AVR-IO-M16 development board Users Manual Rev.A, July 2008 Copyright(c) 2008, OLIMEX Ltd, All rights reserved INTRODUCTION : AVR-IO-M16 is small but powerful board, perfect for small automation projects. The board has four Relays with 10A/250VAC current switching capabilities, four opto-isolated digital inputs and RS232 port. One of our demo software shows how easy it is to control the inputs and output by PC computer through the RS232 port. BOARD FEATURES: - ATMega16-16AI AVR microcontroller - ICSP 5x2 pin connector for In-Circuit Programming with AVR-PG1, AVR-PG2, AVR-ISP500, AVR-ISP500-TINY, AVR-ISP500-ISO or other compatible to 10 pin ICSP layout - JTAG 5x2 pin connector for in-circuit programming with AVR-JTAG, AVR-JTAG-USB or other compatible to 10 pin JTAG layout - Status LED - Reset IC ZM33064 - Quartz crystal oscillator circuit 16MHz - Voltage regulator +5V, 7805 and filtering capacitors - Power plug-in jack - RS232 DB9 female connector , RS232 and interface circuit with Tx, Rx signals - 4 optocoupler isolated inputs with screw terminals - Input status LEDs - 4 relay outputs with 5A/250VAC contacts with screw terminals - Output status LEDs - One user status LED - Four mounting holes 3.3 mm (0.13 ) - FR-4, 1.5 mm (0.062 ), green soldermask, white silkscreen component print - Dimensions 80x100 mm (3.9 x 3.15 ) ELECTROSTATIC WARNING: The AVR-IO-M16 board must not be subject to high electrostatic potentials. General practice for working with static sensitive devices should be applied when working with this board. BOARD USE REQUIREMENTS: Cables: RS232 straight male-to-female DB9 cable (Note: this is not a null modem cable) Hardware: Programmer: AVR-PG1, AVR-PG2, AVR-ISP500, AVR-ISP500- TINY, AVR-ISP500-ISO or other compatible tool Debugger: AVR-JTAG, AVR-JTAG-USB or other compatible tool Software: AVR Studio + WinAVR free C compiler and debugger can be downloaded at avrfreaks.org web site