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Topic: Supply for handmade arduino (Read 1 time) previous topic - next topic

Docedison

2 things quickly 5.0 VDC for a 7805 is 'nominal' it can and will vary +/- 5% so the output can vary +/- .25 V and be in spec. There are 'grades', none A, B, C, that denote various output voltage tolerances. If you need 5.0V foa an A/D measurement then correct it by multiplying the A/D result by the actual Vcc divided by 5 '5/4.9 =' .02 or the A/D measurements are 2% low when the Vcc is 4.9V
Second, @ MarkT How is the internal AVref calibrated/changed..? I would like it to be 1.024V for obvious reasons.

Bob
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"The solution of every problem is another problem." -Johann Wolfgang von Goethe
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CrossRoads

Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.


vasquo

What-in-the-hell kind of program made this schematic?
It's freaking ugly.

CrossRoads

Don't know - my guess would be fritzing.
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

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