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  1. bertus

    High voltage boost converter help

    Hello, I had to lookup the term electrospinning: https://en.wikipedia.org/wiki/Electrospinning You can not use a transformer directly, as transformers do not work with DC. You will need to make an oscillator to make AC from the DC and use a transformer. You could also have a look at fly-back...
  2. bertus

    Can I attach a water pump (12v) to raspberry pi (3v)?

    Hello, There seem to be two versions of the pump on that page. Using the pull down menu I see: USB DC 5V 3W or DC 12 V The USB version uses a USB connector. The 12 Volts version uses a different connection. Bertus
  3. bertus

    Can any help with a few electronic questions?

    Hello, As said, show us what you have done upto now. Perhaps this page of the eBook will help: https://www.allaboutcircuits.com/textbook/direct-current/chpt-5/what-are-series-and-parallel-circuits/ Bertus
  4. bertus

    Is my flowchart for programmed io and interrput drive io correct?

    Hello, You can not link images from AllAboutCircuits. You will need to upload the images on this site. Keep the size of the images around 300 kB. I also posted the link, so others can see what already has been given. Bertus
  5. bertus

    Is my flowchart for programmed io and interrput drive io correct?

    Hello, Again, Direct linking of images from AllAboutCircuits does not work. The images come from this thread on AAC: Is my flowchart for programmed io and interrput drive io correct? Bertus
  6. bertus

    Controlling hot plate heat

    Hello, Do you want to control the temperature of the hot plate? Do you want to buy or make a controller? If you want to buy, have a look at this site: https://www.omega.ca/en/resources/pid-controllers Bertus
  7. bertus

    Timed circuit to replace a broken boiler timer

    Hello The image is not visible You have a direct link used to the allaboutcircuits forum from this thread: Timed circuit to replace a broken boiler timer. That does not work ,as direct linking to the AAC is not allowed Bertus
  8. bertus

    Transformer re-wire

    Hello, You have stated the following: When 175 turns gives you 56.6 Volts, you can calculate the number of turns needed for 420 Volts: (420 Volt / 56.6 Volt) X 175 turns = 1299 turns. Bertus
  9. bertus

    2k long shank pot

    Hello, What size and shape does the potmeter have? Have a look at page 4 of the following PDF: https://www.arduino.cc/documents/datasheets/ACP_potentiometers.pdf Bertus
  10. bertus

    Transformer re-wire

    Hello, @roughshawd , is it not the other way around? When the 230 Volts side has 100 wraps (turns) on the primairy side and the secondairy side is 50 wraps (turns), the secondairy voltage will be 115 Volts. Have a look at this page...
  11. bertus

    Transformer re-wire

    Hello, The AAC is the partner forum. I posted the link, so members over here can see what already has been discussed. There are more members that do have accounts on both forums. Bertus
  12. bertus

    Transformer re-wire

    Hello, You already do have a long thread running at AAC: Rewiring a Transformer Bertus
  13. bertus

    Choosing Antenna to use

    Hello, The Internet Archive has a lot of Ham and Amateur Radio books: https://archive.org/details/folkscanomy_hamradio Have a look at the handbooks that you can find over there. You will likely learn a lot from them. Bertus
  14. bertus

    Choosing Antenna to use

    Hello, For the higher frequencies, the educypedia has a couple of pages with the different antenna types: Antennas Antenna list Antenna types Dipole antennas Helical antennas J Pole antennas Loop antennas Parabolic Dish Antenna Radar technology Yagi antennas Biquad antenna Cantenna WIFI antenna...
  15. bertus

    Glass encased component with 2 power diodes held close

    Hello, It is a security thermostat: https://www.tempomatic.net/termostati_ampollauk.htm Bertus
  16. bertus

    Choosing Antenna to use

    Hello, There will be no antanna that can cover the full range you are giving. An antenna for 30 Hz will be huge as the wavelenght is 10 Megameter. 100 kHz is 3 kilometer 100 MHz is 3 meter. https://en.wikipedia.org/wiki/Wavelength Bertus
  17. bertus

    Connecting two separate battery negatives together ???

    Hello, Do you have details on the receiver, as I do not understand the "2 low ouputs and 1 high output" statement? A datasheet would very much help. Bertus
  18. bertus

    Connecting two separate battery negatives together ???

    Hello, Do you have details on the fet board? Wich other boards do you have? You can connect all negative lines together. Bertus
  19. bertus

    Cree XHP70 Anti collision strobe

    Hello, I have deleted your old thread, as the info is almost the same. You now posted more info on the lamp. Bertus
  20. bertus

    Lora module in weatherproof box and antenna outside.

    Hello, Can you use a RA-02 module? That module has a coax connector on the module: https://docs.ai-thinker.com/en/lora/man Here is an other discussion on EVVBLOG: https://www.eevblog.com/forum/projects/lora-ra-01-better-range-than-ra-02/ Bertus
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