Development board for 20 pin AVR microcontrollers ( for example ATMEL ATtiny2313, AT90S2313, AT90S1200) with power supply circuit, crystal oscillator circuit, RS232 port, ISP port, 4 relays output, 4 optocoupler isolated inputs
This board can be used as ready part of you " Smart House system" or for your development project with ATMEL AVR controller. Board fully assembled and tested.
FEATURES
ICSP 5x2 pin connector for in-circuit programming with wide range of AVR ISP programmers
DIL20 microcontroller socket
status LED connected to PB4
reset circuit MC34064
Quartz crystall oscilator circuit 7.3728 MHz
Voltage regulator +5V, 78L05 and filtering capacitors
Power plug-in jack
RS232 DB9 female connector , RS232 MAX232 interface circuit with Tx, Rx signals
4 optocoupler isolated inputs with screw terminals
input status LEDs
4 relay outputs with 10A/250VAC contacts with screw terminals
output status LEDs
four mounting holes 3.3 mm (0.13")
FR-4, 1.5 mm (0.062"), green soldermask, white silkscreen component print
dimensions 87x90 mm (3.43 x 3.54")
LINKS
ATtiny2313 HEX test firmware for testing relay outputs and RS232. This firmware with interval 1.5 sec TURN ON and TURN OFF each relay output and send on RS232 (9600 baud, 8 bit, 1 bit stop) information about what RELAY output is enabled&disabled at this moment ( quartz crystal 7.3728MHz must be installed on board for correct timing of RS232)