On 25/06/2012 12:29 PM, peter green wrote:
> David Duffy (AVD) wrote:
>> I'd like to make a programmable (serial control) oscillator as part of a
>> test rig.
>>
>> All I need is square wave output (adjustable symmetry would be nice but
>> not essential) and a frequency range of 0.1Hz to 20Khz or so. The area
>> of interest right right now is more like 0Hz to 200Hz for simulating a
>> pulse counting input to the device under test.
>>
>> I'm using a $100 function generator for now, but the display resolution
>> of 1Hz is somewhat limiting.  PC control would also enable me to
>> automate some of the testing.
>> David..
> What step size and accuracy do you need?
>
> Can timer2 in a pic18 do what you need?

I had thought of a PIC as the source,  but wasn't sure how I'd go at=20
higher frequencies.  At this stage I'd rather a dedicated chip design.
David...

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___________________________________________
David Duffy        Audio Visual Devices P/L
Unit 8, 10 Hook St, Capalaba 4157 Australia
Ph: +61 7 38235717      Fax: +61 7 38234717
Our Web Site: www.audiovisualdevices.com.au
___________________________________________

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