holo clock

prusaprinters

<p>update 2(2016/11/25) added printable spacers and a motor mount plate for 20mm npm motor</p> <p>update 1(2015/2/6) : added assembly sequence sheet .</p> <p>this is a simple clock based on a single geared stepper motor which i found in surplus 10 for a dollar... The motor is basically a 1:30 geared motor working at 12v with a 3mm shaft. The single motor is driven by a attiny2313 and l293dd circuit with the coded written in arduino ide. The single motor moves a gear train which in turn moves the minute ring and hour ring. The attiny pulses the motor every minute to move the minute wheel and the hour wheel.</p> <p>buy at:</p> <p><a href="https://www.tindie.com/products/ekaggrat/holo-clock-2/">https://www.tindie.com/products/ekaggrat/holo-clock-2/</a></p> <p> <figure class="media"> <oembed url="https://www.youtube.com/watch?v=1EtiEFQ4Aqg"></oembed> </figure> </p> <h3>Instructions</h3> <p>print all the parts at minimum 0.2mm layer height</p> <p>bolts : m3 x 45mm 4</p> <p>m3 x 25 mm 2</p> <p>m3 x 22 mm 1</p> <p>m3 x 10 grub screw for motor gear</p> <p>m3 nut x 7</p> <p>for npm motor (optional)</p> <p>m2 x 10 2</p> <p>m2 nuts 2</p> <p>for bj25 / bj20 motor</p> <p>m3 x 15 self tapping screws 2</p> <p>pcb spacers / cut from any brass/copper tubing ( printable option also )</p> <p>4.5 outer dia x 3.5 mm inner dia x 12.mm length 2 pieces</p> <p>4.5 outer dia x 3.5 mm inner dia x 8.5.mm length 4 pieces</p> <p>4.5 outer dia x 3.5 mm inner dia x 6.5.mm length 2 pieces</p> <p>for the stepper you can use any 20mm or 25mm diameter geared more than 1:10 ratio, bipolar or unipolar.</p> Category: Decor