Project

9V Telephone Project

9 Volt, Battery Powered, Telephone Intercom System

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

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Rig It Up: How to Make a Signal Generator from an Old Microphone and Youtube

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

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