Rotating LED Display Alarm Electronic Clock DIY Kit Case Shell Light Control Temperature DS1302 C8051 MCU Module STC15W408AS

[Note related to LED class suite]
Between some customers said the light is not on a lot of after
welding, the combination of market feedback and our own welding
dozens of sets of testing, sampling and LED lights will have a large
number of tests, the lamp itself has a problem of possibility is very
small. Welding technical proficiency and the cause of the soldering
iron burnt and soldering iron electrostatic damage problem is
widespread, not letter you can use a multimeter or before welding
CR2032 button battery - a test. Welding technology is not good, or
welding less at ordinary times, suggest you can also buy more lights.
Set aside.
Test LED lights don't can directly use dry cell test 2 day, regulated
power supply must not be directly used to test, have no direct use
of mobile phone batteries, or, a rechargeable battery to test the
above tests must add resistance to current limit, or you don't have a
second will burn out leds! For a testing tool is CR2032 buttons
"battery", can buy one to test in our store.
Please note: suite without the power cord, need to buy in our store,
thank you!