This transistorized siren was found in the patent section of Radio Electronics magazine from March 1968. The circuit uses components from the time and has a very elaborate configuration.
This remote listening device was found in documentation from the 50's. The transistors used are...
This circuit includes an AD converter for interfacing with a microprocessor and can be used as a...
The figure shows an anti-bounce circuit among many that can be found on our website and in our...