In 3 secs there are 100 power mains half-waves (assuming 50 Hz).
@candidoCan you please let me know further details about your secondary winding? What wires did you use?What cross-sectional area ? I do not understand thisBut I think in 1 sec there are 50 waves. in 3 sec there are 3x50 =150 secOr am I wrong?Thanks for feedback.
Hello, I bought your pcb board and parts, ordered the other parts needed from ca.mouser.com and soldered them all up. It was real easy to solder the through-hole parts. I just had to google which way the LED diode would go, I dont think that big red capacitor in the corner is polarized is it? I put mine printed label outwards.I found a transformer out of a Fridigaire 1100W microwave, also have 2 other smaller transformers out of 2 different microwaves. I will use the 1100W for battery tab welding and follow your website on building one.On a side-note: Can I use this board as a Auto Transformer/Variac, the instructable said I needed any "Solid State Dimmer for inductive loads" this is for an Arc Welder, using 2 modified transformers in series.http://www.instructables.com/id/Build-a-Microwave-Transformer-Homemade-Welder/I was wondering, with your knowledge, do both of these transformers have to be exactly the same or can they be different?The flat side of the LED is the minusThe big red capacitor in the corner is not polarized>>Can I use this board as a Auto Transformer/VariacMaybe, I have not figured this out, but you can use it for solid state relay and maybe for dimmers too with custom software.>>do both of these transformers have to be exactly the sameWhen the transformers are in series, I suppose this it no problem.Thanks
Hello it possible to buy already build board and how ?
I purchased the 2015 board and the programmed chipand then purchased all parts except the block transformer from MouserI got the block transformer from amazon but ordered the incorrect but very similar 2, 0/1/9 transformer when I should have ordered the 2, 0/2/9 version. The basic difference is that the version I ordered has only one secondary coil not two.The primaries are identical.I started by installing the mains connectors, transformer, bridge rectifier, voltage regulator and electrolyticfilter caps. The transformer became very hot and I could get no output from the voltage regulator(expected 5vdc) so this is when I eventually discovered the incorrect transformer.I removed the transformer and tested it separately and it appears to work correctly so removed the bridge rectifier and voltage regulator and reinstalled the transformer and it works fine.So at this point I think either the 2, 0/1,9 or 2, 0/2/9 transformer should work ( the /1 does not have apin 8 to cut.So now I will have to get a new bridge rectifier and voltage regulator and test these in circuit.Not sure what went wrong the first time
Okay so flashes 4 times at start vs 2 timesbut when I press the weld button it turns off for the appropriate amount of time depending on the time selection. also can select continuous weld per instructions.but completed the assembly connected control board to MOT transformer wound with 3 turns in the secondarybut the primary cord was shorted at the primary terminals so when I pushed the weld button it blew the side out of T1.I will change both T1 and T2.