Archive for August 8th, 2018

Baofeng UV-5 to Bike Helmet Wiring

Rather than 3D print and hand-wire a plug adapter to fit the socket around the Baofeng UV-5 mic and speaker jacks, I cheated:

Baofeng headset - harvested plug

Baofeng headset – harvested plug

Un-wearably bad Baofeng headsets now cost just over a buck apiece in lots of five, delivered halfway around the planet, and provide:

  • A compatible molded mic+speaker plug
  • A decent length of four-conductor cable with solder-meltable insulation
  • An unlistenably bad earbud on a stick
  • A lump with an electret mic and PTT switch
  • Various junk I’ll never use

The “hook earpiece” seems to have been designed by someone who had read the specs for a human head, but had never actually met a human being.

The wire colors from the dual plug, along with the wire colors for the repurposed USB cable to the headset, and the PTT connection:

Baofeng headset cable vs helmet cable - wire colors

Baofeng headset cable vs helmet cable – wire colors

Then wire it up accordingly:

Baofeng headset wire plate - first wiring

Baofeng headset wire plate – first wiring

The small heatstink tubing surrounding each connection isn’t easily visible, which, in the case of the ground / common lump, is a Good Thing. I chivied a strip of Kapton under the whole mess, folded it over on top, squished it together, then secured it with 1/4 inch tape extending over the plate edges. The cable ties stick out far enough to keep the joints from rubbing on anything; it’s not built to last for a thousand years, but should let us hear how this lashup works.

Now, to the bikes:

Baofeng headset wire plate - in use

Baofeng headset wire plate – in use

I’m convincing myself a little supporting ring under the SMA-to-UHF adapter won’t actually stabilize the precarious-looking joint.


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