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  1. Sunnysky

    Help finding a suitable transformer

    I'm practicing my psychic skills.
  2. Sunnysky

    Help finding a suitable transformer

    I'm guessing it might make more sense to rewind the 50Hp motor for less cost than a custom transformer.
  3. Sunnysky

    Rain sensor alarm

    remote RF controlled relays are avail. on Amazon. You would just wire into to remote switch and add more battery power and then power the buzzer inside. https://www.amazon.com/Button-Wireless-Control-Receiver-Controller/dp/B00JL3J594 the buzzer might be a nuicance when you forget to turn it...
  4. Sunnysky

    Ozone machine Repair

    The yellow Mylar insulation tape is on the stepup HV transformer. No idea how the pot is connected , both appear to be 500k
  5. Sunnysky

    Which chip used to optimize measuring many batteries.ject

    sounds like a DIY home project.... It is also possible to use <2A gold contact SPDT relays to MUX the output to charge a floating cap, then MUX cap to ground reference. In the old days I used Mercury wetted micro relays for an HP ADC MUX...
  6. Sunnysky

    Which chip used to optimize measuring many batteries.ject

    4067 can MUX up to 10V, not 512V. But. these can handle 200V signals for MUX. One could use an R divider. https://www.maximintegrated.com/en/products/analog/analog-switches-multiplexers/MAX14803.html/tb_tab1 not cheap though.
  7. Sunnysky

    Household electronics epidemic failures

    Came home after a family party Saturday nite and my outdoor LEDs garden lights and TV were dead. HDMI on TV no longer worked. so switched to VGA ok. TV was connected to digital tuner on Ethernet was connected to rooftop antenna. Then today laser network printer was locked up, and it wasn't...
  8. Sunnysky

    Pokemon Go

    If you don't have an addictive propensity, you may after you download it. ALthough I did enjoy playing PLants vs Zombies (PVZ) with the grandkids.
  9. Sunnysky

    Ozone machine Repair

    There is no inductor on board to create the arc for the ozone. THe board seems to missing a lot of essential parts.
  10. Sunnysky

    Amp In Protection Mode

    The glue is added by factory to prevent vibration on all big radial parts is ok and broken leads or moving pot position. I would still swap Q603. RV601 looks like it is already adjusted to minimum CCW with possible no contact. Check voltage on center tap when adjusting for contact test. We're...
  11. Sunnysky

    Which chip used to optimize measuring many batteries.ject

    Why is component count so important if they are inexpensive parts? If I understand you, 32x14.2 =512V is your battery voltage but you need Battery voltage for each cell, yet you have not mentioned load balancing. This design detail "spec" is insufficient, or at least inconsistent with good...
  12. Sunnysky

    How does this work?

    it jolts on each quick press then release repeated and uses 3.0V lithium cells. It charges the inductor with current then oscillates when released. An air coil prevents saturation and resistance limits the input current.
  13. Sunnysky

    HELP identifie rectifier values

    These shud replace each group with mods to bolting to heatsink http://www.ebay.com/itm/Electronic-Component-400A-100V-Schottky-Barrier-Rectifier-Diode-Module-/310578003621?hash=item484fe43ea5:g:GCkAAOSwjVVVtZeA
  14. Sunnysky

    Amp In Protection Mode

    R623 reads 67.6 mV. ...... 39Ω ~2mA implies leakage across C613 if stable. bad cap? R621 reads .601 V ... shud be similar to R622 but depends on offset adjustment VR601 If not adjustable , something is still pulling more current on Q603 that forces its collector lower and output to speakers...
  15. Sunnysky

    Fuses, fuses...

    At the risk of more damage in case of a speaker short, yes
  16. Sunnysky

    LED or CFL flickering with motion sensor in circuit

    This sensor triac needs more load current to sustain a holding current in all Quadrants. i.e. a less efficient light. Not all lights have PFC and this would help the triac work , maybe. (dimmable) try that nitelite suggestion if you have a GFCI outlet or a dummy load of 10W
  17. Sunnysky

    Need someone to check my circuit

    That's why I suggested CSA/UL approved rubber mat heater for water beds.
  18. Sunnysky

    Piezo To Detect Sound

    a buffered piezo mic = std. electret mic has the better EMI immunity. Use that instead.
  19. Sunnysky

    Appropriate driver for an IGBT 600 V

    1st time? Consider an eval kit with adjustable dead time. http://www.ixysic.com/home/pdfs.nsf/www/UG-IX21844.pdf/$file/UG-IX21844.pdf
  20. Sunnysky

    Technics SA-828 Receiver from 70s- Is it worth trying to save this aging patient?

    Yes the resistors survived without flames but the other details were overlooked.
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