Not a long time ago were all the tube lights packed with electrical circuits comprising of elements like choke, starter, etc instead of electronic circuits. We have all discarded faulty starters at some point of time or have seen someone replace them. We will now see how one can make something useful out of even a faulty starter.
STARTER: A quick introduction A glow starter or commonly known as starter is used in the tube light circuit to provide an initial current to filaments of the tube light. You may read more about the working of a starter in a tube light circuit here (external link).
Now let's talk about the JUGAAD. (Adult supervision advised)
If you plan on using a heat (or flame, to be on a safer side) sensor for you school/college project and don’t have a huge budget for buying expensive sensors, here’s what you need to do:
1.Grab a faulty/new (cheapest @ around INR10) tube light starter.
2.Remove the cylindrical covering.
3.Break the glass case/seal with care to find your sensor kept preserved for you.
This sensor works as a switch and closes a circuit when put in a series configuration and exposed to heat/flame. Since it is a Jugaad, you will need to calibrate the device that you are building properly because the operating temperatures will vary and so will the results.
1.‘Response to stimuli’ working model (SKILL: 7/10): Build an arm model with our sensor on one of its finger tips. Put a motor capable of moving the arm (away from flame) about a pivot whenever switched on. Connect the sensor as a switch in the motor circuit. And you are done. Expose the finger tip to a flame and it shall trigger your arm model to move away from the flame. Nice reflexes, right?
2.‘Over heat detection’ (SKILL 3/10): Install the sensor above a test tube with some water inside it. The sensor should be put in series with an LED or a similar alerting device and a suitable power source. (Not you mains power supply of course!) And you are done. Heat the test tube, boil the water and your detector will detect overheating. CALIBRATION NEEDED.