Being able to generate even small amounts of electricity post-SHTF will be very valuable. A simple, human-powered, 12-volt generator can be constructed easily and for very little money. I started with a used bicycle that I picked up for $50 bucks. I recommend a bike with multiple gears as you are probably going to be using a very low gear most of the time. Single-speed bicycles tend to be geared very high, and it would take a large amount of effort to pedal one of those while powering a generator. To construct this system, at the very least, you will need a bicycle, a stand of some sort to keep it stationary, a 12-volt alternator, a long belt, wires and cables, switches and fuses, and a 12-volt battery. All of these items can be used, and could even be sourced after an apocalyptic event. Just remember, especially when considering electronic and mechanical devices with moving parts that two is one, and one is none.
Piecing It Together
As mentioned earlier, I started with a used bike, but I purchased a new bike trainer stand to make the whole thing stationary. I also bought a sheet of 3/4” plywood to use for mounting everything. Using “U” bolts and eye bolts, I mounted the stand to the plywood. You could use different methods of mounting your stand, but it is important that you be able to adjust the position of the bike from front to back as this will be your adjustment for tightening the belt. I removed the rear tire and inner tube from my bike and purchased a new pair of bicycle rubber rim strips. I used both of these on the rim to prevent unnecessary wearing of the belt. Now is a good time to go ahead and install your belt while you have the rear wheel off the bike. Though a used one would work, I purchased a brand new (remanufactured), 3-wire alternator for a 1970s model Chevy with the old-style pulley using a v-belt. Be sure to get one with an internal regulator.Continue reading“Building A Bicycle Generator, by Ed J.”