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<font face="Comic Sans MS">I tried to solder the broken traces, but
just couldn't do it. I've ordered a new main board. </font>I
almost burned my nose trying to solder using a jewelers loup. At
10x it focused at about an inch. I always ask doctors if they are
getting rid of any of their old optics like they use in surgery,
that stuff is expensive. I might be able to salvage this board,
I've a plan for using a ribbon cable, but for a while this critter
will sit on a shelf as I have two other builds on the table. <br>
<br>
I did look up the chips. The RF chip was buried in a black goo, but
I found a reference to it in a RC forum. It's a nRF24L1 which is a
transceiver on 2.4 GHZ. Very low power. In the picture it's on the
RF deck. Under the ROHS sticker is the main processor a STM8S00, 16
bit and IIRC can communicate at 2 MHz. It has on board memory. In
the overall picture the chip to the left of the main processor is an
Invensense MPV-3050c which is the 3 axis gyroscope. It is used in
cell phones so it is fairly cheap and available. <br>
<br>
I wonder if the labeled pins on the RF deck are recognizable to some
folks right off. Vdd and GND I got. MISO, MOSI, SCK, CSN and CE
even looking at the data sheet were strange to me. Are these common
to all processors?<br>
<br>
Alex Fraser wrote on 6/5/2015 4:08 PM:
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<font face="Comic Sans MS"> I have to replace two motor
assemblies on my Syma X6 quad copter. That is a simple straight
forward solder job. I thought while I had the board off the
frame I might modify the antenna for more range. In the first
picture you can see the layout. The board is 1.82" square</font>.
There was a small board I call the "RF deck" which laid flat on
the main board. I suppose that is so they can put whatever radio
they want on the main board. I pulled the RF deck upright to trace
the ground so I could find a pad to solder on the coax shield for
the antenna, They had attached the RF deck to the main board in
the board construction, in an oven I guess, so three connections
on the bottom were soldered to traces under the board. The traces
of course broke when I pulled on the board. When I fix it I'll
leave it upright and just hope it don't cause an RF problem, pick
up noise or vibration etc.<br>
<br>
<img alt="" src="cid:part1.06060009.03030302@comcast.net"
width="800" height="600"><br>
<br>
I circled the injured traces. It is at 2.4 GHz. I have no idea
what "RHOS" is but the label peeled off and I'm going to search
for that chip just for fun.,<br>
<br>
<img alt="" src="cid:part2.06090200.05000301@comcast.net"
width="800" height="600"><br>
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<pre class="moz-signature" cols="72">--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
No electrons were harmed in the creation of this message
--------------------------------------------------------
~~~******************* Alex Fraser *******************~~~
--------------------------------------------------------
[[[[[[~~^^^#___=>>>```/\/\**O**/\/\```<<<=___#^^^~~]]]]]]
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