LED Flasher Unijunction (CB22144E)

The frequency of this circuit depends on the capacitor. The unijunction transistor can be the 2N2646.

AND gate LM3900 (CB19126E)
The diagram shows an AND gate implemented with an LM3900 transconductance operational. The circuit is...
Differential Power Comparator (CB20122E)
The load of this circuit depends on the triac and the integrated circuit used is uncommon today. The...
Electric Fence (CB18051E)
The described electrifier is low cost and easy to assemble. The voltage transformer raises 12 V to...