Recent content by Hunter64

  1. Hunter64

    Can BC548 be replaced by 2N3906 and 2N3904?

    AC, BC, BF is european. 2N is US, 2SA,SB,SC,SD is Japanese.
  2. Hunter64

    LED repair

    94V has nothing to do with the voltage. check out ULV-94, it's about flamabillity of the circuit board.
  3. Hunter64

    Induced current in a coil

    A Hall-effect sensor might be more suitable.
  4. Hunter64

    Induced current in a coil

    That was not the question!
  5. Hunter64

    Low-frequency High-amplitude piezo driver using ATTiny 85

    Do you have any specifications of the Piezo element, otherwise it's impossible to answer your question.
  6. Hunter64

    Replacing a battery charger transformer with a audio transformer can I do it?

    More information is needed. This litterally translates to "I have a problem, do you have a solution... please, please, please."
  7. Hunter64

    Clueless to read capacitor._.

    Maybey your internet is broken in some way, but 'FP5K' directs me to a Nichicon datasheet. https://www.nichicon.co.jp/english/products/pdfs/e-rs8.pdf
  8. Hunter64

    HC05N

    It can indeed be a number of things, that's why I asked my question. What is the complete number, MC68HC05???, there are many different versions.
  9. Hunter64

    HC05N

    It's a Motorola MC68HC05 microcontroller, probably with internal ROM. Without the correct firmware it will do nothing at all. Why do you want to replace it?
  10. Hunter64

    Replace IC 4049

    What is connected to 'A', the centre-tap of the transformer? Can you give more information about the transformer.
  11. Hunter64

    25 PF Capacitor sub

    "There is no polarity shown..."
  12. Hunter64

    What do these numbers mean?

    "Most Marquardt switches are suitable for both resistive and motor loads. The rated current for the motor load is specified in brackets, e.g. 16 (4) A 250 V~. " Just RTFM. https://www.soselectronic.com/articles/marquardt/what-you-might-not-know-about-switches-2287
  13. Hunter64

    Placement of Ammeter in Active LM338 Regulator

    With the PNP-boost solution your current protection is gone. With a 4A transformer a LM350 is a better solution. Shutdown at 3A.
  14. Hunter64

    SPI Signal Overshoot (to WIFI chip)

    Another WiFi IC without any information. A typenumber maybey?
  15. Hunter64

    Mixer psu problems

    Is there a ic in the power supply that drives the mosfet?
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