Cracking Open The Motorola HS820 Bluetooth Headset

Step 6: Test to Make Sure Headset Still Functions

I atttemped to make a call with the disassembled unit and it still functions. Woo hoo it does. Notice the placement of the led. this could come in handy when you re-appropriate the headset for one of your projects.

Comments

[mtdna]

How do you rewire the On/Off/Call switch for easy hacking? For example, how do you wire it to a separate push button?

It just looks like a little pad - do you tear it off?

Thanks!

[beehard44]

you desolder the switch and solder wires to the 2 pads

[Thaikarl]

i opened an much earlier model of one of these motorala jobs. there were these two tiny tiny bits, along the edge of the seam on each side that flew away. i examined the thing carefully, and decided that those were "anti-hacking" bits. if you took the thing apart - i was trying to see if the battery could be replaced - the little bits would fly off, and when you put it back together, it wouldn't work

[stankdog]

would it be possible to hook this up to a regular speaker (6x9) say for a garage application. I hate the ear phone but would love to answer the phone. Let me know as I have several types of speakers left over from a wall of sound project! Thanks,

[airwalker20]

hey, just found this headset and tried to charge it, but the led doesnt light up, and i opened it but couldnt find anything( in my unexisting experience ) wrong, ill try to charge it tonight and see if maybe the leds wrong, any suggestions on how to check if its still worth anything? by the way, great job

[Boss_Sauce]

Excellent tear-down! I put a Jabra into an old AT&T handset (see the flickr set) but destroyed a second headset-- a Motorola-- trying to solder leads to its circuit board...:( Those components are tiny!

I just w00t!'d two Jabra BT350's (and ordered tiny conical solder tips too...;) and will do an Instructable on tearing it down _and_ soldering leads to a separate board to make it easier to hack onto/into other devices.

[irritant#9]

At least you are done with that flathead screw driver.

[remarc solo]

Ylim is right if you are trying to send a lot of data. However to transcieve at say 1200 baud attach either a modem, or implement one using a function in a $5 dsp or microcontroller. (Should use about 10% of the CPU). If a hundred people want it I'll show you how and get the kit.

[ylim]

Interfacing bluetooth is seriously tedious, perhaps because of the tight requirement of synchronizing the hopping sequence. It is pretty amazing how the bluetooth is selling that much. The point that I am driving is without a proper datasheet, I guess this module is nothing much of a value in serious work.