Comments on: How To Test Quartz Crystals Found  In Watches https://jestineyong.com/how-to-test-quartz-crystals-found-in-watches/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Sun, 13 Mar 2022 09:02:13 +0000 hourly 1 https://wordpress.org/?v=5.4.19 By: Albert van Bemmelen https://jestineyong.com/how-to-test-quartz-crystals-found-in-watches/comment-page-1/#comment-383460 Sun, 13 Mar 2022 09:02:13 +0000 https://jestineyong.com/?p=19370#comment-383460 In reply to Michele.

Sorry Michele for my late reply, but all circuits including the 4060 circuit are already given in the article.

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]]> By: Michele https://jestineyong.com/how-to-test-quartz-crystals-found-in-watches/comment-page-1/#comment-366510 Tue, 03 Mar 2020 19:50:29 +0000 https://jestineyong.com/?p=19370#comment-366510 Hi Albert,
Thanks for what you do.
Could you give me the circuit diagram please?
Thanks
Michele

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]]> By: Robert Calk Jr. https://jestineyong.com/how-to-test-quartz-crystals-found-in-watches/comment-page-1/#comment-357170 Wed, 08 May 2019 21:21:50 +0000 https://jestineyong.com/?p=19370#comment-357170 In reply to Albert van Bemmelen.

Hi Albert,

I am going to build this circuit that Alan uses in this video so I can test any crystal easily. https://youtu.be/blalAktxFoI

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]]> By: Albert van Bemmelen https://jestineyong.com/how-to-test-quartz-crystals-found-in-watches/comment-page-1/#comment-356760 Tue, 30 Apr 2019 05:31:30 +0000 https://jestineyong.com/?p=19370#comment-356760 By-the-way: The much larger quartz crystals (about 19.5 x 17 x 7 mm) are much easier to test! For instance a 4433.619 KHz crystal can be checked on the oscillator of a Gate-Dipper. The dip occurs at the oscillating frequency of the crystal. Because these crystals are much larger it only is required to connect one of both crystal pins to the Gate-Dipper circuit. The other pin of the crystal doesn't even have to be attached to anything for this and be left unconnected. I used my Monacor LDM-815 Transistor Dipmeter when I noticed this quite remarkable effect.

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]]> By: Albert van Bemmelen https://jestineyong.com/how-to-test-quartz-crystals-found-in-watches/comment-page-1/#comment-356515 Sat, 27 Apr 2019 10:11:12 +0000 https://jestineyong.com/?p=19370#comment-356515 In reply to Robert Calk Jr..

Robert, they say that with AVR microcontrollers it is somehow possible to circumvent the activated copy protection flag that prohibits reading and saving the preprogrammed data. But I do not know anything about doing that for PIC microcontrollers. With AVR processors that are locked if the configurations bits are set wrong we no longer can re-program them by their ICSP or ISP connection that is lost afterwards. But that can be overruled by simple reprogram those locked AVR's in a parallel programmer to unlock them. And I believe I've seen some special NE555 circuits that can do the same.

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]]> By: Robert Calk Jr. https://jestineyong.com/how-to-test-quartz-crystals-found-in-watches/comment-page-1/#comment-356507 Sat, 27 Apr 2019 07:27:59 +0000 https://jestineyong.com/?p=19370#comment-356507 In reply to Albert van Bemmelen.

Yep, that is the one! I have two of them. One works, but I accidently erased the PIC in the other one. It would not let me read and save the data, but it sure let me erase the data!
I should have just built a little test jig and used my scope.

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]]> By: Albert van Bemmelen https://jestineyong.com/how-to-test-quartz-crystals-found-in-watches/comment-page-1/#comment-356506 Sat, 27 Apr 2019 05:34:32 +0000 https://jestineyong.com/?p=19370#comment-356506 Your kind comments are like the very professional repairs you share always very welcome Parasuraman! Thank You!

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]]> By: Albert van Bemmelen https://jestineyong.com/how-to-test-quartz-crystals-found-in-watches/comment-page-1/#comment-356485 Fri, 26 Apr 2019 15:06:25 +0000 https://jestineyong.com/?p=19370#comment-356485 In reply to BEH.

Thanks Beh! I hope your Opamp Tester now completely functions correctly with all Opamps it can test!

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]]> By: Albert van Bemmelen https://jestineyong.com/how-to-test-quartz-crystals-found-in-watches/comment-page-1/#comment-356484 Fri, 26 Apr 2019 15:04:17 +0000 https://jestineyong.com/?p=19370#comment-356484 In reply to Albert van Bemmelen.

I guess you probably tried to copy the PIC and found out that it was copy protected while it was programmed. And in that case you are right there! The TL866 only reads 0000 as data. And the RT809H is incapable in testing these PICs. The RT only sees some 12F family PICs. The guys who sell these with protected PIC programmed Crystal Tester Kits probably are also the same guys from whom I got the dislikes for my article?

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]]> By: Parasuraman Subramanian https://jestineyong.com/how-to-test-quartz-crystals-found-in-watches/comment-page-1/#comment-356481 Fri, 26 Apr 2019 13:37:51 +0000 https://jestineyong.com/?p=19370#comment-356481 Excellent! Very useful article and I learnt something new from you! Testing the resonators outside the circuit is a must for all electronic technicians. Thank you!

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