$5 bubble gun sold on the street corners comes with two bottles of bubble solution and three AA batteries (inside the gun). Only thing you need to do is to open the bubble solution cap and twist on the gun. Two blue LED lights will light up and the pooch will blow bubbles out his mouth when you full the trigger.
I used a eye glass screw driver and a precision screw driver to remove screws, and a surgical forceps to somehow hold one part and remove other parts near the motor. And of course paper towel. I thought the inside design will be water proof, but the bubble solution was leaking everywhere and making some parts of the wire were rusted. (Cheap toys!)
As soon as I unscrewed the bottom cover, the batteries just popped out and revealed the cords inside. The red one is connecting the batteries to the motor, the yellow one is connecting the batteries to the trigger and then to the motor and the blue one is attached to a resistor to the LED light and then circle back to the motor through the red cable.
I found the pink funnel with a small metal attached to the end pretty clever. It catches the extra solution dripped from the frame and channels the solution back to the bottle, and that keeps the motor and other parts from the liquid.
The motor is a CHAOLI brand (a chinese motor manufacture company based in Guangdong), and it has a 104 resister (should be 100kΩ) attached to it. The welding wasn’t nicely done, so the wires were all half broken and rusted.
The whole system was simple yet quite complicated… the rubber hose has to suck up the bubble solution from the bottle to the frame, and a piece of blue plastic has to go up and down to make sure there is always a layer of solution on the frame. And then the pink plastic fan attached to the bottom of the motor has to rotate to blow the bubble out. Most of the parts are plastic most likely through the injection molding.
Some parts were very loosely attached that when I removed a piece off, other pieces fell a part all together… But I found the color coding different plastic and wire parts useful, especially in assembly. There is no need to make the inside parts different color, but the designer clearly made the decision to do it for people who assemble them. Also, there was almost no glue involved in assemble the gun. Everything comes a part and designed to fit back together, so it was easy to separate the plastic and metal.
I just felt like I need to share this part with everyone. The battery cover is “Made in PRC” (meaning made in People’s Republic of China), on the cover, it says “Make In Shantou, China” and on the bottle, it says “MADE IN CHINA.” Which tells me that they probably came from different factories in China. The funny thing is… “Make in Shantou, China” supposed to be “Made in Shantou, China”… and “THIS NO FOR DRINKING” on the bottle is grammatically wrong yet gets the meaning across.