APE (Arduino, PIC, Extender) Thoughts on a new kit in deveopment

[blueroomelectronics]

I'm just finalizing the groundwork for a new kit in the works. I enjoy sharing the thought process and of course look forward to any feedback comments you may have.

Name: APE
Description: I'm putting this kit together as an I/O expander for Windows, WHS, Linux & MAC computers. And for the first time in a Blueroomelectronics kit it can be built with support for either an Arduino 28pin DIP, 18F2550 DIP microcontroller or even just an FT232R and no microcontroller.

The APE can be assembled in a variety of ways. The basic device will have
USB slave device (FT232R AVR), (USB 18F2550 PIC)
6 Relays
4 Opto Isolated inputs
RS422 or RS485 communications
315 or 433 MHz RX module
9V - 15VDC supply

All hole through parts EXCEPT the FT232R (SOIC)
Originally I was going to use an Arduino Mini to avoid having any surface mount parts but because so many parts are common between the PIC and AVR versions it was easier just to put an Arduino compatible layout on the board. This also allowed for a very basic microcontrollerless version using just an FT232R for control (the FT232R has 5 generic I/O pins that could be used to drive relays or read the opto isolators)

I'll post schematics & more info in the following days.

 

[blueroomelectronics]

Update on the design.
Scrapped the USB port in favor of a simple RS232 port.
Can be built with one of three CPUs, Arduino, PIC2525, dsPIC33F3013
The dsPIC has two UARTs, the 8bit CPUs have only one so you'll have to bit bash the RS485 or RS232 (jumper selectable)
6N138 optos (high speed) useful for MIDI... (not sure if it's worth keeping)
The dsPIC has very fast UARTs (fast enough for DMX via the RS485 interface)