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91
on: June 12, 2025, 06:36:32 18:36
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| Started by metal - Last post by safkans | ||
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JLC seems more solution-oriented and practical to me. It can do everything in both. But apart from PCB, especially in 3D printing, JLC makes me happier.
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92
on: June 12, 2025, 06:23:14 18:23
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| Started by askelonright - Last post by safkans | ||
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Thank you for invitation. Registration is done.
Note: This message sent by the system behalf of safkans. |
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93
on: June 11, 2025, 10:48:44 22:48
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| Started by askelonright - Last post by hosmis | ||
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This member is invited by me. Registration isn't completed yet.
Note: This message sent by the system behalf of hosmis. |
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94
on: June 11, 2025, 08:10:15 20:10
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| Started by askelonright - Last post by askelonright | ||||||||
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95
on: June 10, 2025, 10:39:32 22:39
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| Started by Ahmad_k - Last post by vern | ||
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Ahmad, I noticed one thing in your schematic:
You have used a 470uF electrolytic cap for CIN, C14. The demonstartion board uses a 2.2uF ceramic cap at that point with a reason! An electrolytic capacitor has a very high ESR at higher frequencies, depending on the type it can be several ohms at 1.2MHz. This can lead to unstable operation and of the LM14203 and to very high EMV. The switcher should draw the input switching current from the input cap, not from the input source. The CINHF C15 is only 0.1uF, that doensn't help either. |
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96
on: June 06, 2025, 02:59:01 14:59
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| Started by Ahmad_k - Last post by Catcatcat | ||
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Components that have not passed testing are subject to disposal. The Chinese are guilty of buying or stealing such components at the disposal stage and selling them. And it also happens that they simply take a similar case, mark it and sell it, like it will do.
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97
on: June 06, 2025, 12:02:39 12:02
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| Started by Ahmad_k - Last post by Manuel | ||
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I face same issue also on a cloned MICREL voltage regulator....
It seems as if voltage regulators are cloned so frequently finally. I agree, buy components always from a sure channel .... If you need low cost products, there are so many chinese component's producer that produce using their own technology ... but you have to accept their warranty limits.... take care, X! |
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98
on: June 05, 2025, 04:22:52 16:22
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| Started by Ahmad_k - Last post by Ahmad_k | ||
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Update
I bought a new batch which the dealer confirmed it is an original chip and gave me a guaranty to return them if they didn't work and they worked perfectly  Huge difference in rising and falling time, signal stability and the switching frequency is very stable on 1.25Mhz not like the fake chip which the frequency is way higher than the expected value. Also the price is only 3x the fake (1.1$ vs 0.4$) I still find it cheap |
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99
on: June 04, 2025, 01:17:08 13:17
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| Started by lecroy - Last post by pickit2 | ||
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Same post was deleted by you for the same reason. so why repost then delete the file yet again.
Yes the users here are a bit lack in hitting the thank you Button, but then if you need thanking maybe you need to post on Facebook. Just check downloads and thank you on a few posts, and the people who are regular posters don't stop posting. for the lack of thank you's. just saying. |
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100
on: June 02, 2025, 03:08:13 15:08
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| Started by lecroy - Last post by lecroy | ||
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I see it's the usual ratio of one thanks left for every thirty downloads. Why does this forum have such a huge ratio of leechers? Link removed.
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