Serially controlled board wit 29 I/O lines
I know - COM ports are quite obsolete, it is still used in many embedded projects. This one is a simple serially controlled I/O board with 29 lines that can be configured to control anything like from stepper motors, relays and other automation appliances.

The board constructed around z8 microcontroller which is quire rare in embedded projects. Despite of 29 I/O lines serial I/O board has some special features like programmable pulse generator, incremental encoder switch input, 3 counter registers, I/O port memory registers. Each I/O line is LED monitored. To make control easier there is a Visual Basic Program Template available where you can set up easy interface to access all board features.
[...] The board constructed around z8 microcontroller which is quire rare in embedded projects. Despite of 29 I/O lines serial I/O board has some special features like programmable pulse generator, incremental encoder switch input, 3 counter registers, I/O port memory registers. Each I/O line is LED monitored. To make control easier there is a Visual Basic Program Template available where you can set up easy interface to access all board features. [via] [...]