Why Resistors BURN OUT (and how to choose the right one)

Se ti interessa guardare il nostro video in lingua italiana clicca questo link: https://youtu.be/H2VQYQKdJXk Today we’re talking about a tiny component that can still stop a multi-million machine: the resistor. We’ll see why it overheats, when it changes value, and what happens when you size it “just barely right”. At the end of the video we’ll also do an extreme test: we’ll push it to the limit. 🎓 Tips: if a resistor operates close to its limit, it changes value more easily over time (drift). It’s not just “it burns out or it doesn’t”: it can also make you measure a sensor incorrectly or throw off a threshold. In depth: 1. Film resistors (carbon or metal) These are the classic cylindrical resistors with colored bands. You can find them practically everywhere: on generic electronic boards, in signal circuits, in filters, and in a thousand other applications. 2. SMD resistors (chip) They are those tiny little rectangles mounted directly on the surface of PCBs. They are perfect when electronics need to be compact and produced in an automated way. The value is usually printed on top with a small numeric code. 3. Power resistors (wirewound, armored, heatsink-mounted) Here we go up a level: inside there is a resistive wire wound on a ceramic core, often enclosed in a finned aluminum body to dissipate heat. They are made to handle and dissipate a lot of power, for example in rheostatic braking of motors, in energy dumping on inverters, as load resistors in industrial panels, and so on. 4. Variable and “smart” resistors Here there are different families: • Potentiometers and rheostats: for manual adjustments of level, speed, calibrations. • NTC/PTC thermistors: they change resistance with temperature, useful as sensors or for soft-start. • Varistors: they are “protective”: at normal voltage they hardly conduct, but during a surge they become conductive and help save the electronics. • LDR (photoresistors): in which resistance changes based on light. • Learn more about JAES: https://jaescompany.com/index.php?lang=en • Discover more about our projects: https://jaescompany.com/elearning.php?lang=en • Here are some products installed by our technicians: https://jaescompany.com/catalogo_marche.php?lang=en JAES is a company specialized in the maintenance of industrial plants with a customer support at 360 degrees, from the technical advice to maintenance, until final delivery of the industrial spare parts. Follow us on our social media: LinkedIn: https://www.linkedin.com/company/jaescompany Facebook: https://www.facebook.com/jaescompany Instagram: https://www.instagram.com/jaes_company 1:16 What a resistor really does 3:03 Experiment: how a resistor protects an LED 5:40 What a resistor is made of 6:48 Types of resistors: from basic electronics to industry 7:26 How to read the value of a resistor 9:37 Sizing: when “just 0.1 W more” destroys your circuit