WWZMDiB-DIY Learning Kit Introductory Electronic Components Kit Birthday Gift Desktop Decorations(Fun DIY Soldering Kit,Audio level indicator)

💎【Audio level indicator】: The input is connected in parallel to the two pins of the speaker or the audio output of the headphones, the higher the audio signal voltage (i.e., the higher the volume), the more the number of light-emitting diodes lit up.
⚡【Supply voltage】: DC9V - 12V
🎯Through the number of LEDs lit to reflect the strength of the audio signal, adjustable resistor R4 to adjust the strength of the input signal, J2 for the power input, J3 for the control of the display, shorted J3 for the strip display, J3 open circuit is a point display.
💡【learning target】：Through the assembly, debugging and production of the "Circuit principle and key components" machine, master the working principle of the "Circuit principle and key components", improve the skills of component identification, testing, assembly and debugging of the whole machine, and enhance the comprehensive practical ability.
💡【1】：Master and understand the specific functions of each part of the circuit in the schematic diagram of "Circuit principle and key components", and improve the ability to read and recognize pictures;
💡【2】：Compare the schematic diagram and the PCB board to understand the component layout, assembly (direction, process, etc.) and wiring of the "Circuit principle and key components";
💡【3】：Master the basic methods and skills of debugging; learn to eliminate various faults in the welding and assembly process, and solve various problems encountered.
💡【4】：Be proficient in using various common instruments, meters and electronic tools, and master the testing methods of the main parameters, technical or performance indicators of components and the whole machine;
📞【Wholesale business】:We have been engaged in the wholesale and retail business of electronic related products for a long time. Welcome letter to discuss wholesale business. The larger the amount, the better the price.