555 electronic candle circuit

Published:2011/5/24 2:52:00 Author:TaoXi | Keyword: electronic candle | From:SeekIC

As the figure 17-45 shows, the electronic candle circuit is composed of the 555 oscillator and the boosting circuit.etc. The astable multivibrator is composed of the 555 and R1，RP，C2.etc, the oscillation frequency f=1.44/(R1+RP)C2, by adjusting RP, you can make the oscillation frequency to 1kHz. The 555's output port drives the VT boosting amplifier circuit, the secondary stage of the transformer T can produce the 100V 1kHz singal, and this signal is rectified by the diode, then adds to the load neon tube to produce the soft and bright light. The transformer T uses the M4 type magnetic core.



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