project name: Based on DS1302 clock module function: Module will DS1302, completing basic circuit can connect directly by other MCU to achieve the function module; Have for electricity function, module back with button batteries, when external power is disconnected, the module can still maintain the normal operation of time. This is the electronic components before welding and blank PCB diagram ![enter image description here][1] Real figure 1 ![enter image description here][2] Real figure 2 ![enter image description here][3] Real figure 3 ![enter image description here][4] Real figure 4 ![enter image description here][5] [1]: /editor/20160415/57104409e5d08.jpg [2]: /editor/20160503/57284268d2080.JPG [3]: /editor/20160503/5728426e73065.JPG [4]: /editor/20160503/572842747ae9d.JPG [5]: /editor/20160503/5728427c7ec56.JPG