Opening the Makro / Nokta wireless headphones

Here’s a photo report of disassembling the Makro and Nokta wireless headphones. These are compatible with the Makro Racer 1, Makro Racer 2 (with a dongle to be inserted into the control box) and Nokta Impact 1, Nokta Impact 2 machines (without a dongle). Plus, a teardown of the dongle used in the Racer detectors.

Opening the Makro / Nokta wireless headphones

Opening the Makro / Nokta wireless headphones

Opening the Makro / Nokta wireless headphones

Opening the Makro / Nokta wireless headphones

Opening the Makro / Nokta wireless headphones

Opening the Makro / Nokta wireless headphones

Opening the Makro / Nokta wireless headphones

Opening the Makro / Nokta wireless headphones

Opening the Makro / Nokta wireless headphones

Opening the Makro / Nokta wireless headphones

Opening the Makro / Nokta wireless headphones

Opening the Makro / Nokta wireless headphones

All content related to wireless headphones for metal detectors is here. All info about metal detector repairs can be found here.

7 Responses to Opening the Makro / Nokta wireless headphones

  • I’d like to know what the audio jack is for?

  • I was searching for headphones for my impact and found out were the original ones came from. Try searching for this BDS-390 Bluetooth + optical decoding all platform gaming headset. But these you can´t buy anymore. Maybe the newer Version will fit, i don´t know. But at the end it makes me a bit angry because the price of this headset is way cheaper than the ones with the MAKRO/NOKTA sign on. Did anybody try to pair some other headsets to the impact?

    (Sorry for my english)

  • I believe that those headphones are the HUHD HW-390S also available on aliexpress at half the price of nokta

    HUHD HW-390S

    NEW HUHD HW-390S 2.4Ghz Wireless Gaming Headset Stereo Sound for nintendo SWITCH PS4/3 Xbox and PC headphone Noise Cancelling

    Price: US $40.05

  • Hi Thomas,

    I did order(from AliExp) a HUHD headset before you posted here in the meanwhile I got mine and yeah it is almost the same except for the pcb layout (haven’t opened up mine, I will if it doesn’t work out of the box chances are 50/50) probably just another ISM frequency, and channel is used probably seeing the module in the original post it seems that they have used a rather cheaper version of the CC2590 which has a TI IC instead of a nRF24 for 2.4ghz ISM. I wonder what the differences are on RF level, we probably have to take a look at it with a SDR and hack it a bit to make it work. I will test my headset with a friends his detector. I really wonder if it works out of the box, I doubt it to be honest.

    All Nokta did is they designed their “own” pcb layout (an improved version of the HUHD-390S I guess) different firmware and RF IC, preamp and the ABS molding in order to hide the gaming headset it’s now useless buttons. Why they left the microphone is a really mystery, probably production cost reduction.

    As you can see the SPI rom(?) next to the cpu(?) is a SOIC8 SOP8 joby. I could dump the firmware, make changes are write back to test if it works. But first need to know whats up in the Nokta transmitting end, here is were we need the SDR. We don’t want to break the waterproofing of the Nokta so we have to do it this way. I don’t see another way tbh..

    Unfortunately I cannot find the Simplex+ on fcc, it might still be too new?

    Anyways IMPACT uses a nRF24 SMD board (off-the-shelf part), so my bet is that the Simplex+ also does. Why would they reinvent the wheel, maybe the code is also open source already (Github).

    If we want to reverse engineer it we have to find the channel, baud-rate and base address after that we can should be able to make it work? Just need a SDR and some free time. But yeah I was a smooth brain, I admit why did I order this again.. Let’s say a fun project.

    Greetings from The Netherlands.

  • Hi 58,
    I ordered the headphones two weeks ago from aliexpress and I’m waiting for delivery in Italy. Most likely they will arrive first to you since almost all the shipments of Aliexpress make first stopover in Holland (Holland is my favorite country, I come many times :))

    As soon as they arrive I will run tests with my nokta simplex + and see if they can mate without problems even if I doubt.

    It would be interesting to do the tests you suggested.

    Greetings

  • waiting to hear how this goes.

    I would like headphones; but dont want to pay the nokta price tag!

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