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lego seismometer

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Building a lego seismometer Bill of materials Bricks 4 x 2x3brick 2 x 2x4 brick 2 x 1x12 brick 2 x 1x10 brick 2 x 1x8 brick 2 x 1x2 brick 1 x 2x8 brick 1 x 1x1 brick plates 4 x 2x6 plate 3 x 2x10 plate 4 x 1x6 plate 2 x 2x4 plate 2 x 2x3 plate 4 x 1x2 plate 2 x 2x2 plate 2 x 1x1 plate 2 x 4x6 plate 2 x 1x4 plate smooth plates 4 x 1x2 smooth plates Non-lego components 1 x spring steel leaf spring (25mm x 0.152mm x 150mm) 1 x 14mm diameter magnet 1 x 5mm diameter magnet 2 x 20mm x12mm adhesive tape (eg kaptan 0.03mm, or packing tape ) 1 x coil (1200turn  22mm id 10mm high) 1 x spacer 0.5mm thick for assembly 1 x 3mm thick 50x50mm square steel washer Instructions... there are two seperate lego parts which are hinged together with the thin tape acting as weak flexures.  The leaf spring is clamped between adjacent lego pieces when making the hinge piece, use a strip of card or plastic 0.5mm thick as a spacer to hold the two halves of ...
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Getting data from a BBC:microbit

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Since the BBC:microbit has an accelerometer chip on it it seems only natural to turn it into the heart of an educational seismometer. microbit accelerometer data recorded by jAmaseis datalogging software So what steps need to be done 1) install the mbed serial driver to connect your microbit to your (windows) computer using a USB lead 2) write some code to output acceleration data to the serial line on the microbit 3) make sure you have  suitable microbit device file for jamaseis 4) connect it all together In detail 1) install the mbed serial driver for windows see   https://developer.mbed.org/handbook/Windows-serial-configuration     This will create a virtual serial COM port on your computer... you can check this by looking at Computer...properties...device manager (windows7) On my computer the microbit appears as COM23  2) write some code to output acceleration data to the serial line..  you can do this in a browser on the mic...
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New lego seismometer instructions

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Start with the hinge  Using a piece of 500micron card or plastic as a spacer  the hinge is made from double thickness of tape. Next the Armature is made  The spring is held tight between two 2x4 lego bricks  The hinge unit is added at this stage Finally the Base and completed assembly   The hinged armature is added to the base  The other end of eth spring is bent over and clamped between 2 1x8 lego bricks  Finally a weight is added so that the sensor is balanced and free to move
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