This circuit has an interface for a multimeter or electronic voltmeter. We found it in a 90s Electronic Engineering. The sensor is an unusual component today.
This circuit keeps the neon lamp on for a moment when it receives a pulse. The turn on time...
This circuit was obtained from an English magazine from 1976. What this circuit does is start from...
We found this amplifier in a publication of 1990, but it can be mounted today with some exchanged...