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This didn't go to plan.  The chuck screw seems to have major threadlock on it and wasn't budging in either direction.

I did manage to get the electronics out though, so I can look at reverse engineering one of the 20V control PCBs now.

https://www.youtube.com/watch?v=KJi2DeEDD5g

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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 YouTube-bro AvE the tool-teardown 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. Mid-play video-adverts are annoying in technical videos, so I don't enable them. If you appreciate that and enjoy my content then you can help support the channel with a contribution of a dollar or two a month on Patreon. That also lets you critique the (advert free) videos before they are released, gives a more direct means of communication with me and also gives access to the regular relaxed Patreon live streams. https://www.patreon.com/bigclive #ElectronicsCreators

Comments

Curtis Hoffmann

If things went according to plan, there'd be no need for the internet...

Mike Hughes

AvE's secret to success is, he always uses the self healing mat on the healing bench ! (lol)