COSMAC Elf switch panel using PCBs

dwight dkelvey at
Sat Apr 23 18:09:15 CDT 2016

Lf it were mine to make, it would be a spring return
momentary SPDT. NC would be ground and NO would be +5V,
as per the schematic.
I'm not sure what the manual says about it.
It is debounced with a jam latch, as per schematic.
Tinker Dwight

From: cctalk <cctalk-bounces at> on behalf of Eric Smith <spacewar at>

On Sat, Apr 23, 2016 at 11:28 AM, dwight <dkelvey at> wrote:
> I looked at the schematic pdf and it looks right.
> The ground lead is the NC.

It's an SPDT toggle. Neither the NC or NO pin of the switch should be
tied to ground; it's the common pin that's grounded. So for a toggle
switch, which side is NC and which is NO?

Anyhow, apparently if I'd read it more carefully, it is explained in the manual.

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