User:Djxvillain/ENES-100/project 3/CDIO

Access Control
Create a mechanism so when you knock on a door in a specific pattern, it will open.

Arduino Program
Pre-made Arduino program that takes the input from knock and output to motor found here.

Input Sensor
Tried attaching mic to Arduino Analog input 0 through cell phone jack and wires. This was unsuccessful. Knock program says it needs 1 megohm resistor. Knock program responds to knock sound and will light up LED.

Audio Jack to Arduino
To connect the audio jack to the Arduino we first needed to test which part of the audio jack was related to the ground, and which to the signal. To test this first we took the end of the mic with the audio input and did a continuity test with a multimeter on the tube, and we found the corresponding port on the other end. We then did the same with the tip of the audio input.

Next Steps for Mic

 * Add amp between throat mic and audio jack. We need the output from the mic with the amp to be between 4 and 5 volts. These following schematics and instructions will be followed for the installation of the amp.

Door Mount
Goal was to attach board to door. Additional work found here.

Harness to Board
There were previously drilled holes in the board for the harness, but they needed to be bigger. The harness hook measured .351 in, but ultimately the hole was created with a .422 in drill bit.

Board to Door
Tested the board and harness on door. There was a large gap. This is a problem, because the mount needs to be very stable. Needs stabilized.

Stabilizing Mount
To stabilize mount, bumper was needed. Used skateboard wheels, they were good thickness and provided friction on door because of their texture. This was tested and works perfectly.