This circuit amplifies signals from 0.5 Hz to 300 kHz. We found it in an old documentation. Equivalent transistors may be used. The gain is 20 dB.
This relay circuit was found in a 90s American documentation. The transformer windings are...
The indicated circuit is an intermittent one in which we use two 555 integrated ones, one as a low...
Found in documentation from the 1980s, this circuit uses an operational amplifier from that time....