Logiblocs Super Inventor's Inventors Manual page 10

Step 6
Still working with the Logitester, replace the LIGHT
SWITCH with the IN and plug in the Jack Plug
leaving the wires loose.
will start bleeping. The IN block is
another way to trigger the blocks and is
useful for linking your Logibloc systems
to Door Alarms, Pressure Mats and even
making Lie Detectors, Metal Detectors
and Water Sensors.
10
JACK-PLUG
Hold the wires, one
in each hand and touch
the metal ends of the
wires together.
Again, the BLEEP
Step 7
Now replace the IN with the PULSE bloc. This
creates its own messages or pulses
automatically.
Experiment with altering the speed of the pulses by
twisting the knob. This block is useful for making
automatic systems that run on their own!
IN
PULSE