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The first Personal Computer P101 web emulator

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Here are the dimensions from the original drawing: Here the Openscad code:

module MeccanoRod(size){
    si=25.4;
    extradius=9/32*si;
    holeradius=2.1844;
    thick=0.9;
    difference(){
        cube([12.7,2*5.953125+12.7*(size-1),thick]);
        translate([12.7/2,12.7/2,0]) {
            for ( i = [1:1:size]) {
                translate([0,(i-1)*12.7, 0]) cylinder(thick,holeradius,holeradius);
            }
        }
        translate([12.7/2,12.7/2+holeradius,0]) difference() {
            cylinder(thick,2*extradius,2*extradius);
            cylinder(thick,extradius,extradius);
            translate([-20,0,0]) cube([40,40,thick]);
        }
       translate([12.7/2,12.7*(size)-12.7/2-holeradius,0]) difference() {
            cylinder(thick,2*extradius,2*extradius);
            cylinder(thick,extradius,extradius);
            translate([-20,-40,0]) cube([40,40,thick]);
        }
    }
}