Variobot varikabi Instructions Manual page 77

3) Capacitor-Set
With this expansion set, you give your little robot
a kind of short-term memory, making varikabi's
behavior even more versatile.
In addition, you can replace your colored LEDs with
the special red/blue LEDs. These light up in both
directions, so they never need to be reverse-poled
again.
The setup of the various circuits is described in
detail in a separate manual.
Discover four exciting ways you can use the two
capacitors and additional resistors for your
varikabi:
1) Take It Easy
With the built-in capacitor, it takes a while for
varikabi to decide to stop and start moving again.
2) A Drunken Robot
Because varikabi reacts slowly, it now moves in a
serpentine pattern.
3) Skittish and Trusting
This circuit combines the brake and acceleration
modes with a time delay, and the LEDs light up
blue or red respectively.
4) A Wobbling Dachshund
The left and right motors are alternately switched
on and off.