Found in a Popular Electronics from the 90s, this game can be seen in other configurations on this site. The circuit uses components that are still common today.
This method of controlling the sensitivity of a phototransistor was found in an Electronics Now from the...
This circuit is from a 1966 documentation. The transistor is made of germanium of the time and the...
Mouser Electronics is making available the SLN-IOT-GPT Integrated Development Experience, a...