This precision signal rectifier was obtained in an American technical documentation from 1975. The operational amplifiers can be 741 and the power must be supplied from a symmetrical source.
This circuit works with the previous one, generating counting pulses for random draws. The circuit is...
This circuit was found in Popular Electronics. Its purpose is to warn the visually impaired when a glass...
This circuit is from an American magazine that no longer exists, Modern Electronics, in a February...