northwest Convert your Metal Detector to Bluetooth
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australian electronic gold prospecting forum.com  |  DIY forum  |  DIY forum  |  Topic: Convert your Metal Detector to Bluetooth 0 Members and 1 Guest are viewing this topic. « previous next »
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Doug
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« on: Sunday November 30 2014 11:34:16 AEDT AM »

Convert your Metal Detector to Bluetooth
" Epilogue: The author field-tested two Bluetooth transmitters with his detector and found that neither was able to locate a target correctly."
  
doug smile
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All posts on this forum are the personal views of the author and should  not necessarily be  interpreted as those of Admin The QED contains NO patented or protected IP!!! No fake users on this site! This forum does not depend on  guest posting liars to survive!1/2 wit powerless to login and post! LO
6666
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« Reply #1 on: Thursday December 11 2014 10:51:29 AEDT AM »

FM is the way to go, but dont over drive the TX.
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geof_junk
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« Reply #2 on: Thursday December 11 2014 12:44:13 AEDT PM »

Quote on BlueTooth
" The problem is that the transmitter has too much "latency" or delay in transmitting to the headphones. This places the target in the wrong location on the ground and in some cases, creates multiple false locations."

6666 what brands (FM) would you recommend to try and how do they compare to Bluetooth

Regards Geof.
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6666
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« Reply #3 on: Thursday December 11 2014 16:47:49 AEDT PM »

I did a lot of work on the FM tx and rx compatibility of types and brands but never published it anywhere in full, there are very good TX' s with digital readout available on flea bay, I tried different analogue FM rx's , they all worked with no LAG.

I was testing them with my ACE 250 which has no headphone volume control , and over drove the TX, so I tried an inline volume control  and that fixed the over drive problem.

The TX's charge up from the USB port of your PC and last a fair time, they are so cheap just buy a couple and when the battery goes flat, just plug in the spare, and the right one's keep their tuning when turned off.

I tried a lot of different FM rx's , a couple of cheapy's  from reject shop and some off fleabay, the one I wanted to try I never bought, but it had a digital frequency display, what I found with most cheap FM rx's is that when you turn them off they loose their tuning, so that requires a retune when next you turn it on, but they all worked, and was a very cheap option for hands free.
This transmitter cost a whole $8.95 posted from Sydney, and the inline volume control was $1.50 posted from china.

Just plug in the TX via any adapter to the head phone socket.
Take notice that you need the TX with a 3.5mm jack plug that has only the three connections on the plug, tip, ring and sleeve, you dont want the one with two rings.

The reject shop, may still have  a small scanning FM receiver with ear buds for a whole $5.00, they are  ideal to pop into your shirt pocket and away you go, and they remember the last frequency tuned.

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geof_junk
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« Reply #4 on: Saturday December 13 2014 19:43:22 AEDT PM »

Thanks for that 6666     happy face
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