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This soft start dimmer was found in a Motorola documentation from 1968. However, it can be implemented with modern equivalent components like the 2N2646 for the Unijunction.
This circuit is from a 1968 Electronic Design. The components are from the era and the operating...
In this charger the current is limited by the incandescent lamp. Lamps from 40 to 100 W can be...
This circuit was presented in a January 1990 Radio Electronics magazine article as part of a home...