Using a USB circuit is the most common method for communicating between devices and computers. In the old days usually people used the parallel port or the serial port. But these ports are becoming more and more rare. And on laptops they are almost non-existent. But all computers have USB ports. Yeah, and USB stands […]
This LDR circuit diagram shows how you can make a light detector. An LDR or “Light Dependent Resistor” is a resistor where the resistance decreases with the strength of the light. Here is the schematic for the circuit:
Recently I have been using this free circuit drawing software from Digikey. It’s called SchemeIt. If you need a simple and fast way to draw a schematic diagram, it’s the best. It’s browser-based so you don’t have to download anything. You don’t have to register. But if you want you can register and save your […]
“What is a resistor?” she asked. “It’s a component that resists the flow of current,” I said. “Hmm… I don’t get it. What does it do to my circuit?” she asked. “Well, it doesn’t actually do anything actively,” I said.
When you design a circuit board, you need to follow the PCB design rules of your manufacturer. These rules are the limits of the machine that makes the circuit boards. The first time I looked at the rules I got really bummed out because it seemed so freakin’ complicated. “Why can’t they just make my […]
Do you often wonder “how does a capacitor work”? At least I asked myself that many times when I was younger. I never really liked the “physics explanation”. It states something like “a capacitor works by storing energy electrostatically in an electric field”. I don’t know about you, but that sentence didn’t make me any […]