This circuit was obtained in a 1970 engineering documentation. The operational is the 741, but other operational ones can be used. The power supply must be symmetrical.
The circuit shown serves as a direction indicator or arrow for bicycles, robots and other...
This circuit was found in an 1888 publication. However, since it uses common components, it can...
Featuring low output impedance and high input impedance, this configuration was found in a 1980s...