This guitar effect circuit was found in a 2002 documentation. The circuit can be powered by a 9 V battery as it has low consumption. The connections of the input and output audio signals must be shielded.
In the figure we have the receiver of a sequential remote control operating at a frequency in the range of...
This circuit is from an American 1967 documentation and can be implemented with modern equivalent...
We found this circuit in a French publication from the 1980s. The coils L1 and L2 are formed by 4...