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  1. Externet

    Project suggestions

    When you read your post yourself, do you understand it ?
  2. Externet

    RC Locomotive Horn fitted to Jaguar XF

    Controversial, but, hey, if that is what tickles you, better install a reservoir tank/vessel in the trunk to hold a volume of air you refill at the service station or at home compressor. ----> http://www.toolpan.com/ATD-Tools-9890--10-Gallon-Air-Tank-_p_340.html An ancient method I saw once is...
  3. Externet

    APOLOGIES TO THE GROUP

    Terry : Did you notice *steve* asked you a question ?
  4. Externet

    Mixing optical sound cable with 3.5mm cable

    Now that you have a better understanding of Toslink, digital and analog and stereo and... you have the tools to play with splitters, converters, adapters to reach your wishes. There should be no mysteries.
  5. Externet

    Mixing optical sound cable with 3.5mm cable

    What you call 'optical sound' may be Toslink. And it carries digital signals. What you call '3.5mm' may be 'line level' analog audio. There is two flavors in both, monophonic and stereo. I know peanuts about Echo dot and if wants monophonic or not; but to mix audio signals, better convert the...
  6. Externet

    Multimeter Question

    Go back to the store and exchange it for the model that pleases you.
  7. Externet

    12v receptacle

    XT60 are not for wall plate mount.
  8. Externet

    12v receptacle

    What would prevent a 'genius' to plug a 120VAC TV to a 'standard' outlet providing 12VDC ? Use ----> https://www.canford.co.uk/Images/ItemImages/large/43-621_01.jpg Or, ----> https://sharehim.org/php/images/technical/socket_I.jpg Or, pick your flavor ---->...
  9. Externet

    Combining 2 audio outputs into 1

    If both signals are "low line level" I would join them with a reversed monophonic splitter. If any signal is speaker level, I would not.
  10. Externet

    lpg sensor

    If I can read the board, you should too. ----> http://www.rhydolabz.com/sensors-gas-sensors-c-137_140/?zenid=0ff7be474265702e1d0cdfda810bd326
  11. Externet

    How would you make a 120VAC powered beep/chime ?

    Thanks, gentlemen. Harald : That was my second choice to do it, by powering a USB cube adapter directly from the neon indicator in the stove panel.:) Edd: That is what I envisioned, but I was wondering if a diac would be implementable. Your Ne-2 would work as a relaxation oscillator until...
  12. Externet

    How would you make a 120VAC powered beep/chime ?

    Hi. For an elderly person that forgets to turn off the electric stove; I would like to add inside the control panel, a periodic beep once a minute as a reminder when a 'burner' is on. Without adding a low voltage power supply, tapping from the neon 'ON' indicators, when energized, something...
  13. Externet

    Surge monitor

    Am very bad with wording. If at a certain instant in the sinewave -say minus 46V and decreasing- ; it is computed that in 0.001 seconds the next sampled value should have decreased to -say -49V- And the presence of a spike reads - 95V, you had a negative spike of -46V superimposed to the...
  14. Externet

    Surge monitor

    A clean sinewave has always an expected value in the next millisecond (or less). Comparing the expected (table value) with the reality reading may trigger a time stamper and an anomaly counter. Synchronizing the table being read and the power sinewave would be vital. -If am expressing myself...
  15. Externet

    Project Help

    It does has some meaning... The black wire to 'ringen' must be disconnected by 'relay2' 'when rl1' engages. Could be done with a SPDT relay, but, hey, there is maaany ways to do it. I have no idea why 'in1' in the relay unit is hooked to audio, if it is supplying '-12V' or what to '5' The...
  16. Externet

    Usb trigger for 12v TV backlight

    I do not see anything wrong with it. You could choose a relay if makes you sleep better.
  17. Externet

    Project Help

    The pictures do not help to discern much. The little information I can tell is There has to be somewhere a ´ĺoop' current sense relay implemented. That must deenergize the ring generator (ringen) [PowerDsine] module or its 70VAC output will likely destroy earphone and something else as the...
  18. Externet

    In search of a brain...

    Thanks. Ken : The string is held outside the 'bottle' by a release mechanism, a magnetic actuator is inside the 'bottle'. If your question is about resetting, take it as no resetting. After release; it's done. Alec : The white arm in the last picture could be pulled levered towards the...
  19. Externet

    In search of a brain...

    Pull force is about 20 N The way I see it is the exterior magnet mechanism should not release the string but move a trigger to release the string. If there is a device/gadget re-purposable from something else, or toy ?? , please advise. Energizing one of these (from a diskette drive) : that...
  20. Externet

    In search of a brain...

    Thanks. Tried to find pictures of the working guts of an ELCB, unsuccessful so far.
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