<div dir="auto">A heat camera can prove useful for design as well. <div dir="auto"><br></div><div dir="auto">We had been thinking about getting one for the office for a couple of years, but couldn't really justify the need of it. There are such a lot of nice devices that you'd like to have in your perfectly working environment in theory, but can also do without - and this felt like one of those. <div dir="auto"><br></div><div dir="auto">However, at one point in time we jumped the gun and ordered a FLIR heat camera (of a more regular camera-like type than the model linked above). We looked at a new prototype PCB just for fun, didn't really have any plan for sharp use of the camera at the moment since we were just re-doing some old and trusted circuits on a MkII version of an existing product - what could possibly go wrong? O:-)</div><div dir="auto"><br></div><div dir="auto">The first thing we saw was an extremely hot spot in the power supply. Hmm, why is that resistor almost 100 degrees C? Back to the schematics, no obvious clue... Back to the MkI schematics, the same solution there... but no extreme hot spot indicated by the camera when looking at the old PCB. Oh, wait - on the old board the resistor was 0805 size, but in the new one it's a tiny 0402. Someone forgot to include that information in the design when re-drawing it! </div><div dir="auto"><br></div><div dir="auto">The little resistor that was supposed to dissipate a lot of HF energy in the switching-mode power supply actually burnt quite a bit of power, and if chosen physically too small it got way too hot. Also it was sitting very close to a much taller component, preventing us from reaching it with the fingertips when poking around on the PCB, so we would never have found this issue without a heat camera! </div><div dir="auto"><br></div><div dir="auto">So we thought we didn't need one, but got invaluable use of the camera within hours from getting it. All mainly due to human errors. That's something to learn from. :-)</div><div dir="auto"><br></div><div dir="auto">/mr</div><div dir="auto"><br></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Den lör 1 aug. 2020 23:45MTG <<a href="mailto:grant@musictechnologiesgroup.com">grant@musictechnologiesgroup.com</a>> skrev:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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Yeah, cheaper than those ABI chip testers. All really cool if repair
is a regular endeavour.<br>
<br>
GB<br>
<br>
<br>
<div>On 8/1/2020 2:36 PM, Eric Frampton
wrote:<br>
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<blockquote type="cite">
Not terrible. Not an impulse buy, but not terrible:
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<div><a href="https://www.amazon.com/dp/B00NXJDQV0/?coliid=I1LTVBM8BSLH8V&colid=3K4IMYVHD627T&psc=1&ref_=lv_ov_lig_dp_it" target="_blank" rel="noreferrer">https://www.amazon.com/dp/B00NXJDQV0/?coliid=I1LTVBM8BSLH8V&colid=3K4IMYVHD627T&psc=1&ref_=lv_ov_lig_dp_it</a></div>
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<blockquote type="cite">
<div>On Aug 1, 2020, at 5:29 PM, MTG <<a href="mailto:grant@musictechnologiesgroup.com" target="_blank" rel="noreferrer">grant@musictechnologiesgroup.com</a>>
wrote:</div>
<br>
<div>
<div>That's really neat. I'm guessing this isn't
a technology mere mortals can afford?<br>
<br>
GB<br>
<br>
On 8/1/2020 1:50 PM, Mike Beauchamp wrote:<br>
<blockquote type="cite">I'm also borrowing a
FLIR camera right now and took a picture of the
Prodigy PCB showing my finger under each oscillator's
LM3046. The dead one is easy to see, since it's
perfectly cold... very fun device :)<br>
</blockquote>
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