I suspect the world would be better if that percentage were even greater.
Nice article on making an Arduino DDS…
My experiments with generating RTTY signals yesterday made me begin to think about generating RTTY signals with an Atmel/Arduino setup. The obvious way is to use PWM and a low pass filter to approximate a sine wave. While doing a bit of research, I found the following link which seemed to be nearly ideal: it even included an amateur radio application that uses an Arduino to generate the tones necessary to transmit WSPR. It also has a very nice lowpass filter design that can be pressed into service to smooth the PWM output. Stashed for future reference:
Comments
Comment from Mark VandeWettering
Time 12/23/2011 at 11:38 pm
Yeah, it can, but it’s like killing flies with a cannon: at around $50, adding one to a build isn’t all that economical unless you are using more of its capabilities. I’m debating using PWM/DDS (the cost of which is in increased complexity and the inductors in the necessary low pass filter) versus something like the XR2206 (a dedicated frequency generator, which costs around $5 but simplifies the software considerably).
Comment from Ricardo – CT2GQV
Time 12/23/2011 at 9:53 am
Can’t the “gameduino” generate also the signals? Just thinking, have no experience with it.