This circuit, which can be used as a shield, was found in American documentation from the 1970s. This configuration appears elsewhere in this section from other sources.
This circuit was found in a 1971s English magazine. We can still assemble it using BC548...
This circuit simulates a unijunction transistor with two bipolar transistors. We found it in the...
When the power is turned on, the output that goes to the high Iogic Ievel is not necessarily the...