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Ask Sir Tony - an Electronics/Electrical Q & A thread

  • @awakeruze
    tnx, try it 2m.


  • awakeruze Send Message View User Items on July 04, 2014 08:28 PM
    @clerrific
    Does it only happen during or after heavy rains?

    Hesh Send Message View User Items on July 07, 2014 07:16 PM
    Baka sa wiring yan nang phone mismo galing sa extension or main line.


    will check sa wiring.

    @ awakeruze
    nope pare di naulan hehe!
  • @clerrific
    You may need to call your phone company to have it checked.
  • ^ tried lately palitan yung cables, still the same. Oh well your right hanap na kami ng third party na gagawa nito.

    TIA!
  • ^ may ground wire ba yang line nyo

    -- edited by silentorange19 on Jul 10 2014, 03:52 PM
  • @clerrific

    na try niyo na ba gumamit ng ibang telephone unit? baka yung phone mismo ang faulty.
  • Yup mismong phone po yung faulty gusto ko lang malaman kung anong electric component sira neto sa loob. Dunno about modular and demodular

    @silentorange19
    what kind of ground wire? yung naka set na telephone line nya sa inhouse na 4 colored wired imbes na 2 colored wire or yung setup ng telco sa TTC(errr TTC or TDC ba tawag dun?)
  • what kind of ground wire?

    If you look at the telephone's service box outside your home, you'll probably find a green wire (it's the ground wire) connected to a grounding rod half-buried in the soil/concrete, like this:

    External Image


    -- edited by awakeruze on Jul 11 2014, 01:02 PM
  • ^ yan ang point ko dati kase may telepono din kami may ganyan
  • oks boss meron kaming ganyang naka established. Will try to check the 3 mics baka andun yung tama.

    salamat sa mga nag reply.
  • i got 5 old chandeliers, one of the 5 is in another house. around 40 years old. the socket/bulb size is E14. Incandescents work fine in all of them

    except for one (looks a little shinier and younger) chandelier e14 cfl's and led bulbs dont work in some sockets. usually half or less of the sockets work so I just buy one cfl/led bulb, write down which sockets work and then buy more to fill the sockets. The rest of the sockets which dont work have incandescents but I unscrewed them a bit so they dont light up


    I tried carefully soldering a spiral bit of copper wire on the tip of the light bulb so that its 2-4 mm longer than usual. It works maybe 20% of the time. In those instances where it doesnt work the wire is compressed back onto the tip of the bulb so I know i'm hitting something

    Once I even tried carefully (with the power off) using long nose insulated pliers to gently pull up the center contact a bit. Nope didnt work


    any suggestions?

    -- edited by AuspexBearer on Jul 12 2014, 10:31 PM

    -- edited by AuspexBearer on Jul 12 2014, 10:31 PM
  • mga sirs/mams.

    pano po i test kung na short circuit ang extension power chord saka power plug adapter?

    add'l info: iyong power adapter plug ho ay 3 way,wala po siyang wires.pag kinabit sa power outlet pwede nang isaksak ang add'l 3 appliances

    ito po sana gagamitin kong pang test:
    <click here for link>
  • good am kapag mbaba output ng + 12v ng psu at mataas -12v ano po pinapalitan dun ? ano po dapat i check tnx ?
    kpag may ic n sira from old charger hindi na po mabasa sulat may way po b para malaman value nun ? batt charger newstar model po tnx
  • Mga boss pareho lang ba ng konsumo ng kuryente ang dalawa:

    12v battery ng motor icha charge gamit power supply katumbas ng overnight use

    Direktang pag gamit ng ilaw sa kuryente overbight.

    Ang punto ko dito ay equivalent electrucal consumprion ng pag charge ng battery ng motir 12v pang ilaw sa pag durektang gamit na mismo sa kuryente
  • Triple post

    -- edited by lezalga on Jul 16 2014, 08:51 PM
  • Triple post

    -- edited by lezalga on Jul 16 2014, 08:49 PM
  • boss ano titingnan ko sa speks ng cellphone charger para masabi kong fast charger ito kumpara sa isa pang charger?
  • ^ amper or MA or A sa output spec
  • mga sir pede ko ba magamit ang 12v 1A 12w power adapter sa 7v 1A device? same polarity.

    salamats!
  • ^baka masira device mo pag 12v i input mo para sa 7v... uusok yan.. lol
  • safe ba na 1amp lang req. tapos gagamitan ko ng car battery?

    ttr ko kasi gamitin wireless modem... :)
  • goncel on July 22, 2014 10:41 AM
    mga sir pede ko ba magamit ang 12v 1A 12w power adapter sa 7v 1A device? same polarity.

    salamats!


    ComPeter on July 22, 2014 11:03 AM
    ^baka masira device mo pag 12v i input mo para sa 7v... uusok yan.. lol

    so hindi po advisable maski parehas sila ng amperage? hehe... sinisigurado ko lang bago ko i-try baka umusok nga.. lol!
  • safe ba na 1amp lang req. tapos gagamitan ko ng car battery?

    ttr ko kasi gamitin wireless modem... :)


    pwede basta pasok sa input voltage ng modem yung voltage ng battery.
  • safe ba na 1amp lang req. tapos gagamitan ko ng car battery?

    When dealing with car batteries, high currents are a real danger (both to the equipment and the user), so any form of current limiter is recommended.
  • @ComPeter

    safe ba na 1amp lang req. tapos gagamitan ko ng car battery?

    ttr ko kasi gamitin wireless modem... :)

    Place a fuse with same current rating for wireless modem for safety measure. Accidental short of unprotected wiring will fry the wires.
  • mga bossing pasensya na di cctv ang camera na itatanong ko pero feeling ko ganun din sila mag work. mag shoshoot kasi ako ng livefeed gamit ang handycam from first floor kaso yung projector nasa 3rd floor. ang problema walang butas sa mga floors kaya dadaan sa hagdanan yung wire kaya parang aabot siguro to mga 60-70 feet. ano po mas practical at epektibo coaxial cable na lang ba or cat53 with video balun po? maraming salamat po. either sa projector or sa tv ipapalabas yung live feed.
  • @circuit1234, may fuse na po na 1ampere.. ng hahanap ako ng circuit para ma limit/maintain ang 12v sa line. kasi minsan umaakyan ng 15volts ang line. may nakita akong diagram sa net na gamit ang transistor na 7812. pag nakakuha na ako ggawan ko muna para safe yung device.. :)
  • Sir noob question: pag ba ang 2 battery na 10amps @ 2700mah kinonek via parallel connection ang output magiging 20amps?
  • @ComPeter

    @circuit1234, may fuse na po na 1ampere.. ng hahanap ako ng circuit para ma limit/maintain ang 12v sa line. kasi minsan umaakyan ng 15volts ang line. may nakita akong diagram sa net na gamit ang transistor na 7812. pag nakakuha na ako ggawan ko muna para safe yung device.. :)


    Remind ko lang na yun LM7812 +12V IC Voltage Regulator ay para lang sa DC input voltage between +14.5V to +27V. Kapag bumaba yun source or battery below 14.5V ay baba from +12V ang dc output nito. Kakapusin yun supply para sa Wireless mo. Pero kung gagamitin mo lang yun wireless mo habang umaandar ang makina ay no problem. Dahil around 14.5V ang charging sa battery mo.

    Hwag kalimutan lagyan ng heatsink yun 7812 IC para di masira kaagad.

    -- edited by circuit1234 on Jul 23 2014, 04:12 PM

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