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[Ternary] Ternary Half Adder A+B=S+C 
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Joined: 09 Jan 2003 00:22
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Location: Colorado
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On April 9th 2005 I designed scheme of ternary half adder (A+B=S+C):

Image

Bill of materials (prices of 2005):

1xLM339 $0.19 - one quad comparator
2xCD4066 $0.35*2=$0.70 - two quad CMOS-switch
4x1N914 $0.022*4=$0.088 - four switch diodes
18 resistors - from $0.14 to $0.78
Totally we got from $1 to $2 for one half adder.

Functional table:
Code:
AB/CS
-----
NN/NP
NO/ON
NP/OO
ON/ON
OO/OO
OP/OP
PN/OO
PO/OP
PP/PN


31 Aug 2008 17:32
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On April 29th 2005 I created scheme of ternary element TRI31 (two ternary half adders as one card):

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31 Aug 2008 17:37
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On May 9th 2005 I got 2 PCBs (it was $80 to produce):

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31 Aug 2008 17:38
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On May 11st 2005 I built one TRI31 card:

Image

It took 3 hours to solder...

Image


31 Aug 2008 17:39
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May 12nd 2005 - testing:

Image

Image

To make it working for all input possibilities I needed to add 2 resistors 1.5 kOm in parallel with RN2G/RN2H and RN3G/RN3H...

Image


31 Aug 2008 17:44
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On June 6th 2005 I ordered production of 4 more PCBs (for $92)

Another test on June 13th 2005 using ternary testing board TRInnTest-1:

Image

Later I sent one of that PCB to Moscow and now we are waiting for pictures from Mbr who soldered it in 2008 ;)


31 Aug 2008 17:46
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10 Nov 2012 08:15
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