This is a simple design for 4 Watt fluorescent lamp driver circuit. This circuit can be operated from a 12 V supply. This circuit is work with based on 555 IC. The first part of the circuit includes a NE555 timer IC wired as an astable multi vibrator. This is the figure of the circuit.
The output pulses from the IC are amplified by the transistor Q1. The transistor must use heat sink for transistor Q1. The transformer steps up the collector voltage to around 1KVto drive the fluorescent lamp. In the transformer is uses a 3 V primary, 230 V secondary, 5W transformer for T1. Before using the circuit, set the R2 at full resistance and switch on the supply, now adjust R2 so that the collector current is 300mA (use a multi meter) and this is the optimum setting for the lamp. Operating the lamp in this setting will give a better life. Power the circuit is from a 12V battery or 12V DC power supply. The L1 can be a 6 inch, 4W fluorescent lamp.
The output pulses from the IC are amplified by the transistor Q1. The transistor must use heat sink for transistor Q1. The transformer steps up the collector voltage to around 1KVto drive the fluorescent lamp. In the transformer is uses a 3 V primary, 230 V secondary, 5W transformer for T1. Before using the circuit, set the R2 at full resistance and switch on the supply, now adjust R2 so that the collector current is 300mA (use a multi meter) and this is the optimum setting for the lamp. Operating the lamp in this setting will give a better life. Power the circuit is from a 12V battery or 12V DC power supply. The L1 can be a 6 inch, 4W fluorescent lamp.
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