[GreenKeys] End of line handling (was C-64)

[Dave Horsfall]

On Sat, 5 Sep 2015, drlegendre . wrote:

> Relays..
> A small current controls a second, larger current.. sounds familiar. 

Heh heh.  I get a kick out of circuits whereby a teensy CMOS thingie ends 
up controlling 240v (110v for the Americans[*]).  On the same board.

Warnings everywhere, massive separation on the PCB, etc...

> Can be configured as logic gates, including the NAND gate.. any logic 
> gate can be built up from NAND gates.. any logic block can be built up 
> from the available selection of logic gates.

You forgot the NOR gates!  Poor little things always get ignNORed...  OK, 
it was a terrible pun.

> Now how exactly is that "all relays = no electronics"? ;-)

Well, the electrons have to go somewhere...

> It's just one of those things that bugs me, like when folks describe 
> anything built with vacuum tubes as "analog" - and conversely, anything 
> built from solid-state as "digital". 

I've always referred to valves ("toobs" for the Americans) as "hollow 
state".  Wasn't it ENIAC that was built out of something like 18,000 807 
bottles?  Of course, the MTBF was pretty awful, but at least they got the 
MTTR down over time.

[*]
What we call "high voltage" is 415v, with 11kv on the poles.

-- 
Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will suffer."
 I'll support shark-culling when they have been observed walking on dry land.