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 signal follower was obtained from a Raytheon manual from the 1960s. The transistor is made of...
This circuit was obtained from a 1978 English magazine. This circuit can be easily assembled. We...
Found in a 90s American documentation, this circuit mimics the Enterprise warning signal from the...