Liquid mixer-E cigarette, painting color

myminifactory

I wanted to have a versatile e-liquid mixer for my mods. I take a lot of juice per week, so usually I mixed them in 100ml bottles. Unfortunately, aging takes too long a time. There are two options to speed it up: heating it to high temperature or mixing. I did not find any usable mixer here, so I created my own. I didn't want one with a servo motor, as they are very loud - lots of Chinese gears. My wife uses textile paints and before using them, you have to mix thoroughly, so she only puts the bottle into a holder, fixes it by a velcro strap and connects power. Just adjust speed and let it mix for a few minutes. I used an Arduino Pro Mini clone from Ali (less than 2 euros), an A4988 stepper driver, a 4k7 potentiometer and a 12V power supply. I will not post connections here, as everybody can find how to connect them and the stepper potentiometer sketch on The Internet. Here is a very good example of code and drawing: https://www.makerguides.com/a4988-stepper-motor-driver-arduino-tutorial/ I didn't want it complicated, so just a few screws are needed. Two M4 nuts and screws for the bottle stopper block, four M3x12 screws and washers for motor fixing, two M3x8 for securing the bottle holder on the motor axle (not really needed as it is a tight fit), some 2.5x10 wood screws for attaching velcro holders and bottom cover, four 2.5x25 wood screws to avoid misalignment of TPU stopper (avoid rotation). One Arduino Pro Mini or nano, one A4988 driver (if possible, replace it by TMC2208 for quiet operation), one 4k7 potentiometer with knob, one DC barrel jack for panel mount (depends on your power supply), one 12V power supply (500mA is enough), and one NEMA 17 stepper motor (I used the smallest I had at home - Microcon SX17-1003LQCEF). Installation is straightforward, so after testing the motor functionality, assembly can be done within 20 minutes. I also created some logos to be superglued to the case after assembly, so it looks better... SMOK, Tesla Cigs, Eleaf, Wismec. Fits bottles from 10 to 100ml (stoppers are adjustable). Printed from ABS, holes for motor axle tapered by M3.