Lighting control from different locations. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Lighting
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Today, two schemes are used to control lighting from different places. If one of the two switches is in close proximity to the light bulb, then the circuit shown in Fig. 1 is preferable, and if the light bulb is in the middle between the switches, then it is better to use the circuit in Fig. 2.
This finally resolves the dispute about which of the schemes is better [1]. In [2], the problem of increasing (up to infinity) the number of switches for independent load control is solved. In [3] it is already described how to do this without diodes. Any number of double switches of types TP1-2, PT51 or similar can be inserted into a two-wire line (Fig. 3, 4).
Such circuits are suitable for AC and DC lines, they allow the use of two single switches, so the author considers the circuits in Fig. 3 and 4 to be more successful than [2]. The author proposes a route lighting switching scheme that is more successful than that proposed in [3]. Such a scheme (Fig. 5) is more suitable for those who grow champignons. The route in a cave or mine starts at the same place where the voltage wiring (preferably reduced to safe) enters.
Therefore, the scheme of Fig. 5 is better suited for underground gardens than the one proposed in [3]. The number of bulbs and their switches is not limited.
The route is marked with a curved line. While moving inland (to the right according to the diagram), the switches are moved to the lower (according to the diagram) position. When moving back - to the top.
References:
- Kolomoytsev KV. Some thoughts on the simplification of circuit solutions of the authors of the magazine "Electrician"//Electrician. - 2002. - No. 10. - S. 9-10.
- Yakovlev V.F. Independent switching on and off of the load / Electrician. - 2004. -№11, - P.23.
- Bearded Yu. Circuitry for connecting electric generators and various types of loads//Electrician. - 2003. - No. 9. - C.2.
Author: Y. Bearded
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