Arduino NANO + 19 resistors = A DDS signal generator
Versione del 30 mar 2018 alle 10:06 di Renzo (discussione | contributi)
This is the schematics and the prototype...
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).
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:.