Visit the Forums
Register Now!

User Login


Forum Topic

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

  • Mga boss question about avr sana may maka tulong. Meron akong avr 1000w relay type then nagkabit ako ng multimeter sa outlet sa likod niya para macheck ang output niya tapos ang lumalabas 225v-245v which is back and forth yung needle niya at click ng click ang tunog. Then meron ako isa pang multimeter kinabit ko mismo sa outlet kung saan nakakabit yung avr kasabay niya at ang nakukuha ko naman eh constant 220v-221v. May problema ba avr? Nakakatakot isaksak psu ko kasi ang nakalagay sa psu ko 180v-240v then yung avr pumapalo ng 245v and more.
  • Hi, I'm having my house renovated and rewired.

    How hard/easy is it to install a neutral wire to the wiring?
    (How much additional cost will it be to have a neutral wire in addition to the standard rewiring cost?)
    Is it also possible to just have 2 outlets that have neutral wire so as to save costs?

    (I plan to have a wifi light switch installed.)

    Thank you.
  • 1. Added cost is mainly due to the extra ground wire. The grounding wire is usually #14 AWG (2.0mm^2), which is cheaper than the #12 AWG (3.5mm^2) normally used in house wiring.
    It's safe to say that you'll spend less than 50% more compared to not having a grounding wire.

    2. Yes, it's doable, but since you're redoing your house wiring, it's better to do it right.
  • i if i will build a house, i would have it with earth/ground system. plus a couple of 110v power outlet perhaps.
    but not all of our local appliances/gadgets have 3 prongs though.
  • Mga boss question about avr sana may maka tulong. Meron akong avr 1000w relay type then nagkabit ako ng multimeter sa outlet sa likod niya para macheck ang output niya tapos ang lumalabas 225v-245v which is back and forth yung needle niya at click ng click ang tunog. Then meron ako isa pang multimeter kinabit ko mismo sa outlet kung saan nakakabit yung avr kasabay niya at ang nakukuha ko naman eh constant 220v-221v. May problema ba avr? Nakakatakot isaksak psu ko kasi ang nakalagay sa psu ko 180v-240v then yung avr pumapalo ng 245v and more.


    Correct. huwag mo isasak yung PC mo sa AVR na ang outuut ay mataas. it should be between 220-221 Vac lang 220 volts exact preferably.

    *nung sinukat mo ng multi tester yun AC output, you should be sure na calibrated yun multi tester mo ha. baka hindi na nagbibigay ng tamang reading yan.
  • How hard/easy is it to install a neutral wire to the wiring?


    Depende sa layo at hirap (elbow bends) sa price ganun din. and yes possible na dalawang outlet lang ang may ground.
  • Sir pwede malaman kung paano gawin 'to? THank you


    basta isabit mo lang sa turnilyuhan ng casing or sa basta nakadikit lang sa casing yung isang end ng copper ng wire kahit i tape mo then yung kabilang dulo naman sa pader na pinakamalapit jan sa casing mo...i tape mo lang rin...


    Sir anong wire po ba para dito?
  • ^ For house wiring, #14 AWG is used for grounding. For a single computer, maybe #18 is enough.
  • Thanks for the replies!
  • @realitybytes

    yep sir calibrated multitester ko pati dun sa pinagbilhan ko same lang kami ng nakukuha umabot pa ng 247v. Ang ginawa nila nicalibrate nila binalikan ko after 1hr then pareho namin tinest now ang range niya 208v-227v hindi na lumalagpas laging inbetween jan either 220v up and down. Until now inoobserbahan ko pa at mukang stable naman na di na malikot yung clicking at di na umaabot ng 227v and up.
  • may idea po kayo anong relay ang pwede ikabit pang patay at bukas ng Aircon? required control is 5v. ok po ba tong item na to? <click here for link>

    -- edited by gade14 on Sep 05 2016, 04:56 PM
  • Kahit ba hiwalay ang kuntador/electrical connection namin sa kapitbahay dito sa apartment complex, May possibility rin ba na maapektuhan ng power surges yung appliances ko kapag gumagamit ng power tools ang kapitbahay namin?

    -- edited by ActualCannibal on Sep 08 2016, 12:16 AM
  • hi!

    masters, ask ko lang... pano dapat ang circuit ko kung gusto ko makakuha ng 10v from 2 usb ports?

    bale ganito kasi... pinalitan ko ung fans na kasama ng laptop cooler ko... 3x 120x120 rated 12v .78amps each sa ngayon working naman sa 5v ung fans kaso gusto ko lang sana na lakasan pa since nahihinaan ako...

    also pano ko pala malalaman ung amps draw pag 5v ung gamit ko at pag 10v? para maihanda ko ung power supply na gagamitin ko...

    thanks! :)
  • ^ You'll probably fry your laptop's USB ports if you try powering three 12v fans like that.
  • ^
    @ cabs
    hindi ka makakakuha ng 10v from 2 usb ports. hindi ganun yan na pagsasamahin mo lang doble na boltahe.
    talagang mahina yan kasi 12 volts ang fan mo.

    bumili ka na lang ng murang pc power supply dun makakakuha ka ng 12 voltage.

    * at hindi ma pa fry ang usb port. simply it will not give best result in powering up your fans. lol

    -- edited by realitybytes on Sep 08 2016, 03:19 AM
  • @awakeruze

    sorry kulang info ko... bale ang gamit ko na power supply ngayon ung promate na power base... 6 usb ports with max 8amps total po...

    @realitybytes

    ah so no way to get 10v po talaga from 2 usb ports :( actually may extra psu naman ako dito corsair vs 450. kaso mas malinis lang kasing tignan kung sa promate power base nalang ako kukuha ng power keysa sa psu na madaming wires pa...

    salamat masters :)

    for reference: eto ung gamit ko na power supply ng fans...

    <click here for link>

    -- edited by cabs_14 on Sep 08 2016, 03:30 AM
  • @ lon5210

    Good to know na nababaan nila yun output ng avr mo. why not make it at exactly 220 volts? kung mga mahahaling equiptment ang mga ikakabit mo dyan
    like medical equipments better recalibrate at exactly at 220 volts, otherwise use it at your own risk. :) Say, kung PC naman for me id rather not.
  • @realitybytes

    Naibaba nila pero todo monitor na ako sa kanya meron ako naka plug na ac volt meter para tuloy tuloy monitor. Meron siyang range na pag ang input voltage umabot ng 227 chaka ito baba to 220v tapos pag bumaba naman input to 208v chaka to tataas to 220v. Eto pa hindi ko maintindihan, tumutunog clicking niya pero sa mismong outlet kung saan nakasaksak yung avr eh consistent naman na 220v-221v nakukuha ko (nakakabit dito multimeter para mamonitor ko voltage na lumalabas). Sa PC ko ginagamit sir.