Ethernet Stepper Relay Controller

Controller

We've selected the Atmel ATmega line, and specifically the AT90USB controller. We've got an Atmel demo board.

This usbfoo board (or bumble-b) seems much more suitable due to it's nicer 100 mil pads (the Atmel board uses 50 mil pads).

Possible I/O

• MAX4822/MAX4823 SPI relay driver
• MAX6950/MAX6951 SPI LED display driver
• ENC28J60 SPI ethernet controller
• SIP relay
• 6N138 optocoupler
• MID400 optocoupler AC

H-Bridge Driver

• Getriebemotoren Ansteuerung
• Discrete H bridge
• ST L298 Dual full-bridge driver
• ST L6203, snubber network app note
• MC33879 Configurable Octal Serial Switch with Open Load Detect Current Disable
• BTM 7810K
• TLE2006 half bridge

• BAT48 or BYV27-200 recovery diode

Software

• GCC in the avr-gcc cross compiler variant.
• dfu-programmer, to load the software on to the hardware via it's USB interface
• avrdude, to program the software in to the hardware
• simavr, a simulator with GDB support
• AVR libc, basic C library
• LUFA, USB library for AVRs

Links

• µC forum (German)
• big seven-segment display over SPI
• Quick AVR little AVR board perfect for putting on a breadboard