This configuration appears at several points in this section, obtained from different sources. This is from American documentation. The gain is 20 and the transistor can be a BC549.
This circuit can be used as a clok in digital applications. Power supply is 5-V and the pins for...
The MC15555 of this circuit is the old version of the common 555. What this circuit does is...
This circuit was indicated in an old American publication to serve as a Laser alarm system as a...