In this mini-project, you’re going to build a remote-controlled LED. Once you’ve built it, it’s easy to expand the project to light up several LEDs, control a fan, or whatever else you’d like to control with a remote.
- 9V Battery
- Battery Clip
- Light-Emitting Diode (LED)
- Resistor 1 kΩ
- Remote Control Module (https://amzn.to/2lURWp1)
How to Connect the Module
The module has four wires going to it. From the Amazon page, you can find some photos that explain how to connect something to it:
The circles with plus and minus show where you’ll connect the plus and minus from your battery. You can use two different batteries; one for powering the module (3.5V-12V) and one for powering what you want to control (1V-24V).
Do not overlook the blue circle with an X inside! The blue circle is where you’ll connect the resistor and the LED (or whatever else you’d like to connect). That means the minus of the battery *is not* connected directly to ON on the board.
If you want to use the same battery for powering the module and the thing you’re controlling, which you’ll want for this project, here’s how to connect it (3.5V to 12V):
On the device I bought, these are the colors of the wires. But double-check the colors on yours before connecting it:
Black: Minus (-)
Red: Plus (+)
This means that the blue wire (ON) will be the positive supply to the thing you want to control. The black wire (minus) will be the negative supply to the thing you want to control. The black wire will also be the negative connection from your battery.
The red wire (plus) will be the positive connection from your battery. The yellow wire (COM) will also connect to the positive connection from your battery.
The input voltage can be from 3.5V to 12V.
Connect the components as shown above or see the video below. Press “A” on the remote control to turn the LED on. Press “B” to turn the LED off.
Make It Permanent
If you want a more permanent circuit, you can solder it onto a stripboard. Below I’ve drawn out the connections on stripboard in a way that you don’t have to worry about breaking any lines. You might notice that the LED and the resistor have switched places here – but don’t worry, they are interchangeable. The 4 colored wires are the wires coming from your remote module:
Control Other Things
It’s not only an LED you can control with this module.
You control what you connect between the blue wire (ON) and the black wire (minus). Connect these wires just as if the blue one was plus from the battery and the black one was the minus. The voltage between these wires depends on the input voltage you have used.
The maximum current that this module supports is 700 mA. It might support 1A, but the instructions claim that “it’s better to keep it below 700 mA”. So I guess that’s good advice =)
Did you make it? Don’t forget to show it off with a video or photo in the Show and Tell section!