When assessing a building’s network security from an adversarial perspective, it can often be helpful to look for open network ports that are easily accessible. These ports can provide a means for an adversary to plug in a convert network device and may also provide the means by which further network compromise may be possible. …
Continuing with a focus on the 555 timer, this video tutorial looks at how to vary the pulse width of a 555 timer’s output. It’s all possible with just a a hand full components. By varying the duty cycle one may vary the blink rate on an LED or the voltage being fed to a servo. Enjoy! …
The 555 timer has many uses and in this video we’ll explore two different ways to utilize the output. First we’ll see how the the timer can be used to source and sink current and secondly we’ll look at a way to use the timer as a control mechanism for another circuit. If you missed …
When I was developing the VoIP Fundamentals course, I wanted a demonstration to illustrate the simplicity of the public switched telephone network. After combing through the internet, I came across this ingenious little project. With just a 9V battery, a resistor, a telephone cord, and a couple of phones you can create a simple little intercom …
9 Volt, Battery Powered, Telephone Intercom System Read More »
Happy New Year Everyone! I hope your holidays were refreshing and filled with hope, family, and friends. In this video I’ll be talking about a modification on the LM386 amp design used in the KiCad tutorial, we’ll discuss using a stereo output jack with a single-ended output, we’ll talk about the near future of Skinny …
Lately I’ve found myself surrounded by amateur brewers. Many of my colleagues and friends have really bought into making their own beer or cider and I’ve been curious about the process. Below is a video of what happens when you have no idea what you are doing.
On Thursday morning I woke to the realization that we needed a table in our guest bedroom for a visiting friend. Brandy and I talked about the options and after browsing around the internet, decided to make our own. I have been a big fan of the hipster “paid $1000 dollars for furniture resembling something …
Ever since Thanksgiving there’s been this beautiful, empty olive oil jar at the back of the cabinet. It was slated to be thrown in the trash, but I wanted to try and do something creative with it. In the course of searching for ideas, I came across a few internet videos of how to cut …
Recently I started a redesign for the Griffin amplifier. Why a redesign? It’s a long story that involved me talking to a lot of smart people. For this newest redesign, I needed my own test equipment, so I dropped a few bucks on this. She’s a beauty and I’ve been having a lot of fun. Give Me …
Rig It Up: How to Make a Signal Generator from an Old Microphone and Youtube Read More »
