Soldering iron power switch. Scheme, description

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Soldering iron power switch. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Ham Radio Technologies

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Genius is simple [1]. Compared to a diode, a variable resistor is neither simpler nor more reliable. But the soldering iron with a diode is rather weak, and the resistor allows you to work without overheating and without undershooting. Where can I get a powerful, suitable variable resistor in terms of resistance? It is easier to find a permanent one, and replace the switch used in the "classic" circuit with a three-position one (see figure).

Soldering iron power switch

The duty and maximum heating of the soldering iron will be supplemented by the optimal one, corresponding to the middle position of the switch. The heating of the resistor in comparison with [1] will decrease, and the reliability of operation will increase.

References:

Danilchuk A.A. Power regulator for a soldering iron // Radioamator-Electrician. - 2000. - No. 9. - P.23.

Author: Yu.Borodaty

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