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A bit about me: I am an electronics repair engineer. My job focuses on diagnostics, repair and testing of industrial automation electronics, from all types AC and DC Motor Drive systems to Power supplies and programmable logic controllers.
My biggest passion is in all fields of electronics; I enjoy creating, hacking and tearing things apart. But I also love motorcycles, photography, and all kinds of tech.
I’m confused. If more light lowers the resistance, that would mean that there would be more current flowing through the circuit, powering the load (an LED for example). So, if there’s less light, there’s higher resistance, lowering the amount of current in the circuit. So the LED would turn off. At least, that’s how I’m understanding it. Is that right? Because that doesn’t make sense to me. I thought that you would want to power an LED or other kind of light source when it got dark?
its not the electrons from battery flowing to the circuit. the electrons from negative terminal of battery pushing the free electrons which already exist in the circuit.
Howdy, Brother! What resistor should I use if I have a yellow 10mm LED Emitting Diode (1.8-2.2V) powered by two AA Batteries (on/off switch in the loop)? Will 47 ohms work? I'm not even sure if I asked the question properly . Thanks for any assistance.
Renez diods pass current the opposite way depending on the negative base bias. As long as you have a modulated negative power supply giving no more than 153.6V reverse EMF. They work best in unstablized A/C high current motors. The motor industry were to use this method of voltage control in hybrid cars but found they were unstable in resistance due to vibrations while moving.
Great instruction, but dude, get a good meter and power/voltage display for your vids! Beginners trying to keep up with allowances for shitty readings will be challenged.
The only issue I have with this video is that most "pots" are "carbon pots", with a carbon track internally. If the track were of most metals, the resistance would be practically nothing no matter where the wiper was, because of the high conductivity of metal...whereas a carbon track just a couple of inches long, at most, can be designed to have a maximum resistance ranging from ohms to mega-ohms or more. A metal track would have to be microscopic in width to achieve such resistance in such a short length.
Why are at last half the videos and books out there showing current flowing through diodes in opposite directions from this? Is it just a matter of looking at conventional vs electron current flow? I always thought current went through diodes and SCRs in the direction of the arrow. Now I’m finding videos and books that say the opposite. Someone please explain…
As a beginner it would be helpful to see real world examples, installation tips, and to test them. I'll check the electronic parts site now and see what they look like
Hello . Why, for example, in an npn transistor, due to the existence of a diode between the base and the collector and the base and the emitter, but the diode of the base-collector is in the opposite state and against the current from the collector to the emitter, and practically no current should flow, so why does the current flow
Doesn't power flow in the same direction as conventional current, that is from +ve to -ve? I think you describe the direction of electron flow which is surely a matter for a different video about the directions of conventional current versus electron flow? 🔋
Started off ok, but I could've paid attention more if you had a decent top down view, I didn't know exactly which holes you used to stick negative & positives. There are more questions than answers, I have to know exactly what goes where & why. I need a definitive pattern & rhythm for it to sink in.
