Abstract: An intelligent payment terminal installed on a shopping cart includes a mounting seat, an mounting assembly adapted to the shopping cart, an information acquisition module for acquiring goods information, a control module for making payment for the goods in the shopping cart, and a power supply module. The mounting assembly is arranged at a lower end of the mounting seat. The information acquisition module is arranged on a side wall of the mounting seat. The control module is arranged on an upper end of the mounting seat. The power supply module is arranged on the mounting seat. The power supply module is electrically connected to the control module. The control module is electrically connected to the information acquisition module. The intelligent payment terminal can be adapted according to the size of the shopping cart and is capable of a payment function.

Abstract: Exemplary methods for making a solder joint between two articles are disclosed. The method includes the steps of positioning a first article and a second article to be soldered together. At least one of the first article and the second article has at least one button attached to it. The button has a desired height above a surface of the article to which it is attached. The second article has a quantity of solder located in a position where the solder joint is to be formed. A heat source is applied until the quantity of solder liquefies. The heat source is removed until the solder solidifies with a uniform thickness approximately equal to the height of the button.