Direct current ignites fluorescent lamp circuit

This is a circuit diagram for using direct current to ignite a 6-8W fluorescent lamp. It is a common-emitter intermittent oscillator composed of VT, which ignites the fluorescent lamp
through the intermittent oscillation wave induced on the secondary side of the transformer .     Practical application testing shows that when the power supply voltage is DC 12V, the continuous voltage after the lamp is ignited is 52V. 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. Ri and island can use 0.25W or 0.125W resistors, and capacitor C can be selected from 0. l-lyF. Changing the value of C, the frequency of the swatter also changes. Appropriate selection of C value can make the circuit most efficient. It is better to use E-shaped ferrite for the transformer. Wl—W2 - 40 turns, wire diameter is 0.35mm; W3-450 turns, wire diameter is 0.121mm.