Power regulator for soldering iron. Scheme, description

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Power regulator for soldering iron. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Regulators of current, voltage, power

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Walking through the forum, I found that the guys were seriously, without jokes, interested in the regulator for the soldering iron. This scheme cannot be called "mine", because it is almost typical. Made on KR1182PM1.

(click to enlarge)

The scheme is extremely simple, but, surprisingly, it works. Everything is mounted in a monoblock plug from any burned-out Chinese power source (which, probably, is in abundance for any of those visiting such sites :-). To revive the design, a “nevonka” clings in parallel to the terminals :-) or an LED with resistance. Resistors: both limiting (~600k) and variable (~400k) are selected individually. The main thing is that the resistor captures the entire range without free play. When closing 3 and 6 legs, there is, of course, no way out. The switch is combined with a resistor, but you can do without a switch at all. If you use the device for an incandescent lamp, then it is desirable to add a capacitor (on the right) so that the lamp smoothly gains heat when turned on.

If we regulate something more powerful, then we can put an additional triac (which I strongly recommend) with the anode to the lower output (220v) according to the circuit, apply (2) to the control and remove the output from the cathode instead of (2). Capacitors (left) 1 microfarad each, electrolytes, even 6,3 V. Pluses to the legs 9 and 10. CAREFULLY WITH BURJUINSKY - for some reason they do not digest network impulses after bridges - 10 percent explode, or die quietly hissing. They require the installation of ceramics on H33-H68 nearby. Why is that? - X knows him! OK it's all over Now. Special accuracy is not necessary here, for a soldering iron and lighting - just right! Yes! I warn those who are especially inquisitive. Will not work between phases! Why? Because, as they taught at school, in this case there is no transition through "0": bad pulses interfere with a good triac: (don't laugh. I'm serious at work, people with a tower tried to use them between phases :)

Be careful when setting up. There is no decoupling from the network: not noticeable?

Note Dear Editors: According to the Dear Editors, the capacitors in this circuit must be at least 50V. Apparently then, they will stop hissing and dying. Such a regulator has been working for six months already at the Cat in the light switch in the hallway.

Author: BEGEMOT; Publication: radiokot.ru

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