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  1. Externet

    Low voltage indicator lamp of 110vac circuit

    Five neon pilot lamps can be used, Hot------------A-----------switch------------B-----------Pressureswitch---------C--------pump---------N eutral A pilot lamp between A and N will tell the mains is good. A pilot lamp between C and N will tell the pump is energized. A pilot lamp between B and C...
  2. Externet

    Newbie circuit board on battery question

    What I would do is apply 4.00 V to each cell - one at a time- for about 10 minutes each without disconnecting anything. That will bring their voltage high enough to be recognized as 'healthy' by that controller board, and the speaker can/should be recharged normally. The performance of the pack...
  3. Externet

    Small solar power constant charge to charge a big capacitor.

    Your 'small' solar panel charging current (I) is like the dripping into a bucket with capacity (C) during time (t) filling to a level (Q). "No reverse to the charging current" ??? What will be the use of the charged capacitor ?
  4. Externet

    Small solar power constant charge to charge a big capacitor.

    Just apply/know the formulas beyond voltage (V) in volts = current (I) in amperes x resistance (R) in Ohms : Charge (Q) in Coulombs = current (I) in Amperes x time (t) in seconds and Energy (E) in Joules = voltage (V) in Volts, x charge (Q) in Coulombs and Charge (Q) in Coulombs = capacity (C)...
  5. Externet

    Stabilizer for fridge, washing machine and Led TV

    Chandu, what do you call 'short circuit' ?
  6. Externet

    Dishwasher making a buzzing noise

    A dishwasher is better diagnosed by diving into it than from the comfort of a keyboard, noting if it happens at a certain cycle or all the time, and finding the origin of the noise. Obtain its service instructions. It will help with your irritation.
  7. Externet

    Electrolytic Capacitors With Higher Stamped Value

    Before condemning those capacitors, check new ones and others you may have to confirm your meter is not reading higher. As above, they are usually +80% -20%, and do not blindly set your mind onto capacitors. Have you tampered with head azimuth setting ?
  8. Externet

    How to add audio to a picture frame

    Or, glue : ----> https://www.parts-express.com/dayton-audio-daex25qlp-4-quad-feet-low-profile-25mm-exciter-10w-4-ohm--295-262?utm_source=google&utm_medium=cpc&utm_campaign=pla ----> https://www.ebay.com/sch/i.html?_nkw=audio transducer (look for full audio range types; can also attach to the...
  9. Externet

    Reversing polarity on push of a button

    The hard part for a momentary DPDT is "must also not output anything when the button is not pressed" Doing it with a momentary push switch in series to a DPDT switch is easy. And a momentary up/down window switch type has center off, also applicable but has two buttons, if you can live with it...
  10. Externet

    Capacitor M368 any polar-connecting?

    Hi. Those capacitor are made for use with alternating current too. Look for the ~ AC symbol somewhere on them. Not polarized, use any side for ± Usually canibalizable from discarded power supplies. ----> https://www.vishay.com/docs/28132/mkt368.pdf ---->...
  11. Externet

    What is this component fitted to my 24 volt pump?

    Aim troubleshooting towards all solder joints, contacts and internal wires breakage. That circuit should be a filter/protector from spikes and transients. Do not remove/bypass from circuit, it smooths the PWM pulses.
  12. Externet

    The name of this device?

    Welcome. Floating piezo atomizing transducer ? ---->...
  13. Externet

    What determines compatibility in Android phones...

    Hi. Is it the availability of power supply outputted at the USB port ? Is it data acceptance into the USB port ? Both ? More ? For this gadget ---->...
  14. Externet

    Something small and loud needed.

    Tie to a stiffer wire ---->...
  15. Externet

    RF detector

    :confused:
  16. Externet

    RF detector

    To use the RF, search with the word 'sampler'----> https://www.worldwidedx.com/threads/rf-sampler.32110/
  17. Externet

    Halogen to LED

    A single? 800+ Watt transformer should be massive enough to find it with a metal detector. (Like one in a μwave size) Borrow one and have fun sweeping ceiling (and walls?) if there is no ceiling/attic? access. When found, you also find the mains primary source for all lamps, and the 12V...
  18. Externet

    RF detector

    Not even extra set of contacts is needed. The existing single grounded PTT line can be used for multiple things.
  19. Externet

    Air Conditioner

    Can you translate 'coil' ?
  20. Externet

    Under water wireless signal?

    Or a pair of these ones (for Tx, Rx) ---->...
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