Differenze tra le versioni di "Arduino NANO + 19 resistors = A DDS signal generator"

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(Creata pagina con 'This is the schematics and the prototype... File:DDSnanosch.jpg It generates signals (very nice to 1300 hz, acceptable to 10khz) using a N - 2N resistor ladder DAC. It ...')
 
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Riga 6: Riga 6:
  
 
It has been designed to be plugged on 7 contiguous pins (GND, D2, ... , D7).
 
It has been designed to be plugged on 7 contiguous pins (GND, D2, ... , D7).
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[[File:DDSnano.jpg]]
 
[[File:DDSnano.jpg]]
  
Using 150ohm resistors its impedence is around 300ohm. It generates 0 to Vcc waves on an open circuit,
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Using 150ohm resistors its internal resistance of 150ohm. It generates 0 to Vcc (actually 63/64 of Vcc) waves on an open circuit,
0 to Vcc/2 on a 300 ohm Load.
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0 to Vcc/2 on a 150 ohm Load
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The source code of the Arduino's sketch is:.

Versione delle 10:06, 30 mar 2018

This is the schematics and the prototype...

DDSnanosch.jpg

It generates signals (very nice to 1300 hz, acceptable to 10khz) using a N - 2N resistor ladder DAC.

It has been designed to be plugged on 7 contiguous pins (GND, D2, ... , D7).

DDSnano.jpg

Using 150ohm resistors its internal resistance of 150ohm. It generates 0 to Vcc (actually 63/64 of Vcc) waves on an open circuit, 0 to Vcc/2 on a 150 ohm Load

The source code of the Arduino's sketch is:.