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Technical Specs

The AP Controller currently has the following specifications (subject to change until final hardware is done).

  • Host: Arduino MEGA 2560 (R3)
  • Memory: 256 kilobytes FLASH (ROM), 20 kb RAM, 4 kb EEPROM
  • Connections: Power, Maxim 1-wire bus (screw terminals), relay power/signal, LCD (HD44780 compatible), RTC, reset switch, analog sensor/probe connections.

The hardware is designed to to be modular, so each user can add just the components they need to cut down on cost.

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Form Factor

We have the circuitry designed and are about to build a prototype. Our original design was from scratch using a Z80, but doing everything from scratch was going to make the unit way too expensive to build, so we've taken a different direction now. We are instead making a shield for Arduino Mega 2560 and using existing cheaply available modules to buld the system. For example a real-time clock board that is only about $7 and an optoisolated 8 relay board for
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