This circuit was found in 1980s American documentation. The transducer is a piezoelectric capsule and the power supply voltage can be between 3 and 18 V.
This circuit is from a documentation on Motorola interfacing techniques from 1975. The Darlington may be...
This circuit is from an old Electroics Now. Its purpose is to protect the fax and modem lines of...
This 8-channel converter was found in a 1970s American documentation. The integrated circuits used are...