Addition:
a + 0 = 0
a + 1 = 1
a + a = a
Where: a ? 0
Multiplication:
0 x a = 0
1 x a = a
a x a = a
The transistors are 2N918, 2N3464 and other RF equivalents of the time for Q1. For Q2, 2N3399, 2N2894...
This circuit, which can be used as a shield, was found in a 90s Electronic Design. The circuit...
This interesting intercom circuit was obtained from an Argentine publication from the 1970s....