Homemade cordless rotary dremel tool/electric grinder(Adjustable speed) - diy制作12V锂电可调速手钻电磨

How to make a cordless adjustable speed rotary dremel tool at home!
How to make a cordless adjustable speed hand drill.
Hello friends, I share with you how I made a high-speed powerful hand drill electric grinder, using the 775 motor, powered by three 3400 mAh 18650 batteries, which can adjust the speed of the hand drill. In theory it can run for 3 hours, and the actual working time has yet to be verified.
In the video, I have indicated the name and circuit diagram of the material used. I will also indicate the materials and links here again. I hope to help your diy work. If you like, please pay attention to my channel to help me grow, or you There are different opinions and suggestions, and you are welcome to communicate with me in the comment area, thank you.

Materials and links
775 dc motor : https://bit.ly/2MoznTO
B10 Drill chuck: https://bit.ly/2IzLn3G
B10 Drill chuck connector : https://bit.ly/2oinBSW
on/off switch : https://bit.ly/2LkPwZZ
18650 lithium battery: https://bit.ly/31XBrbW
3S 10A lithium battery protection module : https://bit.ly/2pYM3Jp
PWM 5A Speed control module : https://bit.ly/2VsaOJN
DC5.5 socket : https://bit.ly/2OxICU5
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