Curious-C Beeper tool

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Curious-C Beeper tool

Postby matseng » Sun Nov 04, 2012 11:39 pm

I just started soldering up the Curious-C Beeper. So far I just put in the "battery holders" :-)

It's actually more like a battery clip since I've made it out of the outer loop of a regular steel paper clip. Putting a small blob of solder on the bottom pad will make the connection between the pcb and the battery more reliable - I always do this, even when using real button cell holders.

Links for the Curious-C Beper:
http://www.vk2zay.net/article/266 (Video)
http://www.dangarcia.info/o3index/wurds/C_b.htm (Schematics)
https://github.com/SmallRoomLabs/Curious-C (Eagle files)

Curious-C_BatteryClips.jpg
Button cell holder made out of a paper clip
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Re: Curious-C Beeper tool

Postby Markus Gritsch » Mon Nov 05, 2012 2:57 am

Beautiful. I really like this idea. The big plastic surroundings of off-the-shelf coin battery holders always annoy me.
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Re: Curious-C Beeper tool

Postby systemstech » Mon Nov 05, 2012 7:16 am

Those battery holders are a excellent idea, what I call K.I.S.S. engineering. :)
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Re: Curious-C Beeper tool

Postby Sjaak » Mon Nov 05, 2012 9:42 am

BTW no trouble soldering the paperclip?
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Re: Curious-C Beeper tool

Postby matseng » Mon Nov 05, 2012 9:58 am

Nope, not problems at all. I set the iron at 310C/590F and used a tiny dab of soldering flux paste. But the way it flowed at the top I'd say that that it would have worked just fine without the flux.
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Re: Curious-C Beeper tool

Postby Markus Gritsch » Mon Nov 05, 2012 10:44 am

matseng wrote:Putting a small blob of solder on the bottom pad will make the connection between the pcb and the battery more reliable

Have you seen this?
http://www.thingamafob.com/pcb-design-k ... connected/

Here, the solder mask around the battery is removed to improve the contact.
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Re: Curious-C Beeper tool

Postby matseng » Mon Nov 05, 2012 10:51 am

That is definitely a nice idea, I'll do that in my next coin cell battery project....
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Re: Curious-C Beeper tool

Postby dolabra » Mon Nov 05, 2012 6:28 pm

out of curiosity, what size drill works well for a paper clip?
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Re: Curious-C Beeper tool

Postby matseng » Mon Nov 05, 2012 9:11 pm

Well, these holes are 1.3mm (51 mil) but according to my nifty test-pcb's this brand of paper clip can fit into a 0.9mm (35 mil) hole.

TestBoards.jpg
PCB Test boards - two versions


I'm sure the pcb fab house hate doing these boards since they have like 20 different hole sizes and changing the drill bit size is a very costly operation on the machines. :-)
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Re: Curious-C Beeper tool

Postby tayken » Mon Nov 05, 2012 9:49 pm

Hey, I have the one on the left on my key chain! :)

And a quick tip: Last year, when I designed a badge for THS, I used the metal coin cell holder to hold a safety pin. That way you can attach it to your shirt. The thing is, the battery keeps it in place so you can loose it when you are changing the battery if you are not carefuly. :)
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Re: Curious-C Beeper tool

Postby matseng » Mon Nov 05, 2012 9:59 pm

tayken wrote:Hey, I have the one on the left on my key chain! :)

That's cool. So you were at the Hack-in-the-box conference in Kuala Lumpur last year then? I did the right pcb 2-3 years ago, then the local hackerspace here wanted something to sell at HITB so I made a new version of it with their name for them and donated 50 of them to the space for selling.
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Re: Curious-C Beeper tool

Postby tayken » Mon Nov 05, 2012 11:26 pm

Nope, some visitors brought a bunch of them to THS and I got mine from there. It should be right after the conference.
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Re: Curious-C Beeper tool

Postby dolabra » Tue Nov 06, 2012 12:47 am

oh, yeah I have one of those boards from itead..... I'll have to test my brand of clip.
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Re: Curious-C Beeper tool

Postby matseng » Tue Nov 06, 2012 1:11 am

dolabra wrote:oh, yeah I have one of those boards from itead

Can you upload pics of the front & back of the board?
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Re: Curious-C Beeper tool

Postby Sjaak » Tue Nov 06, 2012 5:16 am

matseng wrote:
dolabra wrote:oh, yeah I have one of those boards from itead

Can you upload pics of the front & back of the board?


It was on our blog: http://dangerousprototypes.com/2011/12/ ... t-arrives/

Are those gerbers available of your test pcbs? I think they are of use to compare different pcb services.
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