IQ3
by Dominic Nolan

Introduction
The IQ3 is a self-contained programmable device capable of use in a wide variety of engineering contexts ranging from simple door interlocking to production line control and robotics. The device has four outputs each capable of sourcing approximately 1 amp and two inputs that facilitate automatic switching between program sequences. It is programmed line by line simply by setting switches but has a non-volatile memory and so can be applied, if required, as a one-off programmable device like a PIC. All the key switches are paralleled by solder pads to enable fl ying leads to be connected to external switches if, for example, the IQ is built into a product. Detailed instructions and examples of programming are provided in the appendix on page 23.
The examples given in this publication demonstrate the versatility of the IQ3 board considered either as a dedicated programmable controller or a very basic PLC (programmable logic controller). The board is the lowest cost device of its type on the market and can be obtained from MUTR whose details are given on page 34.

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