Datasheet

Table Of Contents

revolution

BOT120.PMD

BOT120 PICAXE-20X2 MICROBOT

Assembly 8 - Pen Holder, Servo and SRF005 Modules

Note that the pen holder and line tracker cannot be used at the same time as

they both use the centre position, and share the same 14mm posts and brics.

The pen holder is used to hold a small pen (not supplied) between the

wheels of the microbot, so that the microbot can draw patterns and leave

a ‘trail’ on a piece of paper.

These instructions assume the line tracker is currently fitted.

Connect a bric to the pen position on the top of the pen holder module

by using two nuts/bolts (do not place a nut bolt in the centre position of

the bric - this is where the pen is inserted!). Note that the text ‘Pen

Holder’ is on the opposite side to the bric.

Remove the line tracker module from the bottom of the support posts by

removing the 3 bolts.

Replace with the pen holder module, so that the pen position is

mounted between the two gearboxes.

The pen (not supplied) is made by cutting down a cheap disposable

‘biro’ type pen. Remove the centre ink assembly from the pen and cut it

to length using a pair of scissors. Then wrap a few turns of sellotape

around the pen until it can be pushed securely into the centre hole of the

mounting bric. The correct fit can be tested using a spare bric as shown.

Servo Module

The BOT120 motherboard panel also includes a servo module labelled

as “Servo”. This can be used (with the loose 3 pin header also supplied)

to connect a servo if desired.

Please see the BOT123 section of this manual for more details.

SRF005 Module

The BOT120 motherboard panel also includes a SRF005 module

labelled as “SRF005”. This can be used to connect a SRF005 Ultrasonic

range finder module if desired (purchase separately).

Please see the SRF005 section of this manual for more details.

Fully Assembled Microbot

Congratulations – You should now have your Microbot fully assembled.

Your Microbot has been fitted with motors to move about, a bumper to

detect collisions, a line tracker so it can follow paths, two LED eyes, and a

piezo sounder to make sounds.

You are now ready to start using your Microbot! Before use remember to

insert 3xAAA batteries (not supplied)!

Suitable flowchart and BASIC programs are provided in the next part of

this document, as are details of adding additional modules such as a

servo and an ultrasound range finder for detection of objects in the way.