DIY SMD Welding Test Kit High-strength Welding Training For New Starter Learning

Feature product nameSMD soldering test kitPCB materialFR 4PCB sheetPCB size146 100mmBoard colorWhite on green backgroundproduct weight62gPower supplyDC5VSuitableJunior soldering patcherComponent descriptionUse common chip components Principle description 1 Jl and J2 are the power supply input terminals of the entire patch board Connected to AC6V can work normally During normal operation all the LED lights of this kit can work normally At first each group of LEDs flashes in water flashes at intervals and finally all points All LEDs light up and flash again so cycle to check whether the LED is working and whether it is soldered well If it is found that the corresponding LED does not flash it indicates that the welding is wrong or virtual welding 2 The AC9V power supply is rectified by D1 D4 diodes and then passes through each filter capacitor to pin 1 of the voltage regulator chip 78M05 LED97 is always on the rectifier circuit works normally and the output of DC5V is supplied to the entire test circuit through pin 3 3 This test circuit is controlled by a single chip microcomputer to control the work of 8 groups of 8 bit LED lights Each group is composed of a 74HC573 and 74HC164 a group can control 8 LEDs a total of 12 groups Figure 1 is a control schematic diagram of a group the LED lights are all lit and can flash during normal operation Package includes 1 x DIY KIT