The bird song lantern circuit is shown in the figure below. When the lantern chain is directly connected to 220V AC, the lantern will sparkle due to the bubble jump effect. At this time, each lamp is allocated approximately 12V AC voltage.
Solder Wire/bar is an indispensable material for the manufacture of electronic products .Tin wire,TIn bar and tin paste are the most widely used electronic welding materials,the technical level depends on the performance of solder joints and welding process performance.
Product specification: Ñ„12*330mm
295*20*13mm
Product Features:
Smooth surface,neat coiling,beautiful appearance,uniform distribution of additives,good continuity.
Less splash of additives in welding process,good mobility,good wettability,less smoke,less oxide slag,bright welding spots.
Widely used in a variety of wave slidering and manual welding of television,audio capacitors,circuit boadrds and communications equipment.
Including SnCu.SnAg.SnAgCu,SnAgCuSb.SnAgBi series.
Solder Bar,Solder Wire Bar,Silver Solder Bar,Lead-Free Tin Solder Bar Shaoxing Tianlong Tin Materials Co.,Ltd. , https://www.tianlongspray.com
The line is mainly composed of two oscillators. R1, R2, C2, and transformer B and transistor BG form an inductive three-point audio oscillator, and R1, R2, C2 and transistor BG form a trainer oscillator. The two oscillation signals are superimposed on the emitter junction of the transistor, because the two oscillation frequencies are different. It is the gap sound of the piezoelectric ceramic piece that emits a crying bird. Adjusting R1, R2 or C2, C3 can change the frequency of the two oscillating circuits, and satisfactory birding effect has been obtained. 
