DAOKAI Welding Practice Board,1805 SMD/SMT Components Practice Board Practice Kit 15-way Color Light Controller DIY Soldering Skill Training Board for Competition Experiment, 5V

• Product Specifications: Power Supply: DC 5V; Board Dimensions: 59x48mm/2.32x1.89in, Board thickness: 1.6mm;The completed project is a beautiful flowing lights circuit.
• Enhance Knowledge & Skills: This DIY soldering kit helps you understand the fundamentals of using printed circuit boards, familiarize yourself with various electronic components, and provides a practical opportunity to hone your soldering skills, whether for you, your children, students, or DIY enthusiasts.
• Premium Materials: Standard PCB material, tinned pads, high-strength fire-resistant, and shockproof materials, designed for repeated assembly and disassembly.
• Easy to weld: The clearly mapped and marked connections on the circuit board make it easy to assemble. You can refer to the markings on the PCB board to weld each component.
• Applications: Widely used in electrical and electronic technical skills competitions, competitions in secondary and higher vocational groups, vocational skills training, electronic enthusiasts.
• Package includes: You will get 1 x SMT Components Soldering Practice DIY Electronic Kit, 1 x Tweezers, 1 x AA battery box.
• Note: This surface-mount soldering practice board is supplied as components, requiring manual assembly. Basic electronic knowledge and hands-on ability are necessary.

Product description: Board size: 59x48mm/2.32x1.89in Board thickness: 1.6mm/0.063in Working voltage: DC5V Circuit Introduction: This circuit is an LED automatic control circuit composed of digital integrated circuits CD4060 and 74HC138,The CD4060 is internally composed of an oscillator and a binary counter with 10 outputs. The external oscillator can be connected to a crystal oscillator or RC. The control circuit is connected as RC. Oscillation mode, R1-R10 series and C1-C10 are connected in series. The resistance of the series resistor is the sum of the resistance values ??of the resistors. The series capacitance of the same capacitor is equal to the capacity of a single capacitor/capacitor, 104/10. After the CD4060 oscillator circuit starts to oscillate, the counter counts the oscillating signal, and each bit of the counter continuously flips with the count, thereby outputting a square wave signal with a frequency from high to low on the pins Q4-Q14, where Q4-Q10 Each of the light-emitting diodes L9-L15 is driven such that the seven light-emitting diodes produce flicker of different frequencies. Q12-Q14 is connected to the input terminal of integrated circuit 74HC138, 74HC138 is 3-8 line decoding circuit, only one bit is low level at the output end. As the data at the input changes, Y0-Y7 sequentially becomes a low level, thereby forming a water-light effect on L1-L8. When the CD4060 overflows, it will become 0 again. Thereby achieving automatic control of 15 LEDs. Package List : 1x SMD Component Welding Practice Electronic Kit 1 x Tweezers 1 x AA battery box