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Mail Archives: geda-user/2015/07/21/13:34:49

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Date: Tue, 21 Jul 2015 10:34:21 -0700
From: Larry Doolittle <ldoolitt AT recycle DOT lbl DOT gov>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] [OT] I need help with selecting components
Message-ID: <20150721173421.GA20472@recycle.lbl.gov>
References: <1507211704 DOT AA02900 AT ivan DOT Harhan DOT ORG>
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SF -

On Tue, Jul 21, 2015 at 05:04:29PM +0000, Spacefalcon the Outlaw wrote:
> 1. A pushbutton switch for power-on and reset buttons.

Like DJ, I like the parts that Digi-Key categorizes as Tactile Switches
(6069 items).

>    And if someone here has
>    used such a pushbutton switch in his/her boards and already has a
>    vetted PCB footprint for it, that would be ever more awesome. :)

E-Switch TL1105AF100Q, over 12000 on the shelf at Digi-Key,
PCB footprint attached.

> 2. A simple LED that shines upward from the board.  Again, I'm looking
>    for the kind of LED one would expect to see on a random chip
>    vendor's eval board that is meant to be used bare on a lab bench,
>    without fitting to any enclosure or chassis.  Ditto regarding a PCB
>    footprint to go with it.

Just use standard 1206, 0805, or even 0603 footprints.
Here's one simple on-the-shelf 1206 part: Lumex SML-LX1206GC-TR.
I've started moving to smaller sizes.

> 3. What would be a "good" or "reasonable" connector to use for
>    connecting a lab bench power supply?

Somehow I got in the habit of using MTA-156 connectors for this.
It does require you to have and use a crimping tool for the cable
end, but it's simple, cheap, "transparent", maintainable, robust, ...
Lots of options in pin count.  Friction lock is good.

TE 644752-2 (tin) $0.25 in 1's
TE 641119-2 (gold) $0.97 in 1's

  - Larry

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	Pin[ -12795 8858 7000 1200 7600 4000 "2" "2" 0x00000000]
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