Lego bug

by OH6DC



Lego bricks were used in this semi-automatic CW key project.




The dash lever seen here moves independently of the main lever. Dash contact is made of a narrow strip of steel and two screws. Rubber bands are used as keying springs.




Inside view: the main lever and its bearing.




Left: dot contact (thin strip of steel)

Center: pendulum for dots (more bricks and weight means slower speed)

Right: damper unit to stop pendulum oscillation (off-road Lego tire was selected for best performance)



See & hear how the bug works:



Link to my other homebrew bug project here.