Tuesday, November 10, 2015

TCL SVC 200 teardown

After some discussions on Techmoan's site  I was wondering what's inside that little cam and it seems there is more to that.
Here are some pics, note you have to desolder the remote control antenna to remove the pcb board.

Below is the wire (antenna) for the remote you have to desolder.

It seems there are some tools for ambarella video processing chips here http://dc.p-mc.eu/
There is a firmware editor here http://dc.p-mc.eu/tools/a7tool   (you have to open the A5 binary and select your SVC200 firmware file.
You can extract partitions, kernel etc. 
He has also a direct usb download software which allows firmware update gia usb cable. You can get it here http://dc.p-mc.eu/tools/directusb/download

Feel free to donate to this site, he has done a great work.

Saturday, February 28, 2015

BT521 fluke battery analyzer

Here is a quick video of me trying to test batteries with one hand.
Instrument is a Fluke BT521 battery analyzer.

Saturday, April 26, 2014

VX-8 sold

The VX-8 was sold in the states yesterday.
I only have the SDR to listen to (i only listen anyway) frequencies,
anyway i will probably get the rigol DS1074Z to help me on a thesis about AM transmitters so probably i'll post the schematics of a transmitter here.

Sunday, July 14, 2013

Vamo simulation. Real world battery test

The guys here http://www.e-cigarette-forum.com/forum/vamo/355592-vamo-battery-thread-16.html were wondering about the performance of the VAMO e-cig with 1 28650 battery or with 2 18350 stacked.
I have some Efest batteries from the last test and awsum140 measured some current consumptions for me.
So we created a "vape" simulation with both batteries, it draws the same power that the Vamo uses during vaping for 5 seconds and rests for 25 seconds. All that to simulate the actions of the user while using it. It's like chain vaping until the battery reaches the 3.3 cut off voltage. (we didn't use the 2.750V cut off since users tend to recharge the batteries at 3.3V)

The 18650 gave us 250 puffs both times. Continuous vaping for 2 hours

The stacked 18350 gave us 477 puffs (?!?) the first time and 479 the second time. Continuous vaping for 4 hours

Seems like using two stacked batteries performs a lot better.

Get the files here:
Efest 18350 525 Vape test

Note: the stacked 18350 batteries ran cooler than the 18650 mainly because the mod draws 1.02A at 7W so there was not so much stressing.

Saturday, July 6, 2013

Led drivers, Joule thief

I made a few boards of joule thief's, they can be used to light up a white led with a 1,5V battery (or even less).
Here are a few pics.

They are pretty small and can fit inside small DIY flashlights etc.

Monday, June 24, 2013

Cytac batteries

Coming soon a test on cytac batteries and their chargers, i am waiting for their new charger.

Also a teardown of the Sanyo eneloop charger.