stuff into it with wires.

having the pads for power starve is great Very Happy

Inventor · Posted: Tue Dec 01, 2009 8:06 pm Post subject:

Inventor · Posted: Tue Dec 01, 2009 8:12 pm Post subject:

Here is a datasheet for the 0.100 center screw terminals that I'm talking about. I really believe these are quite the thing for Lunetta configurable interconnect, if a bit pricey. There are other styles available, IIRC, 45 degree and vertical perhaps. They look like they can hold two 24 ga wires each.

Les

ScrewTerminals_ENG_CD_282834_C.pdf

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Screw Terminals Datasheet

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Inventor · Posted: Tue Dec 01, 2009 8:18 pm Post subject:

Oh yes, and one more thing - you can have your cake and eat it too! By that I mean that a row of holes for screw terminals will also accept .100 headers and will also accept wires. You just have to make the holes the proper size to accept the screw terminals and you're good to go. So it's not an either-or choice but a both-and choice, which is a winner for everyone...

Les

DGTom · Posted: Tue Dec 01, 2009 8:44 pm Post subject:

oh I think they are really cool.

By "electronics exposed" I meant that the screw terminals seem better suited (to me) for devices like your sculptures which aren't inside an enclosure of some sort.

These:

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

& these;

are what I mean. Super-cheap & make assembly so, so easy.

You actually just touched on something that the screw terminals really have over these; multiple connections! Ideal in a lunetta world!!

Inventor · Posted: Wed Dec 02, 2009 12:28 pm Post subject:

I see both sides of the coin. On the one hand, Mathe is correct that you can do anything you want with those little eChucK breakout boards. And it is also true that many of us would like a nice Lunetta board for gifts or sharing with others.

Certainly if you're a Lunetta head you'll appreciate both approaches for different reasons. I'm inclined to make a LunettaBoard myself if someone would suggest a suitable design.

Also I'm wondering for the future about the next batch of eChucK breakout boards. They should have a smaller hole size and maybe another row or two I think. What are your suggestions?

Les

electri-fire · Posted: Wed Dec 02, 2009 12:52 pm Post subject:

Inventor · Posted: Wed Dec 02, 2009 1:03 pm Post subject:

Mahte, below is a layout on the eChucK Lunetta breakout board design for a 14 pin IC and power supply cap. You can make similar drawings with the design files in EAGLE CAD.

The reason I say that I'd like to make the boards a bit bigger is because this design doesn't really work for a 16 pin IC. We need one more row to do it right. That is, unless someone can come up with a more compact layout.

Your comments about the hole sizes ring true with me, they are big holes but you know what? Big holes are good. I might go just one size smaller and that's it.

Les

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Suggested Layout for bypass caps and power

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electri-fire · Posted: Wed Dec 02, 2009 1:48 pm Post subject: