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  1. Martaine2005

    Switch off motor driver A4988

    Don’t be concerned. If as you say “12V at the motor”, if the motor isn’t running, there is no waste. Trying to be frugal with 4mA is unnecessary.
  2. Martaine2005

    Make a 74LS193 Synchronous Down Counter Stop at Zero

    Have you looked at the data sheet?
  3. Martaine2005

    Harmon Kardon hk570i Stereo receiver only plays on one side - grounding issue?

    Hi, I would be looking for a loose/bad connection on the faulty channel first. Then a closer inspection of the faulty channel. Dry/cracked solder joints and possibly leaking or swollen electrolytic capacitors. Confusing why it works on AUX though. You’ll probably be better off looking for a...
  4. Martaine2005

    Barking activated device/alarm??? DESPERATE!

    Mmmmmmm, I think NOT!!. You’ve already proved that by your questioning. Anyhow, no need to read this as hopefully, a moderator will take care of your account. This is an open global forum and the only ass is fortunately YOU.
  5. Martaine2005

    My speakers stopped working

    The voltage shouldn’t be a concern as SMPS are usually within a wide range between 90V-240V. Unless the system is one voltage only?. This is more than likely a coincidence and would have failed anyway. Unless of course, the move and any consequential drops/knocks forced a premature failure. I...
  6. Martaine2005

    And now something weird

    You’re absolutely correct Ed. The dark top clothing against the lower lighter clothing. Well, that lower lighter clothing WAS my perceived ‘chair’. Concentrate on the lower portion of scarf, it still resembles a person sitting on a chair:)
  7. Martaine2005

    Comedy Thread

    Now that’s pretty funny for the yanks!. But us Brits, A pound converter? Just doesn’t cut it :)
  8. Martaine2005

    Can HDR cameras be effectively used for macro photography?

    With macro lens, absolutely.
  9. Martaine2005

    Recharge vape battery?

    What specs are on the battery? Looks like a typical 3.7V lipo. Can you confirm? Martin
  10. Martaine2005

    Feather M4 Express + PropMaker Wings + WS2812b LED

    I’m not sure what you’re doing but the ‘Feather’ board looks like nothing is soldered properly. Therefore nothing will work. Martin
  11. Martaine2005

    Building a linear 5v 5a powersupply for Raspberry pi streamer build.

    Hi, what maths are you using? 2 x 6V in parallel is 6V. 7.2V input for a LDO 5V regulator should be fine but what does the data sheet say as you haven’t supplied any part numbers. Is the transformer centre tapped? It should have a label on it?. Martin
  12. Martaine2005

    How does this happen?

    June 7 2008 is just underneath his birthday.
  13. Martaine2005

    Science fair electromagnet suggestions

    In series, the voltage adds up and parallel the current adds up. Example: 2 x 12V batteries @ 100 Amps each wired in series = 24V @ 100 Amps. 2 x 12V @ 100 Amps each wired in parallel = 12V @ 200 Amps. Read the link that @Delta Prime gave above. Martin
  14. Martaine2005

    Auto shut off circuit

    Have you been eating another dictionary for breakfast? :):):)
  15. Martaine2005

    28 Pin eeprom chip switch

    Hi, you may be able to simply stack them and ONLY switch the VCC. Or if on perfboard, use sockets for the ICs and only switch the power input (VCC)? Martin
  16. Martaine2005

    Introduction

    Welcome aboard! If the termites are battery operated, we may be able to help:)
  17. Martaine2005

    Sallen Key Low Pass Filter, bandpass filter

    Excellent, I’m looking forward to seeing it work. I may have to make one myself:)
  18. Martaine2005

    Help identifying components in old board

    Hi, the black component in the first picture IS a transistor. It’s a Toshiba 2SC367 (NPN). I’ll wait for the more experienced members to comment on those white ‘182’ components. Martin
  19. Martaine2005

    Mi Curved Gaming Monitor 34" - Horizontal lines

    I’d like to hear more about this fault. First the ribbon connector seemed to fix things, and now a piece of paper? I believe there is probably a bad connection somewhere.
  20. Martaine2005

    And now something weird

    I see a silly man shape sitting on a chair with castors and lots of squiggly lines around him.
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