Question for Dave J.

[Randy Seden]

Do you know if any detectors use an 8051 and if not why? Just curious as I'm planning on using the Aduc 812? in a metal detector design.

By the way, I met Jim Straight out at Randsburg at the General Store this afternoon and as we talked about the different metal detectors he had many a good thing to say about you. Neat guy and we went down the hill a bit and he taught me alot of his tricks to metal detecting (kinda nice getting it from a pro for once).

Randy Seden

[Carl]

Re: Question for Dave J.

If I'm not mistaken, the XLT and DFX use 8051-based Motorola microcontrollers.

I saw we've (ADI) just released some new ADUC parts. I think they have higher resolution (albeit slower) ADC's and more on-chip memory. I hear there is a new 812 coming out with more memory, maybe other ADUCs as well as this strategy has a lot of support now.

- Carl



ADI Microcontrollers

[Randy Seden]

Re: Question for Dave J.

Hey, just what the doctor ordered. Thanks Carl!

Randy Seden

[Dave J.]

Re: Question for Dave J.

Randy, I know that Motorola HC05's are being used by at least two companies, and HC11's by at least one. Not aware of any 8051's but it's a popular chip so it wouldn't surprise me. So far I've done all my stuff with PICs.

Jim Straight is one heckuva likeable chap. Glad you had the opportunity to meet him.

--Dave J.

[Robert Hoolko]

Re: Question for Dave J.

Randy

I have looked at using the ADuC812 for a metal detector. There is a project I want to try it on using the analog outputs for ground canceling. The problem is that it is a slow processor. My other project uses about 25% of the throughput of the 8 MHz AVR (and I am not done yet). I am executing about 2 million instructions per second. The ADuC812 has an 11 MHz clock but it requires 12 clocks per instruction so it executes less than 1 million instruction per second.

That means that I cannot transfer parts of my existing software design to the 812. I have to start over from scratch and design for a slower processor.

But for a conventional design that demodulates, filters, and ground balances in hardware and only has to process low frequency signals, the 812 should be fast enough.

Robert