Electric Drawer

thingiverse

This is a mini project of an electric drawer. Design and build/ made by MT. Parts are designed by Solidworks and coding by Arduino. This mini-project was inspired by my friend's DIY secret drawer. His drawer has a physical internal locking mechanism, which cannot be opened easily. Then, I come up with an idea, make a secret electric drawer, which will automatically open the drawer only by pushing the hidden button. Thus, by the characteristics of the stepper motor, it can "lock" the drawer. At first, I was thinking of worm gear set up. Yet, by considering the opening speed and the chance of being user-friendly ( still can open without power). I switch the design to a rack and pinion mechanism. the rack and pinion was drawn/ designed to fit in the 3d printed stepper motor universal connector. #After the printing parts, coding, and installation. There is a few problem: The grip of the gear can be improved. Noise of stepper motor Precision (Thinking of installing some end switch). #For the default motion of electric drawer: By pushing the button 1. Open slowly ~27cm 2. delay for 3 seconds 3. Close slowly 4. wait until the button pushed (loop) ##### In this mini-project, you will need* arduino / programmer Stepper motor Stepper driver (I prefer a4988) ENd switch or push button Power (5v for Arduino and 12v for the driver) Transformer(optional) 3d printed Parts (rack and pinion) Glue/ Double-side tape for installation of rack and fix of stepper motor The code can be found in here Github: https://github.com/michaeltmlm/michaeltmlm/blob/main/Electric%20Drawer Demonstration of electric drawer: https://youtu.be/axtB6ddrHS8 This thing is still under improvement.