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

• wmaxell on 01 Feb 19 @ 11:47 PM #

  I have a question.
  
  According to my electrical diagram PP is 200AT
  
  PP1 at 70AT and PP2 at 150AT, should PP be 220AT?
  
  
  Thanks

• senok on 02 Feb 19 @ 01:49 PM #

  If I'm not mistaken, for simpler calculation, add the two then multiply by 80% (sort of duty cycle factor), then get the product and check against the nearest standard panel rating.

• seanne on 02 Feb 19 @ 02:04 PM #

  Nakita ko na yung problema sakin. Biglang di sinupport ng mobo ko tong ram, 3200Mhz yung ram ko. Pag tina-try ko i-enable yung XMP profile, dun nag loloko tong PC. Stuck nako ngayon sa 2133Mhz. Kesa naman di ko magamid. :(

• dodick on 07 Feb 19 @ 02:50 PM #

  mga master, skali mgpasetup ako sa buong bahay ng DC power supply 12v/24v at nasa labas ung DC source ko. pano ko ito mamaintain sa buong bahay pra masupplyan lahat ng dc appliances? thanks po!

• wmaxell on 07 Feb 19 @ 04:32 PM #

  Thanks senok

• fliptop on 07 Feb 19 @ 11:25 PM #

  tanong lang mga sir, hinge lang ako idea magkano parepair.
  sa 32inch TV, repair ng backlight ng LCD TV., nakikita ko yun logo kapag nag boboot up, madilim lang, kaya sigurado ako backlight ng TV yun may sira. wala na warranty
  
  pa price quote lang .thanks

• vanguardwars on 08 Feb 19 @ 07:10 AM #

  around 1000 lang nung pinagawa ko yung Sony 32" LEDTV ko sa isang local electronics repair shop. Problem is busted lang yung 1 LED. 1 year since the repair okay pa. Dinala ko sa SONY center mismo ang quote sakin ay 10k, palit motherboard ang sabi. Di repair ginagawa nila, replace lang.

• xXxYoWxXx on 09 Feb 19 @ 05:47 AM #

  Nakita ko na yung problema sakin. Biglang di sinupport ng mobo ko tong ram, 3200Mhz yung ram ko. Pag tina-try ko i-enable yung XMP profile, dun nag loloko tong PC. Stuck nako ngayon sa 2133Mhz. Kesa naman di ko magamid.

  speed doesnt matter naman daw.. If pang gaming or basic usage lng. .. Diko lang sure in other activity like photo / video editing etc.. Unless kung gagamitin mu yung ram sa Ramdisk software.

• z3phyr2012 on 08 Mar 19 @ 10:43 AM #

  Please recommend saan the best bumili ng BNEW and Heavy-duty na
  
  Gasoline Inverter Generator.
  
  thanks a lot, mga Sirs.

• piLio on 15 Mar 19 @ 02:35 PM #

  paano kaya malalaman if ilang volts ang output nito? from CD/FM/AM Stereo from US, naisaksak kasi sa 220v, 110v lang dapat.
  
  open yung PRIMARY
  3ohms SECONDARY
  
  E190246
  HF-48202L2N
  
  

• awakeruze on 15 Mar 19 @ 03:12 PM #

  ^
  Not sure myself, but there's a good chance that it's 12v. How many wires does it have on the secondary?
  
  Can you take pics of the filtering stage of that power supply? Usually it will have 4 separate diodes in a bridge configuration, or a single 4-pin bridge diode, then one or two beefy electrolytic capacitors.

• piLio on 15 Mar 19 @ 03:40 PM #

  2 wires lang SECONDARY
  
  12v sa net yung E190246, pero wala kasi yung 2nd part number na HF-48202L2N
  <click here for link>
  
  12v din pero, iba yung part number
  HF-48224L2TN
  <click here for link>
  
  
  
  btw, yung putol na 2 RED wires, yan yung output from transformer.
  
  thanks
  
  -- edited by piLio on Mar 15 2019, 03:42 PM

• awakeruze on 15 Mar 19 @ 03:52 PM #

  ^
  12v seems likely. But not I'm more worried for the other parts of the power circuit. I don't know if that blob near the Philips screw is just epoxy or silicone, or some kind of board damage. The big electrolytic capacitor needs to be checked too.

• piLio on 15 Mar 19 @ 04:01 PM #

  parang glue/soft epoxy/silicone lang yan sir, wala pa leak capacitor, hindi din bloated.
  
  try ko na lang kabitan ng 12v 3-5A transformer, ano kaya ang best and safest way para i-test ito with new transformer, low voltage muna? meron akong transformer na multi volt from 1.5 upto 15v 3A yata
  
  -- edited by piLio on Mar 15 2019, 04:02 PM

• piLio on 16 Mar 19 @ 01:54 PM #

  ok na, 12v 3A transformer ginamit ko
  
  
  
  
  -- edited by piLio on Mar 16 2019, 01:54 PM

• awakeruze on 17 Mar 19 @ 12:03 PM #

  ^ Good to hear.

• baysil2000 on 17 Mar 19 @ 10:28 PM #

  Hello po,
  
  saan po ba pde mag pa ayos ng motor ng Vaccum cleaner? Makati Area. Karcher wd2 natanggal turnilyo nung lock nag wiggle yung motor umusok.
  
  Service center replacement almost 6k for motor. tinalo pa brand new. hehehe.
  
  Salamat po

• statix on 18 Mar 19 @ 11:46 AM - Scanning,,,,, #

  ^bili ka na lang ng bago paps.
  shop-vac micro 16L less than 5K(sale) lang bili ko sa ACE.
• Post deleted #12209004

• kurtskyTPC on 28 Mar 19 @ 12:26 AM #

  Naguguluhan ako sa VA at Watts.
  
  Gusto ko bumili Ng UPS lang imbis na AVR para pag nag brownout safe pc ko at may time pa I shutdown. Ok na bumili nlng Ng surge protector at avr or just ups?
  
  Ryzen build at 550VA PSU ko.

• Peorth on 28 Mar 19 @ 06:59 AM #

  ^Depends kung 1) gaano kadalas mawalan ng kuryente sa inyo 2) gaano kadalas at gana kalaki mag-fluctuate yung voltage ng AC 220V sa lugar niyo. Marami akong napagdaan na na desktop rigs pero never ako gumamit ng UPS. Kahit yung rig ko ngayon ay mahal o hi-end di parin ako gumagamit ng UPS kasi 1) stable ang voltage sa lugar namin 2) napakadalang mawalan ng kuryente 3) paminsan nakakasira ang UPS na simulated sine wave (hindi pure sine wave) sa mga PSU na may PFC (power factor correction). Kaya gamit ko lang surge suppressor and servo AVR.

• vanguardwars on 28 Mar 19 @ 07:09 AM #

  VA kasi is apparent power, total power consumed ng resistive load, capacitive, and inductive load. Nagmamatter ito kapag yung load mo is motors or anything na may big coils and capacitors.
  
  Yung Watts is power consumed ng resistive load lang. example is LED TV considered as pure resistive load.
  
  Correct nyo na lang ako kung mali ako. :)
  
  Add ko nalang din, may rule of thumb na power factor na 60% (worst case scenario). So kapag ang PSU mo ay rated 500W, dapat na bilhin mong PSU ay rated na 833.33VA and up (VA = Watts/Power Factor = 500W/0.6)
  
  -- edited by vanguardwars on Mar 28 2019, 07:20 AM

• meruem on 01 Apr 19 @ 07:37 AM #

  Tanong ko lang kung okay lang bang ikabit 20amp rated na outlet sa 15amp na breaker? O kelangan ko pa palitan ng 20amp yung 15amp na breaker?

• kensui on 01 Apr 19 @ 07:42 AM #

  ^ Ok lang

• kurtskyTPC on 01 Apr 19 @ 10:01 AM #

  Hi sirs
  
  May huntkey surge protector power strip ako dito
  kelangan paba Yung avr? Para safe Yung cpu? Thanks

• Peorth on 02 Apr 19 @ 03:00 AM #

  ^Better to use a combination of a surge protector and an AVR.

• dodick on 02 Apr 19 @ 02:50 PM #

  mga sir, i have this 24v-12v@40A converter. Ok naman sya kaso lang po is, kapag wala ng supply ung 24v ehh ngrereverse ung 12v nya... I mean bumabalik ung 12v dun sa converter kya umiinit sya at pti ung sa 12v ehh nauubos ung karga... salamat po.

• awakeruze on 02 Apr 19 @ 05:30 PM #

  ^
  
  You could put a relay on the 12v side that's powered by the 24v side, so when the 24v side goes out, the 12v side gets disconnected from the converter.

• piLio on 03 Apr 19 @ 10:15 AM #

  ano kaya difference ng water heater na pang nawasa or deep well? dahil ba sa mineral deposits?
  
  
  
  
  
  
  -- edited by piLio on Apr 03 2019, 10:17 AM

• kurtskyTPC on 05 Apr 19 @ 10:47 PM #

  I know it may sound repetitive but is secure an okay avr for now while i save?