Recent content by nura100

  1. nura100

    5 volt to 3.3 volt

    Hi Salahadeen, i have drawn a circuit that might be of help to you, best of luck ! arun
  2. nura100

    increasing backup time of ups

    Hello Olalekan, you've asked about "cold Starting", Let me explain: if you are using your PC which is connected to your present UPS and there is a Power Failure, the UPS continues to supply Power to your PC in Split Second changeover. this is called Warm booting. consider a situation when...
  3. nura100

    increasing backup time of ups

    Hi Olalekan, It is difficult to  home brew  an SMPS Battery charger, unless you are fully experienced with Switching Supplies. you can Purchase a readymade SMPS 12V, Battery charger kit and use it, it is worth the investment, than trafo charger. as suggested by Mvadu you have to use a...
  4. nura100

    increasing backup time of ups

    Hello olalekan ! you can use a
  5. nura100

    12vdc heating element

    Hello Frankie, i guess you can try using a 12 Volts DC Soldering Iron tied to the Fuel Line(10 inches) or use a 12 volts DC Diesel heater used in
  6. nura100

    Polar Capacitor as a Diode?

    Hello aniruddha i don't know what you are upto? ::) i defintely have answer for your thrid Question: No, it wouldn't act like a Diode, but you'd hear a bang, then your room will be filled with fine mist when that Polarised electrolytic Cap is put in wrongly(polarity) this is my personal...
  7. nura100

    Transferring artwork on to a PCB

    Hello Friend :) First of all , your Inkjet/dotmatrix Printer cannot be used to make PCBs, bCoz of the resolution issues.(the characters are formed by minute dots of soluble ink)  :( secondly you cannot  use the photocopier method if you are using inkjet printout, bcoz the Copier doesnot...
  8. nura100

    Ceiling fan remote control regulator

    Hello Audioguru & alun :D Musty Send me a personal Request, for some other Project, which i replied. i did project some 8 Months back, got the the final result by combing some of my earlier projects. 3- 4 schematics were used. ;D i drew the schematic on some piece of paper at work place...
  9. nura100

    Ceiling fan remote control regulator

    Hello Musty!  ;) Check your Yahoo mail box, i have replied to your Mail. :D i have already built the project you are talking about. i built this one ,bcoz iam lazy to get up and adjust Fan speed when watching TV, on computer etc. ;D i just point the TV Remote to the Sensor and Switch the...
  10. nura100

    Inverter Circuit 12V DC to 230VAC Sine Wave

    Hello Sasi  :D the big Diodes, capcitors, 220 Ohms -high wattage Resistor, all these components are used for Protecting the Mosfets from High Voltage Stress & Spikes from the Trafo. if  u are not using them correctly,  the Mosfets are at risk. since you have Vol- 19 of EFY Projects, there...
  11. nura100

    Inverter Circuit 12V DC to 230VAC Sine Wave

    Hello Sasi, there is an error in your Controller board Silkscreen the 6 amp diodes(diode pairs) are reversely connected, they should be connected the other way round. i've  circled them in the Pic. :D have you checked this ;) arun
  12. nura100

    SWG Equivalent of 1mm & .25 mm Magnet wire

    Hello Ante thankx for your Table.  ;D nura
  13. nura100

    Inverter Circuit 12V DC to 230VAC Sine Wave

    Sasi, I also have noticed on your Mosfet Board you have used MOVs which are not present in the Output schematic  ??? were these later added ? arun  :)
  14. nura100

    Inverter Circuit 12V DC to 230VAC Sine Wave

    Pair of diodes befor the  Series Capacitors
  15. nura100

    Inverter Circuit 12V DC to 230VAC Sine Wave

    Hello Sasi ! Today, i was just going thru your Pcbs & Schematics in this thread, i felt there were inconsist with each other. ( hold a second, Don't get angry!) what i mean is - the output mosfet section schematic shows only 33 Ohms gate resistors , but your Board shows Gate resistors +...
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