In Control

Karl queried:

I'm working on a project where I need to control a motor, based on the feedback from an quadrature encoder.

I'm trying to do on the fly speed calculations of the encoder but can't get my head around how to do speed calculations as I need to know the time constant between pulse readings.

Any suggestions ?

In the 15 months since its release the CC16 has become very popular. We have now upgraded the design and included a couple of new features, namely two analog inputs and a bi-color status LED. The new model is called CC18.

The analog inputs are very well suited to the new breed of sensors that produce a ratiometric output voltage between 0V and the + supply (normally 5V).

The LED is a red/green LED that can be set to light steady of blink in red, green or orange.

Everything else is exactly what you have become used to, only the 5V regulator is now flat to the board, reducing the overall hight.

More on the CC18

We have just released a new project management tool called Builder. In brief Builder makes it convenient to break large SPLat programming projects up into a number of individual modules. These modules can contain their own test code, so they can be tested independently of other modules in the project. Builder then allows you to "glue" together all your individual modules, leaving out the test code and arranging the various segments of the modules into the correct order. For example, it will make sure all the NVEM0 stuff is at the end and all mEQU directives are at the beginning, before any defBYTE (etc).

In short, builder helps you to work in a more systematic and structured way on large projects.

Builder is part of latest SPLat/PC, just released here.

Builder documentation

I was talking to a gentleman in Louisville KY yesterday, and he politely told me off because our website is not explicit enough about our custom controller offering. Not that I mind such critiques - how can we make our message clearer unless people give us feedback? Anyhow, here's a shameless plug for our custom capability:

We do make custom controllers. In fact, we make many more custom boards than standard boards, because we have some major OEMs as customers and make some of their products in very significant numbers.

Hi David Please --- is there provision on the MMi202 Board of a voltage supply to run the 0-20 mA current loop. I have a PT100 transmitter/amplifier which will run from 10 to 30v and is powered by the current loop itself and would like to be able to use this thing for temperature sensing for control. many thanks cheers