Comments on: 40 Year Old Telenorma Station- Clock Controller Checked. Analyzed and  Documented https://jestineyong.com/40-year-old-telenorma-station-clock-controller-checked-analyzed-and-documented/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Sun, 31 Aug 2025 09:17:11 +0000 hourly 1 https://wordpress.org/?v=5.4.19 By: Albert van Bemmelen https://jestineyong.com/40-year-old-telenorma-station-clock-controller-checked-analyzed-and-documented/comment-page-1/#comment-453633 Sun, 31 Aug 2025 09:17:11 +0000 https://jestineyong.com/?p=35534#comment-453633 Update: In July 2025 I also finished making the in the article mentioned Station pulse clock driver device for my watchmaker friend. The upgraded version that was published in Elektor the year 2009 and in the Elektor 311 circuits book under the title "Pulse Clock Driver with DCF Synchronisation" that was enhanced by another great maker.
But after completing that device it showed that it contained an annoying bug that showed the year and DCF pulse wrong on the 1602 LCD. Because of that also Elektor's previous sold PICs of that enhanced DCF station clock program and the PIC firmware were faulty. But because I had written the previous error-free main program myself in 2007, I examined the problem and managed to solved the error in that new firmware. Afterwards the complete DCF Station Clock project still fits in a single PIC16F648A and is now error free.
Another error in that enhanced firmware version was that the polarity of both the DCF and Error Leds was wrong. That also is now fixed in the new firmware version, and was also uploaded and shared with Elektor Magazine. Now free available to anyone that wants this new bugfixed version. Eventually with all information on what exactly was fixed in the previous buggy enhanced version.

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]]> By: Albert van Bemmelen https://jestineyong.com/40-year-old-telenorma-station-clock-controller-checked-analyzed-and-documented/comment-page-1/#comment-452505 Thu, 10 Jul 2025 16:04:08 +0000 https://jestineyong.com/?p=35534#comment-452505 In reply to Humberto.

Thanks Humberto. Nice to hear from you again! I hope the power failures in your country are under control.
In case of power failure in my country I have a backup 2KW 230VAC 50Hz inverter with a 120Ah lifepo4 battery. Plus several portable units including quite a few 5V USB chargable battery packs with a 200Watt solar panel. And a 400Watt 230VAC handcrank power generator. So if needed my solder station or other equipment are operational when the power lines are out of 230VAC 50Hz.

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]]> By: Humberto https://jestineyong.com/40-year-old-telenorma-station-clock-controller-checked-analyzed-and-documented/comment-page-1/#comment-452499 Thu, 10 Jul 2025 12:02:33 +0000 https://jestineyong.com/?p=35534#comment-452499 Congratulations Albert. You have writen an amazing and didactic information, and very well redacted with all the necassary details very well explained

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]]> By: Albert van Bemmelen https://jestineyong.com/40-year-old-telenorma-station-clock-controller-checked-analyzed-and-documented/comment-page-1/#comment-452484 Wed, 09 Jul 2025 15:14:45 +0000 https://jestineyong.com/?p=35534#comment-452484 If you need a 400MHz fast 24 channel Logic Analyzer that works with the free Sigrok software (This new Analyzer is now also available online as affordable product) See also here for all info:
https://www.pcbway.com/project/shareproject/LogicAnalyzer_V6_0_cc383781.html

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]]> By: Parasuraman S https://jestineyong.com/40-year-old-telenorma-station-clock-controller-checked-analyzed-and-documented/comment-page-1/#comment-452384 Sun, 06 Jul 2025 07:52:29 +0000 https://jestineyong.com/?p=35534#comment-452384 In reply to Albert van Bemmelen.

Thanks! Shall watch it during my free time!

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]]> By: Parasuraman S https://jestineyong.com/40-year-old-telenorma-station-clock-controller-checked-analyzed-and-documented/comment-page-1/#comment-452383 Sun, 06 Jul 2025 07:45:07 +0000 https://jestineyong.com/?p=35534#comment-452383 In reply to Albert van Bemmelen.

Many thanks for your response and providing more detailed information with tips!

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]]> By: Albert van Bemmelen https://jestineyong.com/40-year-old-telenorma-station-clock-controller-checked-analyzed-and-documented/comment-page-1/#comment-452382 Sun, 06 Jul 2025 06:33:40 +0000 https://jestineyong.com/?p=35534#comment-452382 In reply to Mark J.

Yes Commodore C64,C128 and later on Amiga computers are fantastic home computers that in the past were great fun. And I still have several C64 computers that I fixed and collected long ago. Nowadays the Amiga also runs emulated in a cheap Raspberry Pi 400 keyboard in the great made by Chris Edwards (fantastic programmer!) free PiMiga4 program that runs and boots a fast Amiga from a cheap SD card and plays on any HDMi TV. And I also had much fun with playing games on the XBOX, and XBOX360. Mostly Halo that is and was a classic! And I made several articles on this blog about diskdrive interfaces and adapters for those computers. My Youtube channel shows only a few of those videos.

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]]> By: Mark J https://jestineyong.com/40-year-old-telenorma-station-clock-controller-checked-analyzed-and-documented/comment-page-1/#comment-452370 Sat, 05 Jul 2025 18:25:18 +0000 https://jestineyong.com/?p=35534#comment-452370 Albert very informative and well written article. I can see from the Commodre 128 box in the background that you are into retro electronics and computers. Good to see you have a Youtube channel as well.

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]]> By: Albert van Bemmelen https://jestineyong.com/40-year-old-telenorma-station-clock-controller-checked-analyzed-and-documented/comment-page-1/#comment-452364 Sat, 05 Jul 2025 16:03:21 +0000 https://jestineyong.com/?p=35534#comment-452364 PS: that digital C-leakage tester is based on Carlton's LV C-leakage tester. See this interesting Youtube video:
https://www.youtube.com/watch?v=LhovRIM5xAo

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]]> By: Albert van Bemmelen https://jestineyong.com/40-year-old-telenorma-station-clock-controller-checked-analyzed-and-documented/comment-page-1/#comment-452363 Sat, 05 Jul 2025 15:58:53 +0000 https://jestineyong.com/?p=35534#comment-452363 Your very funny comment made me smile from ear to ear dear Parasuraman! But I think your repairs are often more difficult and require more time and patience to fix. This Telenorma repair article all in all only took about a week of my spare time.
I count myself lucky that I have collected a good deal of equipment to help me out when I have to quickly investigate all those questionable digital chips in often vintage (retro) devices.
At the moment I'm building a digital Low Voltage C-leakage tester that also can predict if a capacitor gets bad soon. It even can test the high voltage caps upto for instance 1000V. And that tester also can test diodes and zenerdiode upto 30V. If you are interested here is more information:
https://www.pcbway.com/project/shareproject/Low_Voltage_Capacitor_Leakage_Tester_Diode_Tester_to_30v_643c8f95.html

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