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Old 02-13-2012, 02:12 AM #33
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Default Re: Help With Ophir Head and Panel Meter-1 Battery

Here's a fun question that would have been worth asking at the outset:

Where can I actually order a IQ0509S? Neither Mouser nor Digikey stock it...?!?


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Old 02-13-2012, 05:36 AM #34
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Default Re: Help With Ophir Head and Panel Meter-1 Battery

Design Engineer Community | Online Electronic Resources and Support Homepage - element14

Digi-Key - RY-0905D-ND (Manufacturer - RY-0905D)
looks like should work
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Old 02-13-2012, 05:51 AM #35
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Default Re: Help With Ophir Head and Panel Meter-1 Battery

Except that they have a minimum QTY of 25, and none are available anyway

I ended up getting them from Newark - which sucked because the order ended up costing like $29.
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Old 02-13-2012, 11:05 AM #36
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Default Re: Help With Ophir Head and Panel Meter-1 Battery

Some times you need to design around part availability
and the possible future discontinuation of that Part...

Besides the RY-0905D-ND part is 9Volts in and 5Volts
out... Not really what you want..

Jerry
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Old 02-13-2012, 12:09 PM #37
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Default Re: Help With Ophir Head and Panel Meter-1 Battery

RS components have a lot of them, too

Convertitori cc-cc | Compra Convertitori cc-cc con consegna in 24/48 ore | RS Components

I don't know if you can open the same pages i get from their site (they filter results by nations), anyway those are the part numbers i've found, for 5Vin -> +/-9Vout units, if you need to search them directly:

MEA1D0509SC
NMH0509DC
NKA0509SC
NMK0509SC
NMJ0509SC
NTV0509MC
NTA0509MC
NMA0509SC
NMH0509SC
NMV0509SC
RB-0509D

Almost all from Murata, except the last one from Recom.
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Old 04-05-2012, 08:26 PM #38
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Default Re: Help With Ophir Head and Panel Meter-1 Battery

Boy would I love some help

After the IQO509S twice arrived as the wrong part, I decided to go with Jib77's circuit found here:
Driver Circuit Thread

I'm starting to feel like the universe doesn't want me to have any better way of driving my Ophir than the 9V battery approach.

Because using Jib's circuit, I don't *really* get a split rail. I get -4.5V and +7.5V. I'm going to basically post my whole schematic and PCB (which, btw, anyone is free to use - assuming we can spot the fault, and it's useful to others).

Here are the exact parts use:
Digi-Key - 497-7171-5-ND (Manufacturer - BD437)
Digi-Key - BD438STU-ND (Manufacturer - BD438STU)
http://www.digikey.ca/scripts/DkSear...ds=LM358NFS-ND

And attached is the schematic and board.
Attached Files
File Type: zip Jib77 Dual Rail Ophir Supply.zip (66.2 KB, 37 views)
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Old 04-05-2012, 08:51 PM #39
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Default Re: Help With Ophir Head and Panel Meter-1 Battery

Yo, I have a 5V -> +/-12V DC/DC converter you can have if you want. Just pay shipping. >_>

Filter it with caps and Bob's your uncle.

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Old 04-05-2012, 08:53 PM #40
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Default Re: Help With Ophir Head and Panel Meter-1 Battery

Quote:
Originally Posted by Trevor View Post
Yo, I have a 5V -> +/-12V DC/DC converter you can have if you want. Just pay shipping. >_>

Filter it with caps and Bob's your uncle.

Trevor
I'll definitely take you up on that.

But I'd also really love to get ^ working.
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Old 04-23-2012, 04:14 PM #41
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Default Re: Help With Ophir Head and Panel Meter-1 Battery

Quick question -

Does anyone know off hand of a surface mount equivalent for the BD437 and BD438 transistors?

I've been looking at these two:

http://www.digikey.ca/product-detail...TFCT-ND/965650
http://www.digikey.ca/product-detail...FSCT-ND/965674
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Old 04-23-2012, 04:37 PM #42
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Default Re: Help With Ophir Head and Panel Meter-1 Battery

Quote:
Originally Posted by rhd View Post
Quick question -

Does anyone know off hand of a surface mount equivalent for the BD437 and BD438 transistors?

I've been looking at these two:

Digi-Key - KST42MTFCT-ND (Manufacturer - KST42MTF)
Digi-Key - MMBT5401FSCT-ND (Manufacturer - MMBT5401)
So, I would say the substitute of the BD437 could be the BD187 or the 2N5191.

And for the BD438 could be the BD188 or 2N5194.

But check it anyway.
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Old 04-23-2012, 04:54 PM #43
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Default Re: Help With Ophir Head and Panel Meter-1 Battery

Quote:
Originally Posted by piferal View Post
So, I would say the substitute of the BD437 could be the BD187 or the 2N5191.

And for the BD438 could be the BD188 or 2N5194.

But check it anyway.
That doesn't help a whole ton since I can't find the 2N5191 or 2N5194 in surface mount either

I would add that I don't actually need collector current to be up in the Amps. Something like 500mA should be more than sufficient, and the power doesn't need to be 40W either. A few W should be more than adequate.
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Old 04-23-2012, 05:00 PM #44
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Default Re: Help With Ophir Head and Panel Meter-1 Battery

Quote:
Originally Posted by rhd View Post
That doesn't help a whole ton since I can't find the 2N5191 or 2N5194 in surface mount either

I would add that I don't actually need collector current to be up in the Amps. Something like 500mA should be more than sufficient, and the power doesn't need to be 40W either. A few W should be more than adequate.
I see, I missed the "surface mount"

Between English and the fine print on my phone
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Old 04-23-2012, 05:12 PM #45
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Default Re: Help With Ophir Head and Panel Meter-1 Battery

Quote:
Originally Posted by piferal View Post
I see, I missed the "surface mount"

Between English and the fine print on my phone
It's all good
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Old 04-23-2012, 05:35 PM #46
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Default Re: Help With Ophir Head and Panel Meter-1 Battery

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Originally Posted by rhd View Post
It's all good
Look here, try looking through the filters, or directly in transistors listed below, there are 134 pages.

Maybe you find exactly what you want.

Edit: Well I guess you already know this anyway.
In SMD components I cannot help more, sorry.

Discrete Semiconductor Products | Transistors (BJT) - Single | Digi-Key

Last edited by piferal; 04-23-2012 at 05:42 PM.
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Old 04-23-2012, 05:45 PM #47
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Default Re: Help With Ophir Head and Panel Meter-1 Battery

Quote:
Originally Posted by piferal View Post
Look here, try looking through the filters, or directly in transistors listed below, there are 134 pages.

Maybe you find exactly what you want.

Edit: Well I guess you already know this anyway.
In SMD components I cannot help more, sorry.

Discrete Semiconductor Products | Transistors (BJT) - Single | Digi-Key
That's largely what I did to find these:
Digi-Key - KST42MTFCT-ND (Manufacturer - KST42MTF)
Digi-Key - MMBT5401FSCT-ND (Manufacturer - MMBT5401)

I just sort of need a sanity check, as I'm not terribly familiar with transistors myself. I want to make sure I'm not overlooking some obvious incompatibility.
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Old 04-23-2012, 11:30 PM #48
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Default Re: Help With Ophir Head and Panel Meter-1 Battery

Just do a parametric search on a manufacturers website (nxp, national semicondictor etc) to find a suitable transistor. I presume you do not need an exact equivalent, just something that meets or exceeds the specifications of the 437 and 438?
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