I2C Input Output Module
From Ywiki
This project is part my robot project called Maggie. Maggie used analog infrared distance sensors from sharp: GP2D12. To make it also possible drive some leds from the same module I could not use a standard I2C A/D converter. So I build my own universal Input Output Module (IOM) with I2C. The main features of this project are:
- Configurable address (multiple devices on the same bus)
- 8 Programmable IO pins
- Programmable via I2C
- All pins can be programmed to be digital input
- All pins can be programmed to be digital output
- 4 pins can be programmed to be analog input
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Hardware
Schematics
The schema is build around a standard micro controller from Microchip. For the microntroller I used a PIC16F88. This controller has a few features why I've choosing this one:
- Internal RC oscilator
- Low cost
- I2C support
- Available for me in SMD
PCB
The PCB is a professional made one. I designed it myself and let manufacture in China. This way I get nice looking PCB without high costs.
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software
I have uploaded the source file to this wiki. here I've also uploaded a compiled version of this software: here
protocol decription
protocol is to be described
If you have any questions please send me a email.
