(Yet another tale told by an idiot: full of sound and fury, signifying nothing.)

While most of the civilized world still lives in an AC-powered fantasy—blindly feeding everything from LED night lights to USB-powered butt-warmers with 120 or 240 volts of brute force—I have seen the light. And that light is low-voltage DC, my friends. The rest of the world just hasn’t caught up yet, mostly because they’re still arguing over which wall wart is buzzing like a deranged cicada.
You see, it struck me—between radio nets and workouts—that the modern household is basically a museum of inefficient power delivery. We bring in 120/240 volts of alternating current, only to step it down and rectify it fifty different ways, each via its own cheap-ass switching power supply. These are the electronic equivalent of fast food: convenient, junky, and liable to give you indigestion. Or in this case, radio frequency interference (RFI).
My neighbor’s party lights provided some of the inspiration for this post when they were annoyingly switched on during a FT8 QSO with an XZ in Myanmar. (In English, this means I was making a ham radio contact with a rare entity with a weak signal that I wasn’t likely to encounter again for a long while). The aggregate RFI generated by a hundred little switching power supplies in a hundred gaily lit LED party lights blew the rare station away.
I can’t control what the neighbors do, but I realized that I had many similar little RFI generators right here where I could build a bonfire for them. So, I did what any moderately unhinged retired engineer would do: I built my own low-voltage DC infrastructure.
Exhibit A: The Ham Shack of Reason
The prototype lives in my ham shack—a 70-amp, 13.8V analog power supply feeding a fused distribution block with Anderson Powerpole connectors. Radios, network gear, LED lights, you name it. In my ham shack, wall warts are banned like smoking in a daycare. And guess what? It works. It works better than the duct-taped spaghetti of switching supplies most homes rely on.
Now imagine this scaled to a home-wide level. Yes, I know: “But the code! But the inspectors! But the liability!” Spare me. What I’m proposing is not a pipe dream—it’s a decentralized microgrid. Think of it as Tesla Powerwall’s weird libertarian cousin. Think outside the box, for a change!
Unfortunately for me, the ham shack is an island—a fourth bedroom repurposed as an electronics lab and radio station—surrounded by a houseful of noise producing electronic junk. I’ve walked around the house with a spectrum analyzer, which painted an abstract mural representing the spectral cacophony. Something’s gotta give. So, here’s my proposal.
Design for the Future That Won’t Arrive Until After I’m Dead
- Central DC Supply
- Input: 120/240VAC
- Output: 13.8V (or 12V), with optional 24V or 48V rails
- Redundancy? Absolutely. Dual supplies with diode isolation if you’re not a coward.
- Battery backup, charged by solar panels, for you clean energy solar worshippers.
- Distribution Panel
- Fused terminals
- Anderson Powerpole connectors
- Inline volt/amp meters if you want to flex on visiting electricians
- Device Strategy
Load Type | Voltage | Example Use |
LED Lighting | 12V | Ceiling, under-cabinet |
Radios | 13.8V | Ham gear (duh) |
Network Gear | 12V-48V | Routers, APs, Switches |
USB Devices | 5V | Phones, tablets |
HVAC Controls | 24V | Thermostats, relays |
Surveillance Cams | 12V | PoE optional |
Yes, yes—HVAC control circuits are traditionally 24 VAC. Don’t write in. This chart is about DC systems. If you’re trying to run your Nest off this panel, expect a meltdown. Or at least a stern lecture from a building inspector.
- Safety and CYA Measures
- Use correct wire gauges for the required ampacity – you’ll need to do the research until NFPA updates the NEC
- Fuse everything – high current DC sources can burn down houses as efficiently as AC
- Label wires like a madman preparing for a forensic audit – you do this already for your AC circuits, right?
- Why It’s Not Completely Bonkers
- Lower standby losses – your damn wall warts are bleeding you dry
- No RFI from garbage switchers
- Easy solar + battery integration
- Modular and serviceable
You won’t have to wait for Amazon to deliver a proprietary 19V wall wart just because your digital picture frame croaked. Your centralized DC power supply with solar-fed battery backup will be 99.999% reliable.
And you’ll finally have an answer when someone asks, “Why do you have a server rack in your guest bedroom?”
The Catch? Standardization.
Right now, there is no standard. It’s the Wild West of voltages—5V, 12V, 19V, 24V, 48V—and connectors ranging from USB-C to coaxial jank plugs last seen on 1980s answering machines. If manufacturers ever get off their collective ass and agree on a couple of DC standards, the wall wart may finally die the ignoble death it deserves. USB-C was a start. Let’s keep moving toward this standardization goal!
Hell, that’ll probably happen around the same time my cremains are being scattered over Mount Nittany. Maybe I should lobby with RFK, Jr. to have him declare wall warts a health hazard to be summarily banned by fiat?
Final Thoughts from the Turkey
This isn’t a crusade. I’m not trying to change the world (although we’d all be better off if it ran my way). I just want a house that doesn’t look like a Radio Shack exploded. And if that means running my own personal DC microgrid with Powerpoles and inline fuses, so be it.
At the very least, maybe one of my six loyal readers will unplug a wall wart or unscrew an LED replacement bulb, look at it with disdain, and say, “You know, the Turkey was right.”
Or maybe not. But damn, it feels good to engineer like it’s 1979.