This didn't go quite to plan. The screw that holds the chuck onto the output shaft seems to have major threadlock on it, so I didn't get to explore the final clutch stage internally

But it's revealed the PCB module that we're all interested in anyway. I'll leave the proper mechanical teardowns to my Canadian YouTubebro AvE the toolteardown master.

First thoughts on the 20V version of the electronics are that the base module only switches off power to the variable speed trigger when it detects a battery with low charge or overheating. Its power supply deserves further investigation, as the module is always powered when the battery is connected, so my thought that it might use a simple resistive dropper isn't an efficient way of doing that.

The thermistor input that enables the tool seems to operate between a resistance of 2K and 68K. The thermistor can be switched off by the battery, so it may be using that to stop the tool when the battery is low.


If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at: http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's algorithm quirks, allowing it to be a bit more dangerous and naughty.


#ElectronicsCreators