This circuit was obtained in a 1967 Electronics World. The components are still common today, the SCRs can be replaced by equivalents and the unijunction transistors the 2N2646.
This circuit was found in a Ferranti documentation from 1969. The transistors are common types of...
This circuit was obtained in a Hands-On Electronics from the 90's. The circuit turns on one LED at...
The presented circuit generates short pulses using a relaxation circuit with two complementary transistors...