Introduction: How to Convert Fluorescent Starter to Thermal Switch
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Fluorescent starter is essentially two bimetallic strips in a sealed glass capsule, with a small gap between them.
The principle of this experiment is Metal expansion and contraction .
1- 12 volt CPU Fan.
2- 12 Volt supply.
3- Fluorescent starter.
1- Break the starter glass and try to not damage the metal inside (Take all safety precaution when you do that to avoid any injury).
2- Make sure that there is a small gap between two metal as shown in attached picture.
3- Connect the circuit as attached in the first circuit diagram and fix the starter about 2 cm above the candle.
When the candle lighted up ,the starter metal will expand and attached together , the fan will turn on and turn off the candle ,the two metal will de-attach and turn off the fan.
Note that CPU fan is a brush less dc motor and it will not cause spark in starting ,the spark can damage the metal and it will not work for long time ,so if you connect a load that take more current and cause a spark in the starter you can use transistor showed in the last diagram to avoid this issue .
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