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Refer to the guide below as a reference to inspect the quality of your soldered joints.
7) Once the HEX3653 chip is soldered on the PCB, place the resistors (R1, R2, R3 & R4), the
ceramic capacitors (C3, C4 & C5), the inductor (L1) and the diodes (D1 & D2) on the board
and solder them from the bottom side. You can solder these through-hole
components one by one or all at once.
8) Place the transistor (Q1) and the crystal (Y1) on the board and solder them from the
bottom side.
9) Insert the LED and the electrolytic (polarized) capacitors (C1 & C2) on the board and solder
them from the bottom side.
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