Research on the basic working principle of insect repeller using broadband ultrasonic technology

Probe domestic switch needle KG300B head diameter 3.0 normally closed switch needle total length is 5

Filter 18.432M

Research and circuit analysis of the basic working principle of insect repeller using broadband ultrasonic technology

IC1 (555) and R1, R2, and C1 form an astable multi-harmonic oscillator with an oscillator frequency of f = 1.44 / (R1 + 2R2) C1. . Q0~Q9 sequentially generate high-level pulses to provide different charging resistors for the IC3 oscillator, so that the charging time constant of the IC3(555) multivibrator is different, and ultrasonic oscillation waves of different frequencies are generated.

Investment Casting

The castings produced by the Silica Sol Casting process have high dimensional accuracy and can reach the CT4-8 level specified in GB/6414-1986. The surface roughness value is low, which can reach RA0.8-6.3Î¼m. No machining; the silica sol casting process also produces castings with more complex geometries

Investment Casting,Lost Wax Casting,Steel Investment Casting,Stainless Steel Investment Casting

Tianhui Machine Co.,Ltd , https://www.thcastings.com