The integrated circuits used in this project are uncommon today. It is worth the idea for a microcontrolled project or with equivalents. We found this configuration in an old documentation.
This very simple circuit was found in a 1977 documentation. The L1 coil has 3 turns of AWG wire 22 to...
This LCD driver circuit uses a common component today. The circuit is from 90's documentation....
In the figure we have the way to obtain the Exclusive-OR function with 1 transistor. The circuit...