This configuration was found in the Texas Instruments optoelectronics manual. PNP transistors support equivalents and the phot transistor does.
Obtaining a voltage that is proportional to a current drained by a load can be important in...
This circuit is from the 1983 Intersil Databook. The circuit operates on a 9 V battery and has a...
This configuration appears elsewhere on this site with circuits obtained from other sources. This...