Good morning. I am a student interested in DIY.
I am going to make a remote control by referring to the example of Arduino's IRRemote library.
What I am trying to make is not just a remote control, but a remote control that can zoom with a lens by putting a 3W power LED inside the Daiso lantern housing.
I'm going to use it when I'm playing a prank to turn off my friend's TV when watching the World Cup or Olympic Games.
I bought two types of IR LEDs, 3W 850nm and 940nm, and three types of diffusion angles of 60°, 90° and 120°.
I am trying to drive an LED with an Arduino, but referring to the articles by intellectuals, I got an answer that you must use TR to drive a high output LED.
I don't have any electronic science knowledge, so I don't know the part name or type, so I want to learn which one to use to suit the purpose.
1. Among transistors, can you tell me a transistor that can be controlled by Arduino 5v and can switch currents exceeding 1A.
2. I heard that the transistor acts as an electronic switch that controls large electricity with small electricity. I am wondering if it will work even if an LED that uses a voltage smaller than the voltage between the base and the emitter (5V) is connected.
Connect the-to the emitter of the TR, the-of the LED to the collector, and then connect the + part of the 3.7v battery to the opposite leg.
3. What should be the resistance between the base of TR and the PWM output of Arduino?
Answer B
I don't know the gist of the exact question.
It is understood that you want to turn on the LED using the Anuino's output signal or send a signal of another amplified current or voltage to another device or circuit.
Since the Arduino output signal is very weak, it cannot be used directly as a power source.
It's just a very weak signal.
Imagine that you need to turn on an LED light of about 5V 1A using this signal.
Put such a weak LED signal into the TR as a base and put the actual power to turn on the LED into the input side of the TR.
Then, the power from the input side of the TR comes out to the output side by the weak power entering the base of the TR.
Then you can connect the LED lights to the output side.
TR is not the only way to do this.
When you need to operate 220V power, it can be difficult with TR. It doesn't have capacity.
So, I use TR and use a relay again, and if the capacity is insufficient, I use MS (magnetic switch).
The motor that moves the elevator up and down in the apartment will be a three-phase 380V.
A three-phase magnetic switch will be installed in such a device..
Its control is also no different from the control for turning on the LED on the Arduino.
Since the power needs to be controlled with high voltage and current, the TR is enlarged to deliver the appropriate power, so that the electricity is supplied to the MS through a larger power supply.