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[Ternary] Ternary testing board TRInnTest-1 
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Joined: 09 Jan 2003 00:22
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On June 13rd 2005 I finished 5-day building of ternary testing board to test our "standard" ternary elements with 12 and 24 pins:

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This is testing of TRI31 double ternary half adder:

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P.S. Russain topic about this board: http://www.nedopc.org/forum/viewtopic.php?t=51


31 Aug 2008 17:56
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Board uses 18 "ternary" mechanical switches, 9 "ternary" red-green LEDs, 27 resistors and 18 bipolar transistors (9 PNP and 9 NPN). Scheme consists of 9 identical blocks:

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Lower 9 pins of TRInn elements may be inputs or outputs ("IO" on the scheme). Higher 9 pins are usually inputs ("I" on the scheme). Improper usage of that board may cause short circuit of power supply - if ternary switch wrongly will connect +5V or -5V to output pin when tested board will provide -5V or +5V to the same output. So all switches that connected to outputs MUST be in neutral position! As defense against this condition we can put additional 1K resistor before every IO.


31 Aug 2008 17:57
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10 Nov 2012 08:16
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