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How to make a mini drill from a used toy car dynamo. The mini drill we'll be making this time only uses a 3.7-volt power source from a rechargeable battery. This method of making a mini drill from a dynamo is different from the one we made last time. This time, we're making a good, inexpensive, yet high-quality mini drill... Materials: 1 3/4-inch T-tube connector 1 1/2-inch pipe connector 1 1/2-inch pipe, 7 cm long 1 3/4-inch pipe, 3 cm long 1 3.7-volt DC dynamo (upgraded) 1 3.7-volt lithium battery 1 push-on switch 1 mini drill bit (homemade) So, those are some of the materials we'll need. For more details, please watch the video until the end...!!! We hope this video is useful and inspiring. Thank you for watching, don't forget to SHARE, LIKE, COMMENT, and SUBSCRIBE 🙏 Tags: #oldtechnician #electric drill #minidrill #drillhead #portableminidrill