Relay driver (CB20549E)

Found a documentation on PCs from 1996, this circuit can be used as a shield. The relay is rated at 100 mA of coil current.

Sampling and Holding LM110 (CB20156E)
This is another sampling and holding circuit found in a factory manual from the 1980s. The circuit...
12V Battery Charger II (CB19200E)
This charger was found in an old Motorola manual using an SCR from this company, which, however, can...
Twin-T Oscillator Using the 741 (MSB034)
Twin-T oscillator are designed to produce sine low frequency signals. These oscillator are...