The two integrated circuits used in this configuration can still be found. The frequencies of the effects are determined by the capacitors, which may have their values changed.
This circuit was obtained in a documentation from the 1970s. What it does is to delay trigger a...
This circuit was found in a manual of operational amplifiers. Virtually any operational amplifier can...
This integrator circuit uses the junction FETs which can also be the BF245 or MPF102. The...