SMD Components Difficult Soldering Practice Board Kit SOP QFP/N BGA Double-sided SMT Soldering Skills Training

Product name: High difficulty full mount welding practice board Product model: TJ-56-649 Working power supply: DC5V (Android USB interface) Board size: 74 • 53mm Board thickness: 1.6mm Board material: FR-4 tinned double-sided international standard board, green solder barrier layer, all solder pads are tinned, high-strength fireproof and anti drop material, which can be repeatedly disassembled. Product Introduction: The power part of this kit is composed of an Android USB interface and a self recovery fuse F1. It can be powered by using an Android phone charger or power bank, and has circuit protection function. The upgraded circuit board can switch modes by turning the switch K2. Mode 1: PWM mode, automatic water flow, power on to view the effect. Mode 2: KEY mode, manual flow, Press K1 to flow once, and when some LED lights cannot be lit normally, this mode can be enabled. Use a multimeter to check whether all signals are normal, fully train students' ability to troubleshoot, better understand the working principle of the circuit board, and accumulate experience in troubleshooting. Circuit Diagram: Package Includes: (two sides)