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The voltage source circuit of 555 drive neon bulb

2015-01-27 19:35  
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The voltage source circuit of 555 drive neon bulb
As shown in the figure 9-30,555 and R1, R2, C1 make up the astable multivibrator.The vibrational frequency: f=1.44/(R1+2R2)C1, the parameter on the figure is about 600Hz. T1 is a step-up transformer, its voltage can reach 90V and drive the neon bulb after Secondary Coupling Signal to be rectified. T1 can adopt a radio output transformer.