New answers tagged piece-information
1 x 6 Bricks According to BrickLink, 1 x 6 bricks like the ones you describe were made between 1955 and 1969. 4 x 6 Plates According to BrickLink, there were no 4 x 6 plates with square holes (so-called waffle-bottom plates.) There were, however, 4 x 8's made between 1954 and 1971. Windows Don't know... White Blocks with Clear Inserts The white ...
The white blocks with clear inserts (provided they have LEGO markings, a clear side window and 2 or 3 holes on the other side - I can't tell because you didn't post any pictures) could be 08010 Electric Light bricks, which were produced between 1980 and 1987.
The C1 and C2 lines are either connected to the 9V power supply or grounded because they directly drive classic PF motors and are not just used to carry commands. The 9V and GND poles also need to be properly connected because the PF servo will draw power from those. To drive any LEGO Power Functions motor using a single-board computer (Pi / BeagleBone / ...
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