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  1. bertus

    Strange old capacitor

    Hello, It looks like a triple capacitor. It consists of 2 capacitors of 12 uF 450 volts and one capacitor of 16 uF 50 volts. Bertus
  2. bertus

    Sign out, log out, ending my session?

    Hello, I do not know where the servers are located. I do know they use cloudflare to have fast access from all countries over the world. Only @eerob knows where the servers are located, as he does all the technical stuff of the websites of the group. Bertus
  3. bertus

    Sign out, log out, ending my session?

    Hello, Indeed, there has been a change. The forum has been merged with an other electronics forum. The owner will make an official announcement soon. Bertus
  4. bertus

    No reset button found in 4G LTE Mobile WiFi Modem

    Hello, What is the black thing on the modem? Bertus
  5. bertus

    No reset button found in 4G LTE Mobile WiFi Modem

    Does this help:
  6. bertus

    OLD Tektronix Oscilloscope Identification

    Hello, The one you show seems to be a rack version of this one: https://w140.com/tekwiki/wiki/531 The rack version seems to be called RM31. Bertus
  7. bertus

    How do I run a 24VAC solenoid off of a couple of 9V's?

    Old thread. Locked.
  8. bertus

    Audio amp modification

    Hello, The filtering must be done in the circuit before the one you shared. The amplifier circuits look equal. Bertus
  9. bertus

    Artificial Intelligence---What is the Hardware Behind it?

    Hello, Have a look at the following page: https://www.supermicro.com/en/glossary/ai-hardware Bertus
  10. bertus

    Thought for the day ....

  11. bertus

    Not Understanding Arduino useage versus traditional Electronics useage in Devices.

    Hello, I assume so, as they are stated as open source. Bertus
  12. bertus

    Not Understanding Arduino useage versus traditional Electronics useage in Devices.

    Hello, The internet archive has some books on the arduino. From beginner books to very advanced books: https://archive.org/search?query=opensource+arduino&and%5B%5D=mediatype%3A%22texts%22&and%5B%5D=language%3A%22English%22 Bertus
  13. bertus

    Math Severity as applied to Serious Electronics

    Hello, Worldradiohistory has a bookshelf full of old books: https://www.worldradiohistory.com/Home-Book.htm Bertus
  14. bertus

    Math Severity as applied to Serious Electronics

    Hello, Yes, there are more books available over there: https://archive.org/details/opensource?tab=collection&query=electronics&and%5B%5D=language%3A%22English%22 A well known series is from neets: https://archive.org/details/neetsmodules_202003/NEETS%20MOD%201%20NAVEDTRA%2014173A/mode/1up Bertus
  15. bertus

    Math Severity as applied to Serious Electronics

    Hello, This booklet is a nice reference, with a lot of formulas used in electronics: https://archive.org/details/analog_engineers_pocket_reference Bertus
  16. bertus

    garage door opener 2

    This is a follow up from this old thread: https://maker.pro/forums/threads/garage-door-opener.290346/ Bertus
  17. bertus

    Comedy Thread

    https://www.worldradiohistory.com/BOOKSHELF-ARH/Technology/Gernsback/Gernsback-Electronics-Comics.pdf
  18. bertus

    So what's the difference between 12v at 1a and 1v at 12a?

    Hello, Read the following pages: https://www.medicalnewstoday.com/articles/electric-shock#effects-on-the-body https://www.allaboutcircuits.com/textbook/direct-current/chpt-3/ohms-law-again/ It is the current that kills. Bertus
  19. bertus

    So what's the difference between 12v at 1a and 1v at 12a?

    Hello, The current through a body is dependend on the body resistance. Did you read this peace on the wiki page? Bertus
  20. bertus

    So what's the difference between 12v at 1a and 1v at 12a?

    Hello, Do you mean the chance of an electrical injury? Read this wiki page: https://en.wikipedia.org/wiki/Electrical_injury Bertus
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