When visiting my parents for Christmas, my dad showed me three electronic candles that did not work anymore. He told me he had changed batteries and showed me that they did not show any signs of life. I tried to get them to work as well, but no luck. It sounded like a really fun […]
Build Electronic Circuits Blog
Ohmify Gift Cards are now available
A year of learning and building electronics can take you from knowing nothing to being able to build pretty advanced projects. Is there someone in your life that is (or could be) interested in electronics? We are now offering gift cards for a 1-year membership to Ohmify + a starter’s component kit.
How To Use a Multimeter
In this mini-course, you’ll learn how to use a multimeter to take current, voltage, and resistance measurements. A multimeter is a tool you’ll be using frequently for troubleshooting, testing batteries, and a variety of other electronics-related tasks.
Build a Cool Christmas Tree Ornament in 5 minutes
Do you want to build something on your own for Christmas, but don’t have much time? Or no experience? Then this project is for you. One of the easiest ways to make a Christmas circuit that looks cool when you don’t have much time is to use a color-changing LED. A color-changing LED looks like […]
Halloween Electronics Project: Jack-O-Lantern
In this Halloween electronics project, I’ll show you how to make a cool Jack-O-Lantern. I used a 3D-printed carved pumpkin, but a real one works just as well (or even better!). The project is based around three normal LEDs that we control so that they look like a flickering flame. Since my “pumpkin” was very […]
MOSFET Gate Resistor
Do you need a MOSFET gate resistor? What value should it be? And should it go before or after the pulldown resistor? If you’re a bit impatient and just want the answer, here it is: You most likely need a gate resistor. And 1000 Ω will most likely work. See the circuit diagram below for […]