A collection of circuits for driving two LEDs from a single microcontroller pin. Combinations include different color LEDs and different operating voltages for the microcontroller. Click Driving LEDs.cct.zip to download.Schematics_files/Driving%20LEDs.cct.zipSchematics_files/Driving%20LEDs.cct_1.zipshapeimage_2_link_0
A simple schematic for interfacing Maxim’s 1-wire products to a standard 9 pin serial RS-232 port. Includes a little program for very basic operations. Click Maxim 1 wire interface.cct.zip to download.Schematics_files/Maxim%201%20wire%20interface.cct.zipSchematics_files/Maxim%201%20wire%20interface.cct_1.zipshapeimage_3_link_0
An 18 key keypad that only uses three microcontroller pins. Supports three key chords for special/secret keystrokes. Requires a microcontroller with 10 bit A/D converter. Click Keypad18.cct.zip to download. Click here to see the 1-wire keypad design software.Schematics_files/Keypad18.cct.zip1-wire_keyboard.htmlSchematics_files/Keypad18.cct_1.zipshapeimage_4_link_0shapeimage_4_link_1
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Schematic Collection

All schematics below are in Capilano’s DesignWorks for Macintosh format. More information about DesignWorks can be found here.

The schematic and layout for the RS-232 serial port breakout board designed for the Serial Analyzer software. Click Serial AnalyzerHW.zip for the DesignWorks schematic and Osmond layout. Click here to see the Serial Analyzer software page.Schematics_files/Serial%20AnalyzerHW.zipSerialPortAna.htmlSchematics_files/Serial%20AnalyzerHW_1.zipshapeimage_7_link_0shapeimage_7_link_1
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