E)
We found this circuit in a PE Hobbyst Handbook from the 90s. The components are common, except the Geiger tube. The transformer is also a component that requires care when choosing.
This circuit was originally used in a 1989 documentation presence simulator. The circuit activates...
The diagram of this source appeared in a 1982 American publication, drawing attention to its...
This circuit is from 70's documentation. The converter used is not a common component today. |...