New Propeller Module

Newzed

I've just finished a new module for the Propeller I made on SuperMill.· A picture is attached.

The module contains a DS1307 and an MCP3004 ADC.· It pugs into an 8-pos header - in my case Pins 0-7.· Pins 0-3·are for the 3004 and Pins 5-7 are for the 1307.· This leaves Pin 4 open but unavailable for other uses.· So........I decided to take Pin 4 high at the beginning of my program and use that pin as the pullup voltage for the 1307 SDA and SCL.· If it works - and it should - that means I won't have to patch 3.3VDC to the module.· If it doesn't, I'll cut the trace to Pin 4 and jumper an alternate 3.3VDCvtrace on the board to the SDA/SCL resistors.· ·The two holes in the upper righthand corner are for the battery, which will be installed after the unit has passed initial tests.· The little green screw terminal in the lower righthand corner is for 3.3VDC (if needed), Vss and 5VDC.

Sid



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Yesterday is history, tomorrow is a mystery, and today is a gift.

That is why they call it the present.

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Newzed

The new module works great!· The I2C scan found the DS1307 right off the bat.· Now to install the battery and it's done.· Looks like using a Prop pin set high can be used as a 3.3VDC pullup voltage.· I wouod suggest using 10K pullup resistors - this keeps the drain on the Prop pin to about .66ma.

Sid

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Yesterday is history, tomorrow is a mystery, and today is a gift.

That is why they call it the present.

Don't have VGA?
Newzed@aol.com
·

rjo_

Sid,

I was wondering if I could put an AD624 where you have the 1307?

Rich

Newzed

The AD624 is a 16-pin DIP so it would take an entirely different layout.

Sid

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Yesterday is history, tomorrow is a mystery, and today is a gift.

That is why they call it the present.

Don't have VGA?
Newzed@aol.com
·

rjo_

oops.