EC1204B_Electronic welding assembly Tutorials.pdf

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EC1204 Pv1.2

Electronic welding assembly Tutorials

Welding sequence: low to high

Note: Step 5 and Step 7 can not turn, or not assembled welding.

Step 1: Complete SMD components welding; following two charts

PNP Transistor：Q1、Q6、Q7、Q8、Q9、Q10、Q11、Q12、Q13)

10K Resistor：R6、R12、R14、R16、R18、R20、R26、R29、R31、R32、

R33、R34、R35

47 ohm Resistor：R5、R11、R13、R15、R17、R19、R25、R27、R30

20pF

apacitance：C3、C4

104 capacitance：C2、C5

PNP Transistor：Q2、Q3、Q4、Q5

10K Resistor：R1、R2、R3、R4、R21

47 ohm Resistor：R7、R8、R9、R10

20pF capacitance：C6、C7

Step 2: Welding and 32.768KHz 12MHz crystal oscillator, cut excess pin

flat

32.768KHz crystal shown above is recommended for welding, so you can

hold the crystal.

Step 3: torch lights installed, note the location of the + and red light

installation,D5*、D10*、D15*、D20*、D25*、D30*、D35*、D40*、

D45*、D50*、D55*、D60* are the red lights.

after assembling books and

other things to suppress the formation of all the lights, and then rewind

over and solder one pin of a pin, finished weld 60 LED lights will cut all of

its pins

Step 4: Welding sensor DS18B20, cut flat extra pins.

Step5: Welding three buttons

RST, MODE, PLUS;

8-pinIC socket

U2;40-pin

IC socket

U1;battery

holder

BT1.