Upgrade DIY EC1515A DS1302 Rotation LED Electronic Clock Kit 51 SCM Learning Board.
Date, time, temperature by turns display With Alarm clock function.
- P1 for the development of the interface, not welding.
- 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 element: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: IAP15W413AS ( U1), DS1302( U2), S8550( Q1 ), Block USB (USB1), These
element should be noted in the same direction as the circuit board.
- Positive welding LED, digital tube, Thermistor, and other components of the welding in the back.
- 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.
- U2, C4, C5, Y1, BT1 must be welded before the digital tube, pay attention to the points on the digital tube.
- The working voltage of the kit is 5V, the battery on back is only for the power down save time.