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  1. Martaine2005

    Crock pot modification

    Seems like you’ve already had a smoke of something!
  2. Martaine2005

    Uneducated question

    Hey Ratstar, you have returned:)
  3. Martaine2005

    Sallen Key Low Pass Filter, bandpass filter

    :) :) :)
  4. Martaine2005

    resistor only ring modulator

    Lol @dragon :) :)
  5. Martaine2005

    Spectrum analyser Equalizer project how to go about it?

    That video is …… I don’t know what. The data sheet tells a different story and I believe the data sheet. You should read it too! The questions you ask are in the data sheet or on the example circuits within the data sheet. Please read the data sheet before asking us to read it for you and then...
  6. Martaine2005

    Spectrum analyser Equalizer project how to go about it?

    There is no upper limit. Each output can control a transistor or many other switching/amplifying devices. The standard output on each channel is 10mA. This can be further controlled by the use of a potentiometer as described above. But you can also use series current limiting resistors with...
  7. Martaine2005

    Spectrum analyser Equalizer project how to go about it?

  8. Martaine2005

    Spectrum analyser Equalizer project how to go about it?

    The data sheet shows an example of linking pin 6 to pin 7 and then pin 7 to Ground via a single resistor. Changing that resistor to a potentiometer will allow for LED brightness to be controlled. Not sure how that makes it programmable!! :)
  9. Martaine2005

    Spectrum analyser Equalizer project how to go about it?

    Each channel outputs 10mA current so one would presume a current limiting resistor in series with each LED. EDIT: I just read that its current is programmable so no need for resistors. Martin
  10. Martaine2005

    Is it possible to use LM2596 buck converter to a 24V dc battery and connect it to a 12Vdc/220Vac inverter to supply raspberry pi 4B?

    A voltage divider won’t give anywhere near enough current. Martin
  11. Martaine2005

    Spectrum analyser Equalizer project how to go about it?

    Mux is your aim here. Only one LED is lit at a frequency that the human eye can’t see. It appears that lots are (on, lit). So mA’s is more like the current consumption. Martin
  12. Martaine2005

    Exercise arm bike power board repair

    Exactly as above. A dry solder joint could have been the only issue. On older Sony TVs, the only advice is to reflow every solder joint, they were notorious. Martin
  13. Martaine2005

    Exercise arm bike power board repair

    This link is by far the easiest method. Do a WWW for your mosfet and get the ‘gate, drain and source’ configuration first. https://www.homemade-circuits.com/how-to-check-mosfet-using-digital/amp/ Martin
  14. Martaine2005

    learn how to check capacitors

    That might just be ‘equivalent series resistance’. :)
  15. Martaine2005

    Sallen Key Low Pass Filter, bandpass filter

    Watch these videos. They will give you good ideas. https://youtube.com/playlist?list=PL55c7xAJO0zHg6X2kzmJ9V6s7SF_f6u7X&si=g2kDFi3mhiGpzb0u
  16. Martaine2005

    Exercise arm bike power board repair

    It’s N channel. https://www.mouser.com/datasheet/2/427/91056-85900.pdf Search YouTube for testing. Plenty of videos on the subject. Martin
  17. Martaine2005

    How to read reply

    Click on the ‘bell’ icon top right. Or click on your name and click on messages. Martin
  18. Martaine2005

    Relay Priority

    Relays have never thought!. With a signal, they either open or close contacts.
  19. Martaine2005

    How to find components with certain specifications

    I would think a call to a pneumatics company that deals with air compressors would be able to help. I used to have a miniature fully functional air compressor. Approximately 6” x 2” with a 12” air line hose. It was built by Alpha pneumatics (I believe) as a rep’s example piece. Martin
  20. Martaine2005

    Fixed reading error in DT-9205A multimeter

    Lol
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