Never call QTableView::scrolltoBottom from slots connected to the model's rowsInserted signal because as the rows added they will start to appear partially:



Connect your slots to the QTableView::verticalScrollBar's rangeChanged signal

Got a broken Dewalt DCG414 angle grinder to look for the issue.

It has a 54V BLDC motor with builtin ESC mfr P/N: N599252.
The only option is to buy the ESC with the motor and the trigger circuit for ~180 GBP...

I removed the ESC from the motor. The ESC is potted with some PUR resin, so I started to carefully remove it.

It turned out that the low side MOSFETs were blown.

The Hungarian Shell pleased us again with a Bluetooth toy car promotion, this time with Ferrari models branded as Bburago.

I have a Nissan Formula-e car (made by Brandbase) from the previous campaign, and I was curious to see the differences.

Fortunately my colleague SJ already scored one and allowed me to take it apart.

The construction is a bit different: the battery/electronics unit is built-in unlike the Brandbase one:


The steering is similar (dc motor without end limits):


Main PCB marking: KCE210119


Smart, module based design.
BLE MCU marked with YC1063 UG6860. Possibly YiChip YC1063 Many thanks to David for the tip!
Two (supposedly H bridge) SOT-23-2 marked with SA1016 (U2 and U6).
Lipo charger marked with B137 70pJ.


Battery has 100 mAh printed on it and it is supposed to be a Huahui HFC1025 LiFePo4? single cell.

Just in case if you are interested in the protocol of the XN297LBW on the board here is an SPI trace in Saleae Logic 1.x format:
http://balubati.atw.hu/website_files/we ... .logicdata

Just in case if you wanna drive your kid's car with deviation based RC TX or whatever

Recently bought from Aldi for ~4K HUF just a few internal images.