2020-07-04 00:33:13

After I assembled the board with beeper, capacitor and the cables it was not working. There was no power at the welding tips. When checking the boards circuit I found this: MCU output -> drives a PNP transistor -> drives the gates of the N-ch FETs. I post a photo of the schematic: It cannot work. The diode is assembled in wrong direction (the PNP transistor will never switch on) and even if it is reversed it cannot work. The PNP transisitor is always on then because the voltage after the diode

2020-06-12 06:25:04

Recommended: Comes with Zero instructions. Note: Looks professionally made but definitely DIY needed. Needs strong soldering iron for cable soldering. Cap and buzzer not soldered and the "simple" tips have to be prepared (see pic).

2020-06-16 22:17:52

needs a few mods to make better.. pen cables changed to 10awg .sharpen tips ..direct connect to battery..better lugs on ends of cable ..solder some copper down sides of board now works better than expected with small battery

2020-07-22 22:38:13

Look good. Not test it yet.

2020-07-29 05:02:38

very fast delivery to Holland in 8 days from order to delivery recommend seller

2020-07-31 12:35:27

Stop shopping with Banggood till improves shipping service by replacing the courier.

2020-06-25 04:35:48

Worms super good

2020-08-07 09:58:06

Peça de excelente qualidade. Recomendo

2020-07-23 02:13:33

not tested yet, but looks good quality

2020-07-08 04:35:37

Great thing. for the money and little work , it is a must have.