Small pin-count device for generating output frequencies when triggered

[HenrikOlsson]

If you need to be able to change the tone "continously" then rearanging the code slighty might make it a little bit better, the glitch should be in the us* range:

Main: 
   GO_DONE = 1		    ' Start the conversion
   IF Trigger THEN       
      Sound SPK,[Tone / 4 + 50, 1] 
   ENDIF
   WHILE GO_DONE : WEND	' If trigger isn't 'on' we need to wait for the ADC.
   Tone = ADRES
Goto Main

*Depending on how much time SOUND needs to "set it self up".

/Henrik.

[Dave]

Hey Jim, If all you are looking for is an A/D to Oscillator output have a look at maybe using some Linear Tech. TIMER BLOX. They make 2 different VCO's to cover the range from 29uHZ to 977 HZ and 1 for 488HZ to 2Mhz. They are in 6 pin SOT packages. Just a thought.....

[JimAvanti]

Hi Dave,

I just looked at the datasheet for the LTC6990 and it does look like it could work for what I need. I would have to test how the frequency ranges sound first, but it seems to have everything I need (OE to trigger it and Freq can be controlled by a POT manually). I'll have to test it and let you know.

Thanks,
Jim

Hey Jim, If all you are looking for is an A/D to Oscillator output have a look at maybe using some Linear Tech. TIMER BLOX. They make 2 different VCO's to cover the range from 29uHZ to 977 HZ and 1 for 488HZ to 2Mhz. They are in 6 pin SOT packages. Just a thought.....