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Compass Vibro Anklet Directions
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==Components== You’ll need all the following components: '''Arduino:''' a controller to run everything. (I’m using the Arduino-clone [www.moderndevice.com Really (RBBB) Bare-Bones Board]) '''Shift Register:''' regulates power and switches which pager motor is running. (I’m using part number TPIC6B595) '''Compass Chip:''' determines compass direction and feeds that information to the Arduino. (I’m using an HM55B from Parallax) '''Battery:''' For power. You’ll need something that will source at least 3.325V and about 700mAh. (I bought a Polymer Li-Ion Battery 3.7V 875mAh from [http://www.all-battery.com/polymerli-ionbattery37v875mah383562.aspx here) '''Pager Motors:''' Eight vibrating motors. Whichever one is northmost will vibrate. (I bought ROB-08449 vibration motors but they were crazy overpriced - $7 each, it's better to get them from [www.pagermotors.com pagermotors.com]) '''Proto-board''' a thin board with a grid of pads into which one can solder the components, which you will need to cut down to size (available at an electronics store). '''Ribbon Cable:''' One or possibly two twelve inch lines of Ribbon Cable wire to connect the controller to the pager motors. (available at an electronics store) '''Connector/Switch:''' A power switch or connection for the power supply to act as an on/off switch for the device (available at an electronics store) '''Connector:''' A 9-pin connector to connect the shift register to the pager motor assembly. (available at an electronics store) '''Wiring:''' Wire & solder & electrical tape to connect everything (available at an electronics store) '''Elastic:''' The main body of the anklet armature. Two inches wide. About 12 inches of elastic, plus a few three inch pieces to make pockets for the controller and the battery. (get from a fabric store) '''Zipper:''' A zipper so that you can close every up when you’re not tinkering. About 12 inches of zipper. (get from a fabric store) '''Velcro Strip:''' To close the anklet. About an inch wide, and three or four inches long. (get from a fabric store) '''Felt Strip:''' To connect to the ankle on the other side and hold onto the Velco-backed motors. About an inch wide and twelve inches long. '''Foam:''' A thin strip of foam. Goes between the felt and the elastic to absorb vibration (making it easier to distinguish which motor is vibrating and to make the device quieter). About an inch wide and twelve inches long. '''Velcro Patches:''' Eight little patches of Velcro, about half an inch square each. These will attach the pager motors to the anklet in a way that lets you move them around the anklet so that each motor is in the right place. '''Cloth Patches:''' Eight little patches of cloth, about half an inch square each. These will connect to the Velcro patches to make little pockets for each pager motor. The cloth patch will be the part that touches your ankle, so pick something soft. '''Casing for controller assembly:''' Casing to hold the final controller assembly. It may be possible to adapt this from a scrounged plastic box of some kind. (make or improvise)
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