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Boe-Bot and Shield-Bot robots use Parallax Continuous Rotation Servos,
which require 4–6 VDC for operation. Setting the jumper so that these servos
are powered from Vin will power the servos with the 7.4 V input, which is
above their manufacturer's maximum specification.
The ActivityBot robot uses Parallax High-Speed Continuous Rotation Servos,
which require 6‒8 VDC input. Your servo jumper must be set to Vin, not 5V, to
operate these servos. If your robot is already built and tested, you should
have already set the jumper to Vin during its assembly.
Step 2. Remove the AA batteries from your robot.
Step 3.
Remove the (4) screws mounting your board to the chassis, then disconnect your control
board. Leave in place the (4) standoffs your board was mounted on (Figure 1).
Step 4. Remove the two drive wheels and the tail wheel ball from your robot.
Step 5. Turn the chassis over so that it is oriented as shown below in Figure 2. Remove the (a) 4-cell
or (b) 5-cell AA battery holder by loosening the two flat-head screws and nuts or standoffs that
attach it to the chassis. NOTE: If you needed to remove two standoffs to remove the
battery pack, you must reattach the standoffs before continuing to Step 6; these
mounting holes will become inaccessible once the Li-ion pack is installed.
Copyright © Parallax Inc.
Disconnect the board by
removing all 4 mounting
screws, but leave the standoffs
attached to the chassis.
Figure 1 – Remove Control Board
Li-ion Small Robot Power Pack-Charger (#28988)
v1.2 3/3/2015 Page 3 of 10
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