This photoelectric sensor that triggers a relay was found in an English book from 1989. The transistor is a general-purpose type, and the integrated circuit consists of an operational amplifier.
Found in a PE Hobbyst in 1991, this 13.6 V power supply with a 2 A current is suitable for supply...
This signal injector and tracer (follower) was found in an old American documentation. The...
The Variable Frequency Oscillator (VFO) shown in the figure can generate signals in a frequency...