This circuit was found in a publication by Edelman from 1924. The power comes from the battery and the listening is through a high-impedance headphone.
This circuit is from Dutch documentation from 1967. The circuit works with a component of the...
This circuit can be used to add a delay to a logic signal as shown by the input and output...
We found this guitar effects circuit in a 1997 documentation. As the components used are still...