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Issue #216 July 2008
XX Place Microchip 2007 Design Contest
’Net-Enabled Alarm Clock
by DJ Delorie
Start | System Overview | Network | Display | MP3 | ADC | Memory | Power | Software | Time | Alarms | GUI | Remote Protocols | Construction & Packaging | Smart Combinations | Sources & PDF
Figure 1
The core of the clock is a PIC24FJ64 microcontroller, which is connected to everything else in the clock: ADCs (for the switches, photocell, and volume), a SPI for the display, I2C for the EEPROMs, and an in-circuit programming jack that doubles as a serial port. The SPI and I2C signals also connect to the Ethernet and MP3 modules. (A full schematic is posted on the Circuit Cellar FTP site.)
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