Comments on: AVR DDS signal generator V1.0

By: Valantis

Valantis — Sat, 16 Apr 2011 08:25:14 +0000

I made this signal generator using the exact parts (metal film resistor, crystal, capacitors) and the first firmware but i have a problem. the output frequency is not correct (on lcd displace 65535 and the output frequency is 4210.

By: Henry

Henry — Mon, 26 Apr 2010 23:13:04 +0000

Can you post configuration of fuse bits in Pony Prog? Please

By: AVR DDS ?????

AVR DDS ????? — Tue, 10 Nov 2009 11:07:24 +0000

[...] ?????http://www.scienceprog.com/avr-dds-signal-generator-v10/ This entry was posted in ????? and tagged AVR, ?????. Bookmark the permalink. Post a comment or leave a trackback: Trackback URL. « ??GPS???? [...]

By: scienceprog

scienceprog — Wed, 29 Oct 2008 14:02:20 +0000

Everything is correct. Resolution of 0.1059638129340278Hz means smallest step frequency can be incremented or decremented. Look more carefully at formula – you can see that F_CPU is divided by ‘clocks for one sample output’ – what means more clocks per sample the lower resolution.
Don’t forget to check out second version of AVR DDS generator: http://www.scienceprog.com/avr-dds-signal-generator-v20/

By: Burkhard

Burkhard — Wed, 29 Oct 2008 08:08:11 +0000

Hi,
thank you very much for publishing your AVR DDS Application. It is exactly what I searched for. The Documentation is very good and there is no question open except one:
fres=(F_CPU/(clocks for one sample output))/2^(accumulator length) = 16000000/9/2^24=0.1059638129340278Hz.
That means, the more clocks for one sample output you need the better is the resolution?
I think the correct resolution is 1/0.1059638129340278 = 9,437184 Hz.

By: Victor

Victor — Tue, 02 Sep 2008 19:47:54 +0000

Hey I waited for a response of you people and I have nothing, truly I’m disappointed because you are giving bad data and files of this signal generator, actually the hex file you give is not for an atmega8 and second it doesn’t work, so please, upload a new working hex file for a real atmega8, not for a simulation program

By: Victor

Victor — Mon, 01 Sep 2008 13:13:14 +0000

Hello and nice work with your signal generator, I’m a fan of the AVR micros and actually I’m building your design on my breadboard for further test, but i have a problem trying to load the hex file in the atmega8, I have a program called bootloader installed in the flash memory that helps me to load any program trough serial to serial comm, but it says that the hex file is too large to load, actually the hex file you have is kind of big

By: signal generator uses

signal generator uses — Sat, 26 Apr 2008 20:43:28 +0000

[...] to analog DAC converter This is a simplest solution where resistors are connected in a ladder: …http://www.scienceprog.com/avr-dds-signal-generator-v10/signal generatorsThis is one of the best analog signal generators ever made easy to use very [...]

By: The Vacar Perimeter » Sending mixed signals

The Vacar Perimeter » Sending mixed signals — Sun, 30 Mar 2008 04:40:48 +0000

[...] to you attention the AVR DDS signal 2.0. Scienceprog.com has an article on it which links to the AVR DDS V1.0 generator as [...]

By: AVR DDS signal generator V2.0 - Scientific, embedded, biomedical, electronics contents.

Mon, 10 Mar 2008 13:42:51 +0000

[...] second and improved AVR DDS signal generator is here. First AVR DDS V1.0 generator was only an attempt of running DDS algorithm without any amplitude control. This time I [...]