[HN Gopher] Diagnosing video signal loss on Wii and GBS-Control
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Diagnosing video signal loss on Wii and GBS-Control
Author : zdw
Score : 54 points
Date : 2024-06-12 00:53 UTC (3 days ago)
(HTM) web link (nyanpasu64.gitlab.io)
(TXT) w3m dump (nyanpasu64.gitlab.io)
| zdw wrote:
| The level of debugging involved, all the way to the wallswitch in
| this was frankly impressive. I doubt most people would have dived
| that deep into an analog issue.
| Sakos wrote:
| I know a lot of the words here, but most of it sounds like
| gibberish. I wish I had the expertise and domain knowledge to be
| able to do something like this. It was a fantastic read and I'm
| awed by the author's dedication and level of knowledge.
|
| Unfortunately, as an enterprise software developer, my hardware
| proficiency stops at being able to assemble PCs and diagnose
| simple hardware issues (is this power supply broken?) at a very
| abstract level. I've encountered issues like this before and
| lacked the expertise to properly diagnose it on a low enough
| level, which can be frustrating.
| chongli wrote:
| If you have some free time you could always try taking up
| electronics as a hobby. Learn about Ohm's law and circuits,
| KVL/KCL, test equipment such as multimeters and oscilloscopes,
| alternating current, capacitors and inductors, relationships
| between frequency and impedance, Smith charts, spectrum
| analyzers, VNAs, oscillators, digital logic...
|
| Okay it sounds like a lot but if you have an hour or two to
| study per week you'd be surprised at how much you can learn in
| just a few years!
| jdietrich wrote:
| Electronics has the benefit of having one truly definitive
| textbook.
|
| https://artofelectronics.net/
| chongli wrote:
| And it has a lab course to go with it!
| atribecalledqst wrote:
| The lab course is getting harder to run since the parts
| in the BOM on the author website are being end-of-life'd.
| I ran into this when I started trying to run it as a
| self-study project a while ago. It wasn't always clear
| what parts you could use to replace them either...
|
| Also, the BOM itself doesn't have everything used in the
| course, so I sometimes found I needed to order something
| I hadn't anticipated needing. (the frustration with this
| ultimately caused me to drop it, maybe half-ish of the
| way through)
|
| This doesn't really negate your point, the lab course
| certainly still exists, I'm just not sure how amenable it
| is to run through as a self-study hobbyist.
| chongli wrote:
| It looks like some others on the eevblog forums have run
| into the same issues. I found a discussion on putting
| together a BOM for the second edition here [1].
|
| It seems like it would be a good community project to
| maintain an updated BOM of available parts for the lab
| course!
|
| [1] https://www.eevblog.com/forum/beginners/learning-the-
| art-of-...
| francis_t_catte wrote:
| it's likely not the dimmer's fault; phase angle triac dimmers
| were designed when resistive loads (incandescent light bulbs)
| were king. except for the super-low-wattage-per-lumen type, most
| LED light bulbs I run across these days are based capacitive
| dropper power supplies, which are inductive by nature (hence
| their atrocious power factor). combining that kind of load with
| phase-angle dimming is a recipe for crazy harmonics many orders
| of magnitude higher than the 60Hz base frequency.
| dfox wrote:
| I assume that design based on something like TPS92411 actually
| ends up being cheaper and more reliable than various series
| capacitor constructions, while being dimmable just fine and
| without spewing EMI. So it is just question of the OEMs having
| one 10 year old design and still using it.
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