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  1. F

    Build your own CD battery tab welder for about $100.00+-

    :cry: maybe my thyristor is dead..seems that it is alway activated, also without the trigger. I cannot put the second electrode onto the cell because it literally explode in a lot of sparks, I think the PN junction is welding itself this is the second thyristor that I have broken, the first...
  2. F

    Build your own CD battery tab welder for about $100.00+-

    hi rick, the electrodes are very oxidized copper and, as Jeremy told, copper leave a lot of material on nickel strip..I'm looking for another material (nickel?...) About the Twin Carbon Arc electrode handle: it is nice but you have to be very carefully, both the electrode must be pressed very...
  3. F

    Build your own CD battery tab welder for about $100.00+-

    many thanks to everybody! my first spot welder is working very well!! :D
  4. F

    Build your own CD battery tab welder for about $100.00+-

    hello abe, just tried thyristor..it works. Same behavior, the gate was triggered with AA battery, 1,5V (or also with 18650 li-ion cell, 3,8V 1,5Ah) but the gate remains opened also when I disconnect the battery. Is this correct or wrong? For the test I connected a lead acid battery, 12V 7,2Ah...
  5. F

    Build your own CD battery tab welder for about $100.00+-

    I've got the cap and two thyristors (THYRISTOR SILEC IBM 227 A 2395852 3.36 and THYRISTOR SILEC IBM 227 A 2395852 3.02) but I still cannot found the datasheet of thyristors (no match on http://www.datasheetarchive.com/ and similar sites) anybody knows what are the voltage required for gate...
  6. F

    Build your own CD battery tab welder for about $100.00+-

    hello to everybody, many thanks for this topic, it solve to me a lot of problems in order to weld my new lithium cells 8) I'm going to build my spot welder so I found this cap http://cgi.ebay.it/ws/eBayISAPI.dll?ViewItem&item=220461521192&ssPageName=STRK:MEWAX:IT and this thyristor...
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