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 configuration has already been found in other manuals, as the LM117 is manufactured by...
This is the radio receiver for the previous infrared alarm radio transmitter. It contains the...
This circuit, from an old publication from the 70s, can be assembled with a 2N2646 unijunction...