digital "pots" have been around for quite a while...

[Robert E. Seastrom]

I was disappointed they only go up to 5.5pF.  Nowhere near enough to
build myself an Arduino-driven crystal set.

-r

Mike O'Dell <mo at ccr.org> writes:

> I see - "Sparkgap Defined Radio"
>
>     -mo
>
>
> On 3/19/12 10:55 PM, Joseph Bento wrote:
>> Now if they can make them with the equivalent of 3,000 volt spacing on the plates...
>>
>> Joe, N6DGY
>>
>> On Mar 19, 2012, at 8:53 PM, Mike O'Dell wrote:
>>
>>> this was, i guess, inevitable?  digitally adjustable capacitors
>>>
>>>
>>> http://www.psemi.com/content/products/apps/product_dtc.html
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