Welding Soldering Practice LED Kit - MakerFocus DIY Electronic Circuit Skill Training PCB Board Module with Battery Holder for Beginner Welding Learner

Why choose this Rotating LED Soldering Practice Kit? 1. Reusable: This rotating led soldering practice kit use international standard board, all solder pads are tin-plated, high-strength fireproof and anti-drop material, which can be disassembled repeatedly. 2. Reasonable Design: The PCB board is designed reasonably, and all commonly used SMD components are used. 3.Circuit Introduction: The circular circuit in the middle is the water lamp circuit, which is composed of CD4017, NE555, and light-emitting diodes. It can work after the welding is correct. Parameter: Board Size: 3.50 inch * 2.28 inch * 0.06 inch Working Voltage: 3~12V.  Material: LED + PCB Package Including 16 * 0603 capacitor (C13-C26) 3 * 0805 capacitor (C27, C28) 104 17 * 0805 LED( D1-D11, D16-D19) Red 5 * 1N4148( D12-D15) 4007-SMT 5 * S8050( Q1-Q4) 9014-NPN 14 * 1206 resistor (R1-R12) 14 * 0805 resistance (R13-R24) 16 * 0603 resistance (R34-R47) 6 * 0805 resistance (R48, R61-R64) 10K 2 * 0805 resistor (R49) 2M 2 * 0805 resistor (R50) 470 16 * 0805 resistance (R51-R60, R65-R68) 1K 16 * 0402 resistance (RC1-RC14) 1 * NE555( U1) SOP8 1 * CD4017( U2) SOP16 1 * PCB