Make: Electronics Chp3 Experiment 13

Experiment 13 “Roasting an LED” provides more explanation and continued experience with heat. In particular how heat can cause issues or severe damage to sensitive electronic components.  As you know, we just finished an experiment related to soldering; it is only fitting to drive home the point of how destructive heat can be.

Overall this is a short but important experiment related to soldering.  The general idea is that you need to understand where and how heat is being transferred. As this may be the difference between and working end result or frustration.exp13_3

The construction of the circuit for the is experiment reminds me of the original circuits built in chapter one, back when we didn’t use a breadboard. There is definitely a method to the madness here for sure.

That said, you’ll definitely need a pair of needle-nosed pliers and a set of helping hands to satisfy the circuit construction without frustration.exp13_4
Once built,  we begin by applying the wattage iron to the lead of the LED. The goal is to determine how long you can keep the heat applied before burning out the component. I was unable to burn out the LED with my low-wattage iron.

However, once I applied my workstation soldering iron (higher wattage) the LED it burned it out fairly quickly.

After you’ve destroyed the LED “for science”. The use of the copper alligator clip(s) is designed to demonstrate heat transfer away from the component that might receive heat damage.

More or less, you realize that will small sensitive components it doesn’t take much to burn them out or affect their performance. Therefore, always strive to use the correct iron and wattage for the job.

Experiment 13 materials:
9v battery
Long-nosed pliers
30-40 watt soldering iron
15-watt soldering iron
2 LEDS
1 470 Ohm resistor
Helping hands
Two copper alligator clips

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