New Quasi P.I detector coming onto the market.

[moodz]

There is a good discussion here and the background of the inventors ...

https://www.detectorprospector.com/topic/25182-algoforce-e1500/page/3/

[Gunghouk]

e1500-gold-dedecter-manual.pdf

[detectormods]

Woody, is this the detector you were talking about?

https://algoforce.com.au

I was told about that one some time ago, but this is is not the big gun one.

[detectormods]

Looks like the inventors are associated with Minelab in my humble opinion.

https://patents.justia.com/assignee/minelab-electronics-pty-limited

[detectormods]

Looks like the inventors are associated with Minelab in my humble opinion.

https://patents.justia.com/assignee/...cs-pty-limited

Looks like he was associated with Minelab and is out to cut their lunch in my opinion, I thought that they had employees sign non compete and non disclosure that basically shut them down, but that is only my opinion, there was another quasi P.i being worked on by Cheebo in China, someone I knew was going to Shenzhen so I had them drop into Cheebo, lots of info was obtained, just have to see if it comes to market as a stand alone design or if it even works on hot soils.

[ivconic]

[detectormods]

Hi Guys, I just did a tear down of the new algoforce E1500, it’s up on my YouTube detectormods chanel.

https://youtu.be/M0RPhQINWWA?si=XHfszNDSjCoqd_I6

[Carl-NC]

Woody, when you had the thing apart did you see an external ADC? Even though the STM32H7 has pretty good 16b ADCs I would expect them to use an even better external ADC.

[detectormods]

Hi Carl, I never investigated as a a super duper ADC along my lines of thinking is at least 14 bit, 80 Msps and decent heat sinking. Seems like I better take another look.

[Carl-NC]

Haha like the AD6645? That was the last pure ADC I designed for Analog Devices: 14 bit, 80 Msps, and 1.5 watts. Geez, that was 25 yrs ago.

[detectormods]

Haha like the AD6645? That was the last pure ADC I designed for Analog Devices: 14 bit, 80 Msps, and 1.5 watts. Geez, that was 25 yrs ago.

lolz Try ADS8354 , I was going to put a pic up of a string of resistors.

[Mr.Jaick]

They are using analog demodulation, I don't think they would go for a fast ADC, 4 simultaneous ADCs at 24 bits would be a better option IMO, however with a slight amplification the internal 16-bit SAR will be sufficient.

you see the preamp then three 4053s in the QFN package followed by a quad opamp as differential integrators then perhaps some filtering and off to the ADC.
pretty straightforward, I like clean designs, unlike the GPX6000 which is just overkill IMO, in like how better the GPX6000 is compared to this AlgoForce or the Axiom? I don't think much, the Axiom is also very clean with differential preamp and just direct sampling ADC.

[Carl-NC]

Thanks, when I saw all those thru-hole caps I also assumed analog demods. Even then, I would probably use a simultaneous sampling 24b ADC, like the ADS131E04 or E08.

[Mr.Jaick]

One thing about this unit catches my eye, and that's the "obscene" of any apparent shielding.
something tells me the whole plastic work is impregnated with graphite, otherwise, the capacitive coupling of the fingers on the UI would cause trouble, it's right on the preamp, The LCD cover looks suspiciously different, so much graphite made it rough.
Woody, can you meter the plastics? if you have 30sec on hand.
thank you.

[Riss]

This 2.2 microfarad capacitor implies a full ( or half ) bridge driver and this capacitor is connected in series with the transmission coil. detectormods , can you please us with a video about the current through the transmission coil ? Half-sinusoidal pulses have been used for many , many years for geophysical surveys.
Yesterday I removed some nails (I needed them for tests) from the wood ash on the stove before I threw it away. The nails stuck a little weakly (but I could be wrong) to the magnet, but the whole magnet got covered with the ash... the sticking power of the ash to the magnet (neodymium, from a computer hard drive) is the same as that of Roman floor brick dust .