This boost amplifier was found in a Popular Electroniics from the 90s. The circuit operates up to 20 MHz depending on the coils used.
This is the basic configuration for using the ULN2001 and MC1441 and others of the same series in...
This interesting effect circuit was found in a 1982 publication. The sequence of musical notes is...
This circuit, published in the 1980s, can be applied to operational amplifiers of almost any type....