You must be careful subbing 74 series parts here for CMOS.  This device
is powered
by stealing power from the Printer Port by using data output lines to
charge a cap.  Therefore VCC will never be a true 5 volts.  Depending on
the PC, this stolen VCC will always be less than
5 volts, it could fall as low as 3 volts on some PCs.  That is the reason
the author/designer
chose to use CMOS devices, because they can function on this lower
voltage.  74HC parts
require a good solid 5 volts.  While I am subbing 74HC parts in my
version, I am also NOT
using the steal power from the port method.  I will provide the ICs with
a separate 5 volt power
source.

 --- Steve




>At 01:44 PM 12/9/96 -0200, you wrote:

>Looked them up on DigiKey and found the 74 series equivalents:

>> HCF4060BM - 14 stage oscillator-divider

 >74HC14

>> HCF40106BM - CMOS hex Schmitt Trigger

 >74HC4060

>Looking at the schematic and my CMOS data book, these parts should be
>equivalent.

>Thanks for the tip.

>
>Try Digi-Key al http://www.digikey.com they have both of them.
>
>Octavio