RE: [CAD_CAM_EDM_DRO] Re: Gecko Fault/Reset Manager

Just use a 7401 or 7438, it's a quad nand with open collector output.

Regards,
JJ

Be Kind, Be Careful, Be Yourself

> -----Original Message-----
> From: Matt Shaver [mailto:mshaver@...]
> Sent: Thursday, September 26, 2002 6:21 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] Re: Gecko Fault/Reset Manager
>
>
> On Thursday 26 September 2002 03:52 pm, you wrote:
> > Just didn't know if I could parallel the gates
> > output.
>
> You can't wire-OR together the outputs of the 7400, you need
> to connect each
> NAND gate output (that you're using) to the input of a 7407 Hex Open
> Collector Buffer. The outputs of the 7407 can be connected
> together, and that
> signal needs to be pulled up to +5Vdc through a 1k-10k resistor:
>
> Obligatory ASCII Schematic (view in fixed width font):
>
> Xidx -\
> =|)o--|>-+-/\/\/\/-O 5V
> Xhsw -/ |
> |
> Yidx -\ |
> =|)o--|>-+
> Yhsw -/ |
> |
> Zidx -\ |
> =|)o--|>-+
> Zhsw -/ |
> |
> O To Home Input
>
> =|)o- 7400 NAND Gate
> -|>- 7407 Open Collector Buffer
>
> Good Luck,
> Matt
>
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