Direction for use
The LEGO® Technic Control Set contains elements and building instructions specially developed for use in connection with a micro computer and an interface. To ensure the correct use of the materials we have stated the conditions under which the components listed below should be used:
1. LEGO sensors
the set contains 2 different types of sensors, a touch sensor and an optosensor.
1.1 LEGO optosensor
This sensor has been specially developed for use together with a LEGO Interface. The optosensor connects to the LEGO Interface by means of an ordinary LEGO lead, plugged into one ofthe input sockets marked 7 and 6. The optosensor is able to function as a reflection sensor - together with the counting disk (revolution counter) as well as with a yellow brick (position indicator). Furthermore it can be used together with an external light source, the 4.5 V LEGO light brick. When connected the optosensor is supplied with current from the interface, and functions as a digital sensor registering the change between light and dark.Note:
To protect the electronics the optosensor must not be connected to more than 9 V DC.
1.2 LEGO Touch sensor
The touch sensor connects to the LEGO Interface by means of an ordinary LEGO lead, plugged into one of the input sockets marked 6 and 7.When the grey button on the touch sensor is pressed it makes an audible sound and the green light on the corresponding input port is turned on.
2. 4.5 V DC LEGO motor
This motor was developed specially for use with the LEGO Technic Sets. When used together with the LEGO Interface, the motors can be connected in two ways:- To work in one direction only. The motors can be plugged into one of the output sockets marked 5, 4, 3, 2, 1,and 0 - by means of an ordinary LEGO lead. The fixed direction can be reversed by turning the plug on one end of the lead - either on the motor or on the interface.
- To work in either direction. The motor can be plugged into one of the output sockets marked A, B or C. Change of direction can be operated by the computer, or by turning the plug on one end of the lead - either on the motor or on the interface.
The motor runs only off DC from a battery or a power pack and works at a voltage of 3-4.5 V. It uses a current of about 0.1 A when not loaded and runs at about 6,000 r.p.m. with new batteries. When it is driving a heavy load it will take up to 0.4 A and when it is stalled up to 1.0 A. As this can damage your motor by overheating it you should avoid stalling the motor.
3. LEGO Leads and Plugs
All electrical connections to motors, light bricks and optosensors are made by means of ordinary LEGO leads. The leads in this set have been provided with special plugs on both ends. The plugs fit the stated components as well as the LEGO Interface, etc. The plugs are not polarised and can thus be turned as you wish. It is possible to connect two or more plugs together by using the holes on the side of the plug.
