This sophisticated decade of benchtop resistors was found in the November 1989 issue of Radio Electronics magazine. The circuit is supposed to use precision resistors.
This protector was found in an Electronics Now from the 90s. The 250 V transient suppressors are common...
Found in an American documentation from 1969, this astounding circuitry makes a relay operate on 3 Hz...
This circuit has a 100 dB dynamic We found it in a Popular Electronics from the 90s. Equivalent...