🚀 go-pugleaf

In article <845933481.19107.0@intra.demon.co.uk>, Paul
<paul@intra.demon.co.uk> writes
>I am looking to switch on/off various pieces of equipment by writing
>software routines to interface between the com port and the equipment.
>
>I have noticed when I open the com port the voltage across certain pins
>increases from zero volts to 20 volts. Is there any way of utilising
>this voltage increase to 'control' equipment.
>
>Initially I am just looking to switch on/off a 6V cassette recorder but
>eventually I would like switch on/off some 3 phase (330V) stepper
>motors.
>
>I have seen the 64 channel i/o controllers as advertised by Maplins at
>�80 but I have no real idea how they work. What are 64 channels needed
>for ?  It appears that other hardware is also required, like relay
>boards. The relay boards at �120  appear to only operate at relatively
>low power consumption (120V 2amp). Surely there must be some cheaper way
>of getting a PC to switch on/off a cassette recorder than �200.
>
>Any pointers ?
>
Hi Paul.

Take a look at the Maplin Cat. page 587. Code LT62S (kit) or LP85G
(built). 8 bit I/O serial module, comes with simple written programmes
to control 8 lines as all input or all output or a combination of input
and output, all outputs are TTL or CMOS compatible and are easy to use
to drive relays etc. And its cheap.

Regards.
-- 
George.