Figaro regulator. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Lighting
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Do not look for a plug, cord and case for a desktop temperature controller for a soldering iron tip, a circuit (Fig. 1) will help to make your desk lamp adjustable, which allows you to adjust (the numbering of the possibilities matches the numbers of the switch positions): 1) load at maximum illumination of the desktop; 2) load when the table lamp is off; 3) the brightness of the table lamp and the load at the same time.
The lamp turns off when the switch S1 is in the neutral position, and the regulator is turned off by disconnecting the plug from the load.
The controller circuit is a textbook (see RE 1/2000, p. 55), therefore I only give a drawing of mounting parts on the board and connecting to the Hertz bridge, thyristor and potentiometer (Fig. 2).
Note the "honeycomb" arrangement of the contact points instead of the "square-socket" arrangement. "Pythagorean monad" makes it possible to make the installation of most textbook schemes without tracks. For the "scratchers" I give a drawing of the "scratching" of the foil getinaks and (or) fiberglass (Fig. 3).
If you had to remove the ballast from the lamp base, put a bag of thick polyethylene or fabric filled with lead shot or scrap there.
Details. VT1 type MP111B, P307 (KT315), VT2 - MP114, MP115 (KT361). Transistors in brackets are soldered as shown in Fig. 4.
Thyristors of the KU202 K-N type, bridge diodes KTs402I or similar. Zener diode D814D. Capacitor with a capacity of 0,25 uF.
Author: Y. Bearded
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