Found in Linear Technology documentation, this amplifier requires a symmetrical power source and its gain is given by the components according to the formula in the diagram.
The MC15555 of this circuit is the old version of the common 555. What this circuit does is...
We find this circuit in an American 1980s documentation. The circuit can still be assembled...
This circuit triggers an LM380 oscillator, producing an audio tone with light falling on the LDR....