Projects/sonicsensor
From 757Labs
Contents |
[edit] Project Goal
The project would use various circuits and possibly an ATMega chip to capture noise pulse from someone tapping on window glass to select button style menu options.
The circuit would be able to figure out where on the glass that the tap event happened.
The goal of this system is to create a low cost sensor system that operates on the KISS principal and that can be developed for commercial deployment. Since the end goal is to try and sell this system, limited information (for good reasons of course!!) will be posted here; however, there will be some posting as time goes on.
[edit] Current status
Preliminary testing has been performed to verify design concepts and circuits are being developed to create the first trial system with a very simple control interface sending serial data to something like Hyperterminal for verification of sensor outputs.
Code has been started to support automatic control of certain parts of the circuit for auto gain and calibration routines.
Because of MCU limitations a new processor is currently on order for testing and the code should be able to export from the old to the new.
[edit] Items that actually work:
Single sensor platform, calibration and setpoint hardware, external hardware to MCU interface.
[edit] Updates:
[edit] Jan 1, 2011
New MCU has been selected and tested. A more advanced MCU had to be selected to account for I/O requirements in order to eliminate extra external hardware for buffer / interrupt processing.
Single leg of the sensor system has been integrated into fully functional code. The system can now respond to external hardware stimulus properly and the beginnings of total integration can now happen.
Next step will fully implement auto calibration and sensor measurement coding to capture noise event location.
[edit] Jan 7, 2011
Auto calibration / set point circuit has been soldered to a breakout board
Goal is to create two prototype boards, one which is complete, and the other will contain the sensor interface, MCU and glue hardware for the MCU.
A possible third smaller board might be made to have all the various power requirements broken out.
After all of the required prototype boards are complete, development will move into the final MCU / PC coding phase.
[edit] Jan 15, 2011
MCU and glue hardware board soldered. Next step is to integrate the sensor / power supply board, MCU and the Auto Cal/set point board together and do the first hardware run with the complete system wired.
After full hardware integration and test runs for MCU receipt of sensor data, major programming shall start.
[edit] Jan 23, 2011
All hardware circuits wired. Software testing and initial system testing next.
[edit] Feb 12, 2011
Hardware integration complete with auto calibration and sensor set routines now fully operational. Final hardware design changes in place and the actual operational / PC code programming can now start.
