This is the Simple Fluorescent Lamp Inverter Circuit Diagram. This
inverter is very easy to construct, reliable, and even powerful enough
to light up a 15W florescent tube (if you cool your transistor well).
The only hard-to-find piece of this baby is the so-called yellow
inverter transformer. It's a miniature high frequency transformer that
has a 25mm x 20mm x 5mm ferrite core, 30 turns of primary, 15 turns of
feedback, and 250 turns of secondary all concentric, wound on plastic
frame than wrapped with a 'yellow' adhesive tape. If you can't find it
in your local electronic shops then search for old portable rechargeble
florescent lanterns since they have at least one yellow inverter. Of
course you can wind a handmade transformer which would do the same but
it is a very difficult task when you don't have an original to inspire
and it will still need an appropriate ferrite core.
Simple Fluorescent Lamp Inverter Circuit Diagram
This is a single transistor oscillator circuit. Current passed through
primary winding inducts a magnetic field to the core and the core gives
the energy back to the feedback winding with a delay determined by the
core material and windings. System then oscillates continuously on a
frequency depending on this timing. You cannot use 2SD882 with voltages
over 4.5 volts. It is only needed if you are going to feed the circuit
with only 4.5 volts. Equivalent transistors may not work as good as
2SD882 (NEC Electronics, Japan).
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