It took me a while to find a proper replacement motor (identical to the original) for a front brush of a Sencor SRV4250 hoover. Motor gearbox nr. BL500-T2

No load current consumption at 12V: 15 mA
No load current consumption installed into the greased gearbox 12V: 25 mA
Stall current: 190 mA @ 12V

Outer diameter: 32 mm
Shell length: 18 mm
Shaft diameter: 2 mm
Shaft length: 9,5 mm

If you need one in Hungary drop me a message I have some for sale.

I bought one and opened up, to save you from doing that :D.

tldr: no H bridge, no frequency modulation, just the oldschool phase dimming circuit with a Triac.

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.