EIM Engineering

Background Sea Ray boats from 1999-2008 used a CAN bus switching system to control components such as the lights, water pumps, bilge pumps, blowers, etc. The Electronic Interface Module (EIM) system was prone to failure over time and had the potential to cause fires. Sea Ray realized this and did away with the EIM system,…

I used to have a record player in my bedroom paired with a couple of old bookshelf speakers and my dad’s beautiful old Pioneer stereo from the ’80s. The record player was also vintage and wasn’t great even back then. I wanted to move my setup to my office, but I also wanted it to…

Okay, so I sold off all my server equipment. I decided against using pfSense, and I wanted something more simple, but still powerful enough to create VLANs and firewall rules. I talked to the IT department at work and they recommended Ubiquiti. I had heard of Ubiquiti before, and had heard generally positive things about…

In Part 1, I left off needing a way to use Home Assistant while I wasn’t on my local network. Prior to all of this, I had upgraded from the default Verizon router to the Deco M5, a 3-piece mesh system from TP-Link. My router is in the basement, so coverage was pretty terrible before…

I have recently taken a foray into the world of networking. I sort of fell into it by accident, but found myself enveloped in learning about it for a period of months. It all started when I was designing a system at work. The backbone of our communications is Ethernet, and therefore requires some amount…

Greetings and welcome to the inaugural post on what is sure to be an extremely popular and culturally-relevant website. My name is Max Ehrlich, an electrical engineer with 6 years of experience in the defense industry, and I plan on using this site as a portfolio for my various projects – mostly for myself –…