The first thing this tutorial does is wire the LED directly to the battery. This tests both the battery and the LED before actually building the circuit. And I understand that it is very practical to know the components aren't actually broken before you begin building a circuit. In this case, with a 3V battery, that works just fine, but, as far as I understand, with more powerful sources, such as a 9V battery or a 12V power supply, this could actually damage your LED. So even though I understand the practicality of quick and dirty testing the components before starting, I thought it was a bit strange. I am sitting here thinking, ok so I want to try to power up a LED without burning it and I'm watching this tutorial, expecting to get a lesson in how you need to protect the LED with a resistor and how to find which resistor you need and the first thing the lesson does is connect the led direct to the power source...
You need to know the specs of the LED I think. Suppose it's a 3V LED, you would need a resistor to drop 6V. I think without knowing the specs of the LED you cannot know which transistor strength you need.
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The first thing this tutorial does is wire the LED directly to the battery. This tests both the battery and the LED before actually building the circuit. And I understand that it is very practical to know the components aren't actually broken before you begin building a circuit. In this case, with a 3V battery, that works just fine, but, as far as I understand, with more powerful sources, such as a 9V battery or a 12V power supply, this could actually damage your LED. So even though I understand the practicality of quick and dirty testing the components before starting, I thought it was a bit strange. I am sitting here thinking, ok so I want to try to power up a LED without burning it and I'm watching this tutorial, expecting to get a lesson in how you need to protect the LED with a resistor and how to find which resistor you need and the first thing the lesson does is connect the led direct to the power source...
Excellent tutorial. Thank You.
Excellent. Thank you.
new sub checking a few of your videos on breadboards :) thanks for posting :)
thank you❤❤❤
What will be the strength needed for a resistor for a 3mm ultraviolet LED with a 9V batterie?
You need to know the specs of the LED I think. Suppose it's a 3V LED, you would need a resistor to drop 6V. I think without knowing the specs of the LED you cannot know which transistor strength you need.
Can I use ur TH-cam videos to teach people?
which resistor is that