Potentiometer Controlled LED

In other not to get your LED fried you have to cater for the maximum voltage that reaches your LED. The potentiometer, when rotated to brighten the LED can allow the full source voltage to go across the LED. And in the diagram above, the source voltage is 9volts and that’s too big for the LED.

The solution to this is very simple. Before you ground the LED by connecting its cathode to the negative of your source voltage, connect a series resistor it. 220 ohms will work perfect.

Related Articles

Using the dual axis analog joystick module

Where are the game center squad?
Do you remember those guys behind the UCOM game pad who would be like “oh as for me I play FIFA well with analog” and at the end of the day they would still loose the match, eiiiii?
You know what, today we will be doing something more technical and fantastic with one of the joystick modules.
We will learn how to harvest the x and y coordinates out of the joystick and use it to control things in real life…..

The 555 timer IC.

As a hobbyist, engineer, or maybe an electronics geek or wherever you find yourself, you can’t really have the time and pleasure to know what goes on in all the million ICs in the world. However you can delve with me into this simple 555 timer to see whats going on in it. This can give you a certain level of understanding about almost all ICs.


Your email address will not be published. Required fields are marked *