AVR I/O Board, 4x Relay, 4x Opto Inputs, RS232, ISP

Description

AVR I/O Board, 4x Relay, 4x Opto Inputs, RS232, ISP
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AVR-IO
Development board for 20-pin AVR microcontrollers with 4 relay outputs, 4 optocoupler isolated inputs, RS232 serial interface (Rx/Tx) and on-board 5V voltage regulator. A 10-pin ISP connector allows programing using an STK500 compatible programmer.
The board ships completely assembled and tested, but does
not
include an AVR microcontroller.
AVR I/O Board Features
4 Optocoupler isolated inputs with screw terminals and input status LEDs
4 Relay outputs with 5A/250VAC contacts with screw terminals and output status LEDs
Status LED connected to PB4
DIL20 microcontroller socket
5x2 pin STK500 compatible ISP connector
(top view on target board) for In-System Programming with an
AVR ISP Programmer
RS232 interface circuit with Tx, Rx signals and DB9 female connector
5.5mm/2.1mm coax power plug-in jack
Voltage regulator +5V, 78L05 with plug-in power jack for use with a single 12VDC power supply.
Quartz crystal oscillator circuit 10 MHz
RESET supervisor IC ZM33064 with 4.6V threshold.
FR-4, 1.5 mm (0.062"), green soldermask, white silkscreen component print, four mounting holes 3.3 mm (0.13")
Dimensions: 100 x 80 mm (3.9 x 3.15")
AVR I/O Board Schematics
Supported AVR Microcontrollers
AT90S1200
AT90S2313
ATtiny2313