VACS:Projects:Software:Ebcs

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Revision as of 22:31, 1 June 2006

Contents 1 Overview 2 EBCS Components 2.1 IO Board 2.2 Power Supply and Triacs Board 2.3 LCD Board 2.4 68HC11 Board 3 EBCS Simulator 4 Resources

Overview

The Embedded Bathroom Control System is a small system based on a 68HC11 and designed to:

• Control the bathroom fan,
• Control the light,
• Control the radio (ie, music),
• Display the temperature, humidity, ...

This system has several hardware components:

• A 68hc11 board with 32Kb of ROM and 32Kb of RAM. This board runs the EBCS software.
• An LCD board which provides a 2x16 LCD display with 4 buttons.
• A Power Control board which has a transformer and 2 triacs (one for fan and one for light).
• A Sensor module which provides temperature, humidity and presence detection.
• A I/O board connected to the CPU board. This is the interface with the sensors, the power control board and the LCD panel.

EBCS Components

IO Board

The IO board:

Documentation on the chips used by EBCS IO board.

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Documentation (1)
4xxx/CD40106.pdf	Hex schmitt triggers
4xxx/TL071.pdf	Low Noise Single J-FET operational amplifiers
vreg/L7800.pdf	Positive voltage regulator (7805, 7812, 7815, ...).
transistors/BD140.pdf	PNP Silicon Transistor
transistors/BC237.pdf	NPN Epitaxial Silicon Transistor
transistors/BC557.pdf	PNP Epitaxial Silicon Transistor
aop/TL071.pdf	Low Noise J-FET Operational Amplifier

(1) Documentation publicly available on various constructor web sites and copied here for archiving.

Power Supply and Triacs Board

The power control board:

Documentation on the chips used by EBCS Power board.

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Documentation (1)
triacs/BT137.pdf	Triacs (I've used a BT137-600).
triacs/moc3041.pdf	6-Pin DIP Zero-Cross Optoisolators Triac Driver Output
transistors/BC549.pdf	NPN Silicon Transistor
transformers/myrra_45000.gif	Transformer (http://www.myrra.fr: Myrra ).
opto/4N35.pdf	Optocoupler with Phototransistor Output

(1) Documentation publicly available on various constructor web sites and copied here for archiving.

LCD Board

The LCD panel with 4 optical buttons.

Documentation on the parts used by EBCS LCD board.

Documentation (1)
lcd/hd44780u.pdf	Dot Matrix Liquid Crystal Display Controller/Driver
4xxx/CD4001.pdf	Quad NOR gate
4xxx/CD4081.pdf	Quad AND gate
aop/TL071.pdf	Low Noise J-FET Operational Amplifier
74xxx/74HC164.pdf	8 Bit Sipo Shift Register
74xxx/74HC273.pdf	Octal D Type Flip Flop With Clear
transistors/BS170.pdf	N-channel vertical D-MOS transistor
opto/CNY70.pdf	Reflective Optical Sensor with Transistor Output

(1) Documentation publicly available on various constructor web sites and copied here for archiving.

68HC11 Board

EBCS Simulator

Resources

• http://gel.sourceforge.net: GEL main site