This circuit was obtained from an Electronic Design of 1968. The circuit uses components of the time that can eventually be exchanged for current equivalents.
The diagram shows an AND gate implemented with an LM3900 transconductance operational. The circuit is...
The load of this circuit depends on the triac and the integrated circuit used is uncommon today. The...
The described electrifier is low cost and easy to assemble. The voltage transformer raises 12 V to...