Title is a little sensational but this is a cool project for non-technical folks who may need a mini-internet or data archive for a wide variety of reasons:
“PrepperDisk is a mini internet box that comes preloaded with offline backups of Wikipedia, street maps, survivalist information, 90,000 WikiHow guides, iFixit repair guides, government website backups (including FEMA guides and National Institutes of Health backups), TED Talks about farming and survivalism, 60,000 ebooks and various other content. It’s part external hard drive, part local hotspot antenna—the box runs on a Raspberry Pi that allows up to 20 devices to connect to it over wifi or wired connections, and can store and run additional content that users store on it. It doesn’t store a lot of content (either 256GB or 512GB), but what makes it different from buying any external hard drive is that it comes preloaded with content for the apocalypse.”
If the monitor draws even 20W, you’re gonna be tired of that eBike generator solution really quick.
The average laptop is 65W. So the 40 amp solar battery station I built with a 100w panel could run a laptop 7 hours a day without any issues at all. Plenty of time to get actionable information out of it.
Sure, solar works. And batteries work - for about 3000 charge-discharge cycles.
That’s… a lot of cycles. That’s almost a decade. Plenty of time to build an electric generator from scratch by traveling on foot to a copper mine and smelting the wire yourself. Unless you manage to pull an alternator from a car that can’t find gasoline and save yourself the trip. From that you could make a gravity battery or any number of other options.
Point being, after 3000 cycles, it’s toast and there’s no fresh bread available.
Yes, you could construct something, but I think you’d be pretty amazed at how maintenance intensive a 1kWh gravity battery is.
Point is that 3000 cycles is more than enough time to find or make a replacement even if society doesn’t rebuild.
If you’re living somewhere with enough easy food, water and shelter that you’re not spending all your time just handling that. Making groceries takes a lot of time and effort.
The average hunter gatherer only worked for about 3-6 hours a day. They had more free time than we do.
The average hunter gatherer had food forests planted by their ancestors, wild herds of meat for the taking and a lifetime of knowledge transfer and physical training in living that lifestyle.
You may be adaptable and intelligent and have wikipedia by your side to tell you what to do, but Wikipedia is written by people living in today’s society, not that reality. 90% of today’s people will suffer horribly getting in the physical and mental condition required to do a hunter-gatherer daily routine in 6 hours or less.
But not you, you’re awesome and you get it done in 3, so that leaves you time to go mine copper ore, smelt it into wire and other such things - in reality, no, for the duration of your remaining life scavenging the wreckage will be more productive than DIY from the earth, but scavenging requires a lot of travel and even e-cars won’t be getting around very well.
You’d be charging a battery, not running directly off the bike. Still, solar panels are extremely cheap these days. I picked up a 120 watt panel for 50 bucks recently, it could keep something like this running for hours each day.
So, I believe a tolerable generator load for most people to pedal is around 10W… battery charge / discharge is maybe 80% efficient, so you’re netting 8W into your storage. Pedal relatively hard for an hour and you might get 20 minutes use of your IPS LCD screen.
Solar panels are indeed the way to go.
I mention ebikes because if we’re in an apocalypse situation, your solar panels may not be very efficient. There are a ton of electric motors out there, so generating power is totally feasible in a prepper situation even if the sky is torched Matrix style, just attach any electric motor to a bicycle and you’re good to go (or water or wind turbine, etc).
This unit can connect to a cell phone, that’d be a much less energy-expensive way to interface with it.