NASA NTRS · 19900000005
Welding-Current Indicator
Abstract
Light flashes on to indicate high current. Simple, inexpensive display circuit indicates when 3,000-A welding current flows in welding gun. Onset of welding current induces voltage and current in 1,000-turn, 28-gauge copper-wire coil. Single-transistor amplifier amplifies induced current, energizing light-emitting diode (LED) connected to collector of transistor. Light from LED gives simple, direct indication of welding current.
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Hensley, Milton C., Huston, Steven W., Kroy, Ralph E.. 1990-01-01. Welding-Current Indicator. https://ntrs.nasa.gov/citations/19900000005
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