Upgrade DIY EC1515A DS1302 Rotation LED Electronic Clock Kit 51 SCM Learning Board<br>SKU176893 Upgrade version: Date， time， temperature by turns display. Alarm clock function， the whole point timekeeping function. Pioneered music alarm， There are seven options for the Chime ringtone and Alarm clock Alarm. A variety of colors LED optional<br><br>Instruction: Click Here!!!!!!!!!!!!!!!!!!!!<br>There are 7 Kinds of LED:<br>1. Blue digital tube + Orange &amp;amp; Green LED 2. Red digital tube + Orange &amp;amp; Green LED3. Blue digital tube + Orange &amp;amp; Blue LED 4. Red digital tube + Orange &amp;amp; Blue LED5. Blue digital tube + Red &amp;amp; Blue LED 6. Red digital tube + Red &amp;amp; Blue LED7. Blue digital tube + Red &amp;amp; Green LED8. Red digital tube + Red &amp;amp; Green LED<br>Description:<br>Size: 81 mm x 81 mm x 1.6 mmPCB thickness: 1.6 mmMaterials: FR4 military levelOperating voltage: DC5V<br>Function: <br>Alarm clock: You can set the alarm for the length of time， and the musicThe whole point timekeeping: You can set the whole point of timekeeping， and the music<br>There are 7 kinds of music you can set:<br>A. &amp;quot;D&amp;quot;&amp;quot;D&amp;quot;&amp;quot;D&amp;quot;&amp;quot;D&amp;quot; ( Default alarm tone ) B. Broadcast timekeeping ( The whole point timekeeping default ringtone )C. Jasmine ( Chinese music )D. For Elise E. CanonF. Give a little Time to Your Love ( Richard Clayderman)G. BBK  ( Chinese music )<br>Welding note:<br>1， P1 for the development of the interface， not welding.2， component identification:Components with no positive or negative polarity: Resistance (R1~R15) ， Thermistor(RT1)， Ceramic capacitors( C4 ， C5 )， Monolithic capacitor (C2 ， C3 )， Crystal oscillator (Y1) ， Keys (S1， S2).Distinguishing positive and negative elements:LED(D1~D60)，Battery seat(BT1)，Electrolytic capacitor(C1)，Buzzer(LS1)，These elements should be noted that the positive and negative poles of the circuit board are to be noted.Other multi pin element:STC15W408AS ( U1)， DS1302( U2)， S8550( Q1 )， Block USB (USB1)， These elements should be noted in the same direction as the circuit board.3，Positive welding LED， digital tube， Thermistor， and other components of the welding in the back.4，LED has two colors， the less number of color welding in a large number of corresponding position， and the rest of the location of a number of more than one color.5，U2， C4， C5， Y1， BT1 must be welded before the digital tube， pay attention to the points on the digital tube.6，The working voltage of the kit is 5V， the battery on back is only for the power down save time.<br>Package included:<br>1 x Upgrade DIY EC1515A DS1302 Rotation LED Electronic Clock Kit 51 SCM Learning Board