Hi the inhabitants of our site! Today I want to talk about my author's home-made: Automatic machine for the sale of drinks do it yourself. We start by making a case for our machine. I made a case of ten millimeter plywood. Next, you need to think about the capacity for the drink. I bought it at a hardware store. Now mount electronics. 5 volt pump, wires, battery holder. I collected a timer board from an electronic designer.
(If you do not have one, then you can buy a ready-made timer board). We connect all the components together and connect the tube (you can from the dropper) and install the other end into the fill window. Then the most complicated process begins. Need to make a coin acceptor. Of course, you can fork out for the Chinese, and buy a ready-made one, but we have a DIY! Therefore, all its claws. We need to make holes for coins in cardboard or tin (what you have) and attach it to our case.
All is ready! You can see a more detailed description of the operation of the machine in the video:
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