1, LED pin forming method
1 must be 2 mm from the colloid to bend the bracket.
2 stent forming must be done with a fixture or by a professional.
3 stent forming must be done before welding.
4 bracket forming to ensure that the pin and spacing on the same line.
2, LED bending feet and cut feet when the attention
Due to the design of the need to bend the foot and cut feet, bending feet and cut legs on the LED, the bending foot and cut the foot from the bottom of the colloid position is greater than 3mm.
The bend should be carried out before welding.
When using LED lights, PCB hole spacing and LED foot spacing to be corresponding.
Cut the foot due to the vibration of the cutting machine to produce a very high voltage static electricity, so the machine should be a reliable grounding, do anti-static work (can blow the fan to eliminate static electricity).
3, on the LED cleaning
Care must be taken when cleaning colloids with chemicals, as some chemicals cause damage to colloidal surfaces and cause discoloration such as trichlorethylene, acetone, and the like. Can be wiped with ethanol, impregnated, the time at room temperature no more than 3 minutes.
4, on the LED overcurrent protection
Overcurrent protection is to give LED series protection resistor to make it work stable
The resistance value is calculated as: R = (VCC-VF) / IF
VCC for the power supply voltage, VF for the LED drive voltage, IF for the forward current
5, LED welding conditions
1 soldering iron: soldering iron (up to 30W) tip temperature does not exceed 300 ℃, welding time does not exceed 3 seconds, welding position at least 2 mm from the colloid.
2 wave soldering: dip welding maximum temperature of 260 ℃, dip welding time of not more than 5 seconds, dip welding position at least 2 mm from the colloid.