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sparkey

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Joined: 15/06/2011
Location: Australia
Posts: 819

Posted: 12:23pm 21 Jun 2011

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in gizzmo notes he stats that pins1-0 are anolouge and pins 11-20 r digital ..but i read elsewhare that the pins can be set into 3 different modes ..regards brian//...i have the three silicn chip mags but they dont really tell me a lot of great deatail ....

technicians do it with least resistance

stuarts

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Joined: 15/06/2011
Location: Australia
Posts: 194

Posted: 12:45pm 21 Jun 2011

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Sparkey, analog is only available on pins 1 to 10. if yo try to set pins 11 to 20 for analog input, it generates and error.

have a look at the version 2.4 manual from Geoff's site. I clears things up quite well.

Stuart

Time is nature's way of keeping everything from happening all at once.

Gizmo

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Joined: 05/06/2004
Location: Australia
Posts: 5031

Posted: 12:45pm 21 Jun 2011

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Hi Brian

Have you downloaded and looked at the manual? You can download it from http://geoffg.net/maximite.html, it will answer most of your quesions. Look up the SETPIN command.

Pins 1 to 10 are the only pins that can be configured to read analoge voltage, Pins 11 to 20 can be configured to read period, frequency, count. All pins can be used as interrupts, and all pins can be used as digital outputs.

Glenn

The best time to plant a tree was twenty years ago, the second best time is right now.
JAQ

sparkey

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Joined: 15/06/2011
Location: Australia
Posts: 819

Posted: 01:31pm 21 Jun 2011

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sorry guys yes i did read the mm and also have gone over the sillicon chip mags unfortanatley i only just now realised that i got the 10 pin expander and not a 20 pin one whell hopfully it should be here tomorrow and i will modify the connector cable its a bit harsh though ...regards sparkey...thanks

technicians do it with least resistance

rhamer
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Joined: 06/06/2011
Location: Australia
Posts: 174

Posted: 11:34pm 21 Jun 2011

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sparkey said sorry guys yes i did read the mm and also have gone over the sillicon chip mags unfortanatley i only just now realised that i got the 10 pin expander and not a 20 pin one whell hopfully it should be here tomorrow and i will modify the connector cable its a bit harsh though ...regards sparkey...thanks

What sort of input do you want?

Pins 1-10 can do either analogue or digital, and the 10 channel expander connects to the first 10 channels.

If you cascade a second 10 channel expander you get access to the second 10 channels (pins 11-20).

The expander will provide isolation for the channels, but it cant convert what is defined as one channel type on the maximite to another. I.e it cant make pins 11-20 analogue, even though it has the circuitry to support it.

Also be aware for the digital input it can allow input voltages of upto 24V to be read, but the analogue input is still limited to 3.3V, so if you want to read higher voltages than that you will need to scale it somehow.

Regards

Rohan

Rohan Hamer
HAMFIELD Software & Hardware Solutions

Makers of the Maximite Expander.

http://www.hamfield.com.au

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