This is a typical point scale or moving bar circuit with the LM3915. We found it in old American documentation. The operational amplifier supports an equivalent modern type.
September 2017 - Texas Instruments DRV5032 Hall Effect sensors, an ultra-low power digital switch...
This circuit was found in a documentation of the 80s, having didactic purpose. For R1 values...
This circuit is from a Linear datasheet. The circuit provides a 5 m voltage with 40 mA from an AA...