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devigan
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Joined: 11/08/2011
Location: Australia
Posts: 26

Posted: 08:09am 11 Aug 2011

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Hi I am a newbie just wandering how to increase the number of analog inputs on maximite Dave

sparkey

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

Posted: 09:55am 11 Aug 2011

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not possiable with out a multiplexer board to switch inputs imop

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sparkey

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Posted: 10:28am 11 Aug 2011

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then you will proly need a program to decifier the states that u r trying to collect

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seco61
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Joined: 15/06/2011
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Posts: 205

Posted: 10:29am 11 Aug 2011

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If you need more than the 10 analog inputs the Maximite provides, there are several choices available to you.

As Sparkey has mentioned you could place a multiplexor in front of one or more analog inputs to allow multiple sources to be connected to the one Maximite input.

You could use one of the many I2C enabled ADC devices that provide 1, 2, 4, 8, or more ADC channels and connect to the Maximite via I2C.

You could use multiple Maximites, and have them talking to each other over I2C (but this is probably overkill!)

Regards

Gerard (vk3cg/vk3grs)

Regards

Gerard (vk3cg/vk3grs)

sparkey

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Posted: 10:56am 11 Aug 2011

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the multiplezer and the programme would have to be completely in sync with each other regarding every pin you are trying to replicate at aguess 30 inputs read as data logging information it would be very complex and would have to be very prescice other other wise you could be reading pin errors

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sparkey

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Joined: 15/06/2011
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Posted: 11:52am 11 Aug 2011

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do you really need more than 10 analog inputs/outputs what is it your trying to do ..please explain

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devigan
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Joined: 11/08/2011
Location: Australia
Posts: 26

Posted: 04:56am 12 Aug 2011

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I need 18 analog inputs for this project

sparkey

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Posted: 05:23am 12 Aug 2011

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well you r going to definatly have to look at a decifering chip some multi i/o after the pins if you need 18 inputs then you will need to split up the 10 anolouge inputs you cold get a chip to do this ..the how`s and why`s i dont know but the programme you will need to do this will be very involved..regards sparky ... have a chat to "ceco61" this may help and ask stu for his input ,,,..regards sparkey

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seco61
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Joined: 15/06/2011
Location: Australia
Posts: 205

Posted: 06:05am 12 Aug 2011

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devigan said I need 18 analog inputs for this project

Hi.

You could use an 8 channel 10bit ADC (or 12bit for a bit extra) to do the extra conversion for you. Or you could get 3 of these chips and do all the conversion outboard of the Maximite. One sample chip is the AD7997BRUZ device from Analog Devices. It is in the TSSOP-20 package - if you can not make a custom PCB then one (or more) of the adapter PCB's could be used (eg. TSSOP-20 Adapter ).

Then you just communicate to the device(s) via I2C from the maximite.

regards

Gerard (vk3cg/vk3grs)

Regards

Gerard (vk3cg/vk3grs)

haiqu

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Joined: 30/07/2011
Location: Australia
Posts: 152

Posted: 06:27am 12 Aug 2011

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Dave,

Have you considered using the UBW32 board? It has all the pins brought out to edge connections and I it also uses the "L" version 100-pin PIC. Running MMBASIC on it shouldn't take much work.

Rob

unzip, strip, touch, finger, grep, mount, fsck, more, yes, fsck, fsck, fsck, umount, sleep

aargee
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Joined: 21/08/2008
Location: Australia
Posts: 255

Posted: 07:33am 12 Aug 2011

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It should be easy (that's relative of course). I'm running MM Basic on the UBW32 (here ) and if you look at Geoff's source code, adding the extra physical pins to the Pin command structure in the source, then re-compiling, might work.

- Rob.

For crying out loud, all I wanted to do was flash this blasted LED.

devigan
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Joined: 11/08/2011
Location: Australia
Posts: 26

Posted: 09:24am 12 Aug 2011

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Thank Guys I will take a look at UBW32. Haiqu just wandering does the UBW32 support frequency counter like the maximite? Dave

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