This circuit is from 1999 documentation. However, it can still be easily assembled, as all components used are common. The sensors can have their quantity increased, being connected in parallel.
This circuit detects traffic problems on a miniature railway by triggering an alarm. The circuit was...
This circuit was suggested by General Electric in 1969 documentation. It provides a maximum output of...
Found in Popular Electronics from the 90s, this circuit can generate signals from 1 to 10 MHz...