QUESTION: “Why doesn’t it matter which leg of a led you put a resistor on? Surely if it’s on the anode then that’s fine, but if it’s on the cathode then the current will flow through the anode first and burn out the led? I’m sorry if that’s a silly question but I’m still learning.”
Have you heard the story about the bug in the relay?
I was going to tell you a story about a bug…. Specifically a moth inside a relay… An error in a software program is usually called a “bug”. In a circuit, it’s not that common to call an error a “bug”. But if your circuit isn’t working, the process of looking for the error is […]
How to fix your circuit with a rubber duck?
Imagine having a rubber duck on your desk. A nice and yellow rubber duck. Like the one you would have in a bathtub. Then imagine you are stuck on a problem with your circuit. It just doesn’t work – and you have no idea why. There are no one around to ask. Except your rubber […]
Display that shows when the next bus is coming
Imagine having a tiny little screen next to your computer, or maybe next to your door, that tells you when the next bus is leaving from your stop. Well, I decided to make this. Most of you probably don’t know this – because I haven’t told you – but I am also a tech journalist […]
I burned myself on the soldering iron
I was soldering the circuit for the last part of the microcontroller tutorial. And I burned myself on the soldering iron. Ouch! But, I lived to tell the tale. Hopefully that taught me the lesson of being more careful, so that it will go another few months before I do it again. I realized something […]
I made a light blink today!
But not using relays or transistors… I used a microcontroller. As you may or may not have noticed – I have been writing a tutorial on microcontrollers. Which you can