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hard_button [2013/08/13 12:13] (current)
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 +At first, we wanted to flash the Easy Button, but after tearing it apart and pulling off epoxy, we realized it was a one time write chip.  So now we're creating a drop-in replacement board. ​ This board is based on the CC2540 by TI.  It does many cool things including:
 +
 +  *  SoC Bluetooth
 +  *  ADC
 +  *  OpAmp
 +  *  Flash controller
 +  *  Lots of I/O
 +  *  CC2540 Bluetooth low energy system-on-chip
 +  *  One chip integrated device - controller, host and application on one device
 +  *  Includes peripherals to interface with analog and digital sensors
 +  *  In-system reprogrammable flash memory
 +  *  Accurate RSSI function
 +  *  Full-speed USB 2.0 interface
 +  *  Integrated AES-128 encryption engine
 +  *  40-pin 6x6x0.85mm QFN package
 +
 +[[http://​www.ti.com/​ww/​en/​analog/​bluetooth/​index.htm?​DCMP=BluetoothLowEnergy&​HQS=NotApplicable+OT+bluetoothlowenergy||CC2540]] - 5 free samples!
 +
 +So here is what the button will do:
 +
 +  *  Drop in replacement for existing board, no hardware modification necessary
 +  *  Plays back arbitrary audio
 +  *  LED to indicate status
 +  *  Multiple tap control
 +  *  Bluetooth controllable - serial + sound
 +  *  Possible record via onboard mic 
 +  *  All I/O broken out to headers for use in other projects
 +
 +Here are the Eagle Files so far, only the schematics are close to being usable:
 +
 +[[http://​eecue.com/​hard_button.zip|Eagle Files]]
 +
 +[[http://​eecue.com/​hard_button.jpg|JPG of design]]
 +
 +  *  60mm circle
 +  *  1.7mm thick
 +  *  5.7mm holes x 4
 +  *  2.4mm screw holes 2 x
 +  *  14mm dig from screw hole edge to large hole edge
 +  *  13mm between holes from edge
 +  *  sw 4.7mm high
  
hard_button.txt ยท Last modified: 2013/08/13 12:13 (external edit)