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Unformatted text preview: Hand I Justin Zakhar Senior Capstone Project Revision History: 10-28-07 I decided to use a comparator instead of an ADC. 11-5-07 I have updated how my flex sensors will interface to the 8051. I will be using voltage divider. I also updated my Bill of materials. 11-19-07 Updated parts list including LM339N comparator. 11-06-07 Updated parts list, decided on Serial connection instead of PS/2, also updated spec sheet. Hand I Project Description: My project will be a keyboard and mouse combination using only your hands. This will work by moving your fingers and triggering one of 5 flex sensors on each hand. This will then send a binary code integer to the 89C51RB2. It will then interface with the Serial port to be output onto a computer screen. I will use embedded code as my programming code with the 89C51RB2. The mouse will use an accelerometer (x,y axis) and your right hand will perform as a mouse in real time. This project is important to MerriTechCo because it has never been tried before. Sometimes you have to think outside the box. I am also doing something even though it is not improving a product; it is creating a design that in years to come may be the stepping stone to a whole new way of computing. That is why this product is marketable and interesting. Keyboard: You will flex a certain finger and that will fold the flex sensor. Lets say you want to output an A onto the computer screen. You will flex your thumb. This will create a resistance anywhere from 15000 Ohms to 50000 Ohms. 35000 Ohms is a 90 degree flex of the flex sensor. My sensors have the ability to flex 360 degrees. I will be using a voltage divider into a comparator. The comparator will wait until the sensor is flexed, voltage divider into a comparator....
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- Spring '08