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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 interesting automotive alarm was found in a 90's Popular Electronics. The circuit uses...
Using the 4001 integrated circuit, this latching relay can employ any general-purpose transistor. The...
The PA222 integrated circuit used in this project from an American 1967 documentation is not...