New pcb design for S-100 prototype board available

Dan ragooman at
Sun Jun 3 14:59:40 CDT 2007


That jumper is simple enough to put in there.
I could even add a note in the silkscreen on how to jumper this.
Any other power circuitry would have to be left up to the user.
I like to stick with the basics for now.


[ My Corner of Cyberspace ]

Chuck Guzis wrote:
> On 3 Jun 2007 at 12:46, Dan wrote:
>> I was trying to convey that point about the filtering, which is one 
>> reason why to have a higher output voltage on the transformer, eg. 10v 
>> versus 8v...
> Dan, why not just include a couple of pads for a jumper around the 
> 78xx, just in case the user has a regulated supply? AFAIK, that would 
> definitely be a minority of S-100 systems deployed.  I suppose one 
> could, for the 5 volts, add an overvoltage crowbar circuit or even 
> just a 6v zener and fuse if leaving the jumper on by mistake was a 
> concern (which it probably shouldn't be).
> Cheers,
> Chuck

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