190mm polisher with timer and motor speed control, TM1637 and rotary encoder. by polihedron

Last crawled date: 4 years, 5 months ago

Polisher remix for 19cm drum, flower vase.
I added simple timer with motor speed control, you can set time from 30m to 99h with step 30m, and PWM from 0% to 100% with step 5%.
You can change motor speed until counting down is active, save config: time and pwm to mcu memory.https://youtu.be/7_eBDaP_ABU
Most of the parts are resized with factor 19/17 from orginal design.
I bought drum here:https://www.ladnaglass.com/product-pol-227-Szklany-wazon-Cylinder-H-19cm-D-19cm.html
Materials from local store in Poland:https://www.korund.pl/en/
they have quite good price,
silicon carbide granulation from F12 to F220 is about 2.5 EUR, F800 is 4 EUR per 1kg.
code and schematic for timer:https://github.com/polihedron/TM1637-Timer-PWM
BOM for timer:
4-Digit LED 0.56" TM1637 display
KY-040 rotary encoder
Arduino board: uno, nano, pro micro, and probably others with enough amount of digital ports
LM1117 Low-Dropout Linear Regulator module 5V
5.5mm x 2.1mm DC Female Chassis Power Socket
IRLR024 power mosfet n-channel, or any other replacement
1N4148 diode for gear motor
6x M3 5mm screws

cap.stl and foot.stl are Fiberlogy Fiberflex 30D,
rest of elements are Rosa Transparent PET-G Premium.