Arduino function gen

[House91320]

I am working on a arduino function gen and I am hitting a wall. The ardduino isn't fast enough to generate the desired hrz is anyone aware of a frequency multiplier.

[PeterG]

An Arduino by itself wont be able to do it, however you can use an Arduino to control a Waveform Generator IC such as a MAX038 or a ICL8038.

Regards

[bilko]

You could add a DDS module like http://cgi.ebay.co.uk/AD9850-DDS-signal-generator-module-circuit-diagram-/170572409806?pt=BI_Signal_Sources&hash=item27b6e86bce

[scrat]

It depends on the frequency range you need and the waveform (square, sine, ...).
In the case you need an accurate frequency into a limited and enough high range, you can use a PLL (e.g. 74HCT4096 / 9046) together with the PWM peripheral of the Arduino and a divider, in order to "multiply" the output frequency.

[buffalo960]

I am working on a arduino function gen and I am hitting a wall. The ardduino isn't fast enough to generate the desired hrz is anyone aware of a frequency multiplier.

You should mention that you are using a digital Pot to do it.

[House91320]

My mistake.

[Alex]

Pfff...there is a plug-n-play board for anything these days.

As mentioned, with the power of the arduino the best thing you can do is to use an external DDS chip (even for low frequencies) so you can use the arduino to implement a user interface to the DDS chip.