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Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Recent content by USER REDACTED

  1. U

    DCF77 antenna - DIY

    I do not want to buy anything I can make myself! :) To hobbyist, making simple devices gave some satisfactory and spare from lost of time and money... Already made my own basic version and actually works suprisingly accurate measuring inductance. Capacitance is as well very accurate up to...
  2. U

    DCF77 antenna - DIY

    2N3819 is not available in LTspice free version. IRFZ44 is just last tested. The same or similar behavior with other tested as well. Never mind actually, I will try to make LC meter in the near future. Thanks.
  3. U

    DCF77 antenna - DIY

    Attempt is made to test this with LTSpice - failed. It started some oscillation, however it is unstable. Probably my fault somewhere in construction or settings. Two IRFZ44 are used in schematic, since this is free version. I will try to make some cheap MCU based LC meter instead, complexity...
  4. U

    Best approach in tutoring an OP's?

    :( I'm quite disappointed a moderator saying this. Please start reading from here and conclude further: https://www.electro-tech-online.com/threads/clock-timer-school-project.145459/page-5#post-1230163 You may delete my account after all. Thank you.
  5. U

    Best approach in tutoring an OP's?

    Again, I do not want to argue at all as you started this from wrong reasons. Please do not reply on my posts anymore. The whole thread is pointless anyway, as the main assumption about "tutoring OP" is absolutely wrong. Some of moderators may lock it.
  6. U

    Best approach in tutoring an OP's?

    As I said, you have started all involving vanity in. Please avoid that as there is nothing about. I do not want to fight at all or arguing. BTW, I'm almost retired too. And this whole thread is based on false assumptions. All my basic points are wrote upper and there is no much to add. Are you...
  7. U

    Best approach in tutoring an OP's?

    No, there is several wrong points in all this. Distinguish should be done in few steps: 1. OP's level of knowledge 2. What he want to make 3. What he did so far If somebody says: "I'm a high school student just started with electronic and I want to do this - here is what I done. Is it good...
  8. U

    Clock Timer : School Project

    I believe some unnecessary and unprovoked vanity rush flying around here and upper fact is overlooked greatly... I would not expect from someone who just ran into the electronic to make perfectly designed schematic etc. As well as I would not excpect from someone who just started programming to...
  9. U

    Clock Timer : School Project

    And you overcome it greatly, with exponential learning rate! Motivation and interest to do more is very important in self education, which is simply much more valuable than fulfilling only given task, believe me. You will be in great advantage later in higher education and at work.
  10. U

    Clock Timer : School Project

    Not at all. I'm just saying that experimentation during learning and learning on his own mistakes is equally valid as reading from books and listen experience advices. He is just on beginning of his life and have a lot to learn on the easiest or the hardest way. That is all. I'm in the...
  11. U

    Multitasking using interrupt

    Why not making your own solution with parts you are familiar, in this case 74HC595?
  12. U

    Clock Timer : School Project

    BTW, why should be? He is just a school learning kid and initiative is sign of strong interest to learn and if I understand correctly, this is just another school subject. This does not mean he will follow the path of electrical engineer... :) When get a job, initiative is not quite welcome...
  13. U

    DCF77 antenna - DIY

    As already wrote, I have nothing else than plain frequency counter. Pointer to a suitable oscillator circuit is answer I'm hoped to... Thanks.
  14. U

    DCF77 antenna - DIY

    I do not need anything else, already collected all related with receiving and decoding the signal... At this stage I have only to wire rod properly and blindly to make it around 5mH, with frequency counter only. Thanks anyway.
  15. U

    DCF77 antenna - DIY

    Not sure I have understood, nor that I have explained well... This is similar frequency counter, made by Arduino. Preamp stage is 74HC14 or transistor based circuit. **broken link removed** Preamp (two possible variations): **broken link removed** The simplest LC tank: Applying voltage to...

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