Bench thermometer (CB20501E)

With an ultra-low consumption, this circuit can be powered by solar cells. The circuit is from a 1991 documentation.

OPA1612QDRQ1 Audio Amplifier (COM007E)
May 2016 - Mouser Electronics is sourcing the new high-performance audio amplifiers with bipolar...
Tone Burst Repeater (CB3959E)
This circuit has been found in older telecommunications documentation. The circuit switches off after...
Electronic Dice (CB4877E)
This TTL dice was found in an old American 1980s documentation, but can still be easily assembled....