Bald Engineer

Dumpster diving can be a rewarding experience for a maker. You never know what components you might be able to recover from electronics otherwise discarded. What can be hidden …

Whether you are an engineer with enough experience to be called a graybeard or a novice that keeps grabbing the wrong end of a soldering iron, there is one component that eludes …

When you need to buffer the output of an R-2R ladder or an RC filtered PWM signal, an op-amp is a single chip option. Unlike a discrete NPN transistor like a 2n3904, there is a lot …

After fighting bugs, bad connections, and burned out chips your project is working–or even done. The next step? Record a video, edit it, and upload it to YouTube. Too many steps? …

One of my early hobbies as a kid was collecting baseball cards. At every card show, I was on the lookout for the 1989 Ken Griffey Jr Rookie card, #1, from Topps.My collecting craze …

The latest AddOhms looks at why you need a pull-up resistor when using push-buttons. This video goes into what happens when you leave a pin floating, what a floating pin means, and …

Making the move to millis()-based code can be daunting. You have to rethink your logic, implement flags, program a state machine — and more importantly, start using millis(). …

Flag variables are great, and totally not evil, when you just have two states: ON or OFF. What about when you have multiple states? Is there an option better than creating multiple …

Recently I picked up a device called Logic from Saleae. It’s a 4-channel USB-based logic analyzer. While learning how the simple, but effective, UI works I ran some timing …

Found this one while going through some old files. One of my favorite volunteering activities is introducing kids to engineering. After judging a FIRST competition, I learned about …