> Jason White wrote:
> Hello All. I'm currently working on a project that requires me to use
> 2 1:16 multiplexers to interface with various peripherals due to
> limited I/O. I'm curious how much (RC?) filtering would be required to
> make a short fast pulse (eg. 1-10khz 1-5% duty cycle) a suitable
> signal to drive a relay.
> Thanks
>=20
> relay: odd Chinese 20A H-Bridge relay on hooked up via opto-coupler, No
> other specs multiplexers: CD74HC4067M MCU - 16f690

Just a suggestion, you might get a lower part count/space/cost solution if =
you=20
instead look at cascaded serial shift registers (74HC165, 74HC595 etc) for =
output=20
expansion. Then you won't need R,C & possibly no FET either. I'm sure there=
 are=20
examples at piclist.com but I can't find any right now.=20

--=20
Brent Brown, Electronic Design Solutions
16 English Street, St Andrews,
Hamilton 3200, New Zealand
Ph: +64 7 849 0069
Fax: +64 7 849 0071
Cell: +64 27 433 4069
eMail:  brent.brown@clear.net.nz


--=20
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