Universal peripheral equipment (2) - serial digitizer

Have you ever wished it were possible to read analogue voltages on your computer while sighing in dismay at the intricacies of bus connecting the design of your choice? This design of an eight-channel analogue-to-digital converter board goes round the hardware problems by utilizing the computer"s serial I/O port, and so becomes a universal unit for straightforward incorporation in almost any type of computer system. It is perfectly understandable that many users of home computers are hesitant about embarking on wiring peripheral equipment direct to the internal bus configuration of their expensive computer. Most expan- sion boards therefore employ the parallel (Centronics) port for com- munication with the computer. How- ever, when a printer has already been hooked up to this outlet, inter- facing becomes a problem in many cases. For less obvious reasons, the serial communication capability of the home computer"s RS232 port is often disregarded as a means for two-way communication...