Bench thermometer (CB20501E)

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

VFO using a Varicap (CB411)
This VFO (Variable Frequency Oscillator ) has the output frequency controlled by a potentiometer....
Dwell Meter (CB4961E)
This circuit is from the time when cars used contact breakers. This 80's version measures the dwell...
MCP1501 Buffered Voltage References (COM080E)
August 2016 - Mouser Electronics already has in stock the new MCP1501 voltage references from...