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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 automotive alarm uses common components and is suitable for old vehicles. The circuit was...
This circuit, from an old publication from the 1970s, can be made with silicon transistors like...
This circuit produces a high voltage (above 5,000 V) to ionize the air around a needle that acts...