Common leds are used to encapsulate the elements.
One, LED to the foot forming method
It is necessary to be 2 mm from the gel to bend the bracket.
The scaffold must be formed by a fixture or by a professional.
The scaffolding must be finished before welding.
The stent is formed to ensure that the pins and spacing are consistent with the circuit board.
2, the Angle of the LED is bent and the foot is cut
The position of bending and cutting is greater than 3mm when the LED is bent and the foot is cut.
The bending should be done before welding. When using LED lights, the spacing of the PCBS is matched by the spacing of the LED feet. When cutting the foot due to cut the foot machine vibration friction produce high voltage static electricity, so the machine should be reliable grounding, do a good job anti-static (ion fan to eliminate static electricity).
When using chemicals to clean the colloid, you must be careful because some of the chemicals are damaged on the surface of the colloid and cause discoloration such as trichloroethylene and acetone. It can be cleaned and impregnated by ethanol, and no more than three minutes at room temperature.
4, LED overcurrent protection
Overcurrent protection can be a series of resistance to leds to ensure the stability of the work
The formula for resistances is R = (vcc-vf)/IF
VCC is the voltage of the | voltage regulator, VF is the LED drive voltage, IF it is for the current
LED welding conditions
1. Iron welding: soldering iron (30 w) highest tip temperature does not exceed 300 ℃, welding time is not more than 3 seconds, welding position from colloid at least 2 mm.
2. Wave soldering: dip soldering the highest temperature 260 ℃, dip soldering time not more than 5 seconds, welding position from colloid at least 2 mm.