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Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: zen cycle <funkmasterxx@hotmail.com> Newsgroups: rec.bicycles.tech Subject: Re: For those who believe in electricity Date: Wed, 9 Apr 2025 06:53:17 -0400 Organization: A noiseless patient Spider Lines: 78 Message-ID: <vt5jiu$e6a9$2@dont-email.me> References: <vsvct9$2gcvj$1@dont-email.me> <vt1799$auke$1@dont-email.me> <vt3jpm$2jp43$6@dont-email.me> <vt3n23$24036$8@dont-email.me> <vt3rvn$2rlmv$2@dont-email.me> <vt3v81$24036$11@dont-email.me> <vt43le$331qo$1@dont-email.me> <vt4808$36m0q$1@dont-email.me> <vt48t5$36m0q$3@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Wed, 09 Apr 2025 12:53:19 +0200 (CEST) Injection-Info: dont-email.me; posting-host="cda66a8c2cfbed43c670762c4e03b5ec"; logging-data="465225"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18ACJLwSjeJiSt59BRCGgzmoMAo1sxdOZY=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:zNKyLaNcO5FBtzhijLdZZEPNNK4= In-Reply-To: <vt48t5$36m0q$3@dont-email.me> Content-Language: en-US On 4/8/2025 6:44 PM, Frank Krygowski wrote: > On 4/8/2025 6:29 PM, Frank Krygowski wrote: >> On 4/8/2025 5:15 PM, Frank Krygowski wrote: >>> On 4/8/2025 4:00 PM, Zen Cycle wrote: >>>> On 4/8/2025 3:04 PM, Frank Krygowski wrote: >>>>> On 4/8/2025 1:40 PM, Zen Cycle wrote: >>>>>> On 4/8/2025 12:44 PM, Frank Krygowski wrote: >>>>>>> On 4/7/2025 2:58 PM, Zen Cycle wrote: >>>>>> >>>>>>>> Just as a matter of personal interest, can you read the numbers >>>>>>>> off the 16 pin IC? >>>>>>> It has no numbers or other codes at all! It's solid black with a >>>>>>> sort of fine stippled finish. >>>>>>> >>>>>> >>>>>> Take another look. I can see 4 rows of text but the resolution on >>>>>> the picture isn't good enough to make it out. FWIW, it's the >>>>>> square device in your second picture with 4 solder joints on each >>>>>> side, next to the octagonal device with "220" written on it >>>>>> (that's a 220uH inductor, likely part of a PWM or PS switcher >>>>>> circuit). >>>>> >>>>> Sorry, Zen, it absolutely has no writing on it. I don't know if I >>>>> can manage a micro photograph to convince you, but I'm using a high >>>>> powered loupe in sunlight. It's just a stippled black finish. >>>>> >>>>> >>>> >>>> Try again, using this as a reference: >>>> >>>> https://1drv.ms/i/c/5c034a6b86a172e9/ >>>> EX6snfFdTeJMl1tfB4xqOUwBXw_4YXVPsbTNjw04Bpgcdw?e=lFRSWg >>>> >>>> 4 lines of text. I think I can make out 4x35x on the first line, but >>>> that's it. >>> >>> Those are reflections. There is no text, no letters, no numbers. I'll >>> try to get a super-closeup photo later, but this is silly. >> >> Here are two more shots, through a loupe: >> >> https://live.staticflickr.com/65535/54440036155_e9437c6d58_m.jpg >> >> https://live.staticflickr.com/65535/54438807352_4bb9fb0d30_m.jpg >> >> Honest, no text, no letters, no numbers. > Here's a larger version of the better one. I think I clicked wrong > before generating that link. > > https://www.flickr.com/photos/16972296@N08/54438807352/in/dateposted- > public/ > > It does seem odd to have an unlabeled 16 pin device. I can check to see > if that's some sort of coating applied over some text. > > ... Nope. Some fine black stuff scraped away, and the surface now looks > smoother, but still no visible characters. > > I don't know what to tell you except maybe get someone with better eyesight to look at it. The First of the new photos is a good angle, I can see the lines of text but still blurry. The second and third of the new photos are a bad angle such that the light doesn't catch the text, but better resolution. I know Jeff has already commented about seeing the text, I'd be interested if anyone else has seen the photos and can comment. _All_ devices of this type are laser etched with the part number and some sort of factory/lot/date code, or at the very least with some type of abbreviated code that you can decipher with the data sheet. Some companies _do_ have devices custom built with no markings to prevent reverse engineering, but those are rare and generally restricted to higher dollar items. No big deal. It was just a matter of personal interest, don't bother putting anymore effort into it if you don't want to.