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optical tack got flaky

#255748 by reible » Fri Jan 11, 2019 7:24 pm

When I was using my optical tachometer the other day it seemed a little flaky and I traced it down to the battery connection.

IMG_2415rsmc.jpg
IMG_2415rsmc.jpg (167.71 KiB) Viewed 556 times


It uses a 9 volt battery and the one connector was not getting a nice tight fit on the battery post. So I replaced the clip with a new one but since I had it open to work on I thought I would post a picture of what it looks like inside.

IMG_2416rsc.jpg
IMG_2416rsc.jpg (214.77 KiB) Viewed 556 times


And all that for less then $10.......

Ed

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{Knight of the Shopsmith} [Hero's don't wear capes, they wear dog tags]

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Re: optical tack got flaky

#255751 by jsburger » Fri Jan 11, 2019 7:31 pm

reible wrote:When I was using my optical tachometer the other day it seemed a little flaky and I traced it down to the battery connection.

$matches[2]

It uses a 9 volt battery and the one connector was not getting a nice tight fit on the battery post. So I replaced the clip with a new one but since I had it open to work on I thought I would post a picture of what it looks like inside.

IMG_2416rsc.jpg

And all that for less then $10.......

Ed


Interesting, it looks like a crystal at the bottom of the IC. We used them in HAM radio equipment years ago to set frequencies.

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John & Mary Burger
Eagle's Lair Woodshop
Hooper, UT

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Re: optical tack got flaky

#255760 by JPG » Fri Jan 11, 2019 9:19 pm

jsburger wrote:
reible wrote:When I was using my optical tachometer the other day it seemed a little flaky and I traced it down to the battery connection.

$matches[2]

It uses a 9 volt battery and the one connector was not getting a nice tight fit on the battery post. So I replaced the clip with a new one but since I had it open to work on I thought I would post a picture of what it looks like inside.

IMG_2416rsc.jpg

And all that for less then $10.......

Ed



Interesting, it looks like a crystal at the bottom of the IC. We used them in HAM radio equipment years ago to set frequencies.



Really! I guess it needs an accurate time reference! :rolleyes:

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Re: optical tack got flaky

#255782 by dusty » Sat Jan 12, 2019 2:02 pm

reible wrote:When I was using my optical tachometer the other day it seemed a little flaky and I traced it down to the battery connection.

$matches[2]

It uses a 9 volt battery and the one connector was not getting a nice tight fit on the battery post. So I replaced the clip with a new one but since I had it open to work on I thought I would post a picture of what it looks like inside.

IMG_2416rsc.jpg

And all that for less then $10.......

Ed


And still available for about $13.

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"Making Sawdust Safely"
Dusty
Sent from my Microsoft Surface Pro using Firefox.

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