Direct current ignites fluorescent lamp circuit

It is a circuit loop that uses direct current to ignite a 6-8W fluorescent lamp. It is a
common-emitter intermittent oscillator composed of VT, which ignites fluorescent lamps
through the intermittent oscillation transition induced on the secondary side of the transformer .     According to the actual application test, when the power supply voltage is DC 12V, the continuous voltage after the lamp is ignited is 5zv. If the power supply voltage is changed to 6V DC , the number of turns of the transformer secondary winding W3 should be increased from 450 to 1600 turns. R can be a 0.25W or 0.125W resistor, and the capacitor C can be from o. Select between 1~lFcF. Changing the value of C changes the frequency of the intermittent oscillator. Appropriate selection of C value can make the circuit most efficient. It is better to use E-type ferrite for transformers. Wl—WZ - 40 turns, wire diameter is 0.35mm; W3-450 turns, wire diameter is 0.121mm.