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  1. Jantoven

    spot welder for nichrome wire

    I need to make a 120 volt, 300 watt heater using 32 gauge nichrome wire (10.5 ohms per ft)and have a need to make reliable electrical connection from the nichrome wire to the 16 gauge copper lead wires. I tried silver soldering (oxy acetylene with stainless flux) but the silver solder wire I had...
  2. Jantoven

    Dual NE555 sequential timer

    javascript:openreq('http://www.ortodoxism.ro/datasheets/philips/NE_SA556_2.pdf') Hi all, I built the sequential timer circuit on page 5 of the PDF link above. It is almost what I need but not quite. The 2 pulses are too close together. I need a two 0.5 second long positive going pulses...

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