555 neon light high frequency and high voltage source circuit diagram

This power supply is composed of a time base circuit 555 as the core, and the circuit is as shown in the figure. 555 and R1, R2, C2, etc. form a multivibrator with an oscillation frequency of f=1.44/(R1+2R2)C2

The oscillation frequency of the parameters shown in the figure is 17.8kHz, and the duty cycle of the output pulse is close to 1:1.555. After the output is cut by D3 and other bottoms, it drives the high-frequency amplifier VT1. Due to the access of the base D3 and LED1, the amplifier It works in Category C status. C5 is used to prevent the occurrence of reverse peak voltage and protect the transistor VT1. The secondary of the amplifier transformer can output a high-frequency voltage of about 12500V, which can be used to drive a 3-6m long neon lamp to ignite and glow. VT1 uses high-power tube 3DK308A or BU406, its electrical parameters are 7A/400V/60W, ft is not less than 6MHz.

ck="window.open(this.src)" alt="Click to see larger image"/>