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Level Shifter Shields

level shifter shield arduino due

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#1 perigalacticon

perigalacticon

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Posted 19 January 2017 - 10:42 AM

Hi,
 
Can someone please tell me the difference in function / ability of these 2 boards:
 
1.  "Voltage Translation Board for Arduino Due/pcDuino V2 and 3"
2.  "T Board to Bridge Arduino Shield to pcDuino with Level Shifter"
 
I want to use 5V Arduino shields with a 3.3V Arduino Due, which board should I use?
 
I need to know exactly what the boards do, can they:
 
1.  Convert 5V Digital Inputs to 3.3V Outputs on all pins?
2.  Convert 5V Analog Inputs to 3.3V Inputs on the Analog Input pins A0 - A5 ?
3.  Convert 3.3V Digital Outputs to 5V Outputs on all pins?
 
4.  Can the pin mode be changed at any time arbitrarily in the sketch?
 
Thanks


#2 perigalacticon

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Posted 07 February 2017 - 04:37 AM

Hello,

 

I purchased the level shifter shield for an Arduino Due and I found the analogRead function is returning incorrect values, it appears to be scaled incorrectly.  3.3V input is returning a value of ~350 counts, this should be 676 (3.3/5*1024).  Should the A/D conversion scale correctly?

 

Thanks.







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