This circuit was found in a Philips documentation from 1970. The components are of the time, difficult to find today, but the configuration can be adapted to use modern equivalent components.
This circuit was found in a Popular Electronics of the 90s. It operates a third brake light that...
I found this little signaling transmitter in old American documentation. The circuit has a good...
This sensitive amplifier for low current measurement uses a differential amplifier configuration with...