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Buzzer stwitch, light switch. The image to be transmitted shou...
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Make two fax machines as follows. Using a craft knife, cut two...
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Mark 8 divisions along the four sides of each square. Each div...
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Ruler, polyboard, glue, scissors, craft knife, adhesive tape, ...
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Inside a fax machine: printing head, scanner, roller, thermal ...
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Cut two 6 cm squares from polyboard. Cut a 2 cm central window...
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Cut four lengths of wire several metres long and strip the end...
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Draw a thick letter or number on paper and fit it into the sen...
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The receiver is at rwo 5, column 6; the bulb comes on, so the ...
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Bulb, buzzer, printing head.
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Floppy disks.
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A CD-ROM.
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Computer system.
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Pen, 15 red ping-pong balls, card box and lid, craft knife, glue.
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Take a number of balls (5 in this instance). See if you can fi...
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If you cannot fill a channel, leave it empty and try the next ...
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The windows of the box show the binary equivalent of the decim...
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Mark divisions in one card rectangle to outline eight keys. Pi...
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Connect the four lines of paper fasteners with short lengths o...
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Use double-sided adhesive tape to stick a strip of foil, shiny...
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