This project goes over the build an off grid survival fridge using a five gallon bucket . It has a peltier cooling module on the top. So no need of refrigerant or ice cubes. The materials you need to build are as follows. A 12V 12A Thermoelectric Peltier Refrigeration Cooling System unit from Amazon, a 5 gallon bucket , 4 gallon Styrofoam liner from Home depot.
This refrigerator works by the principle of peltier effect. The Peltier effect shows that a temperature differential is created when a DC current is applied across two different materials .The peltier unit is made of using two thin ceramic wafers with a series of n and p semiconductor materials sandwiched between them. The ceramic wafers add rigidity and provide the necessary electrical insulation for the module. The n type semiconductors have excess electrons, while the p type have a deficit of electrons with one n and one p making up the junction couple that creates the thermoelectric effect. When a DC current is applied to the circuit, the thermoelectric module can work as a cooler or heater depending on the direction of the current. A thermoelectric cooler or tech transfers heat from one side of the device to the opposite side against the temperature gradient creating a cooling effect.
We use heat sinks and CPU fans on the peltier chips to radiate and lower the heat generated on the hotter side and move the cooler air into the bucket from the cold side. The peltier setup in this build uses two 12V 92mm fans on the hotter side glued to a large 200m X 100mm Aluminum heat sinks, two 12v 5.8amps peltier chips are glued under two 40mm heat sinks using thermal paste. 2 40mm fans are also attached to the heat sink.
The Styrofoam liner is inserted in to the five gallon bucket . Two small rectangular cuts are made on the lid of the liner so that the heat sinks fits inside there and gets good airflow around the edges.
We cut a rectangle on the top lid of the bucket to allow the peltier module to sit in. Small vent holes are drilled on the sides of the lid using a standard quarter inch drill bit so that no hot air gets caught between the bucket lid and the Styrofoam lid.
Cut a small notch in the bucket using tin snips so the wires from the peltier units will come out without getting pinched under the lid.
You can hook this unit to 100 watt solar panels straight , 12 volt deep cycle battery, 12 volt transformer to the wall, or you can use your car CIG lighter. This unit can drop the temperature inside the bucket from 81 to 47 degree Fahrenheit in minutes.
- DIY Video : How to dig your own shallow water well for the gardenThis project goes over the instructions on how you can dig your own shallow hand pump water well using simple tools and save a lot of money. Before digging the water well, you need to know the ground. You got to have the right soil for this system to work. If your soil type is silt, clay, sand or loam, then its ideal .In our case, we have the first 10 or 12 feet of fine glacial silt and below that there is glacial deposits of river gravel. The first step is to dig a hole for the well casing. The tools you need to dig the hole are six inch post hole auger , three quarter inch extension pipe with coupling at the end and couple of wrenches. Once you have spotted the area where you want to dig the well, you start by applying downward pressure on the auger by twisting it. It screws itself into the earth filling its basket with material. When it's full, you pick it up and dump it aside or in a wheel barrel. Sharpening the auger can help it cut through tree roots but it will not stay sharp long. It is important to do your best to keep the hole centered. Once the bottom is reached, we pull out the auger and remove the basket from the handle and insert one of the extension using the pipe wrench. The next part is getting the casing down the hole. For the casing we are using a cheap and readily available six inch PVC sewer pipe. We use a rasp to smoothen the end of the pipe so that it fits a cap . A round piece of PVC flat stock is bolted and glued on top of the cap using a PVC glue. This becomes the mounting base for the pitcher pump. To get started with driving the well point, we need a long piece of 10 foot pipe and a sandpoint, a couple of drive couplings. The drive couplings are steel rather than cast which makes them stronger. But most importantly, they have that small diameter so that they can slip down inside, making them not much larger than the diameter of the sand point itself. The sandpoint is made of perforated stainless steel and a cast iron point at the bottom. We connect the sandpoint and 10 foot pipes using the couplers and some Teflon tape. Now you don't want to hammer on your drive point or any of your fittings without them being quite tight because you need those extra threads to spread the load. We drive the whole thing with a homemade post hole pounder which is a gooseneck trailer hitch ball welded into a piece of pipe. We insert the sandpoint with the extension into the well casing and start drilling by hand. We are gonna find out how far down that water is by dropping a string with a bolt tied to it to the very bottom. We finally attach a black ABS suction by sliding it down into our pipe .Then we cover the pipe with our PVC casing . And once the casing has been firmly tamped down, we will pack around the casing and tap that into place. The final step is to install the pitcher pump and prime it by add some water. The top cap is installed on the casing opening and the pump is bolted to the top of the cap. Priming the pump simply entails pouring a little water in that top basin. https://www.youtube.com/watch?v=9mG4j4I13y4 https://www.youtube.com/watch?v=6p5ked9gKuQ https://www.youtube.com/watch?v=334mj68JU0I
- How to recycle scrap metal in the backyard by building a simple Mini Metal Foundry from start to finishIn this project, we're using equal parts of sand and plaster to make a simple backyard foundry that's powerful enough to melt scrap metal in seconds. With this homemade furnace, we have the power to liquefy aluminum in the backyard and cast just about any object we can think of. You will need some big bag of play sand and some plaster of paris both of which you can find at your local hardware store for under $20. We are also going to need a 10 quart steel bucket and a tablecloth to cover anything. For this makeshift refractory lining we need One and 1/3 buckets full of plaster Paris or 21 cups, One and 3/4 buckets full of sand or 21 cups and 1 and 1/4 buckets filled with water or 15 cups. Mix everything together. It's really important to get all the dry powder wet and work out any lumps as quickly as possible. And after mixing for a couple of minutes, it should be fairly runny and roughly all the same color. Transfer the mix to the steel bucket upto 3 inches from top. We use the plastic measuring bucket to form the center of the foundry. Let the mixture dry for 3 minutes. Next step ,we turn an old steel fire extinguisher into a custom crucible. Depressurize the tank and unscrewed the valve from the top to make it safe and easy to cut in half with a hacksaw. At this point the plaster should be pretty well set. So let's dump the water from the bucket then use a pair of channel locks to pull the bucket out. Next step is make an air supply port .Using 3/8 inch hole saw and a metal cutting blade, we cut a hole to accommodate the one inch steel blower tube. The blower tube is made of one inch steep pipe ,one inch PVC coupling and one inch PVC pipe.Threads on one half of the coupling screw onto the steel pipe and the slip adapter on the other end simply pushes onto the PVC side easily. Next step is to build a lid to retain the heat.You need a couple of 4 inch U bolts.Make them stand upright into a 5 quart bucket filled with the insulating mix. To relieve pressure buildup, make a vent hole using a 3 inch hole cutting saw. This design works great for venting pressure and gives us the option to melt metal as well without even having to take the lid off the furnace. By the way, if you run out of soda cans to melt, you could try using it as a blacksmithing forge or even a barbecue for summertime grilling. We evenly place 5 charcoal briquettes at the bottom of the crucible made out of steel fire extinguisher, helps smelt the can faster once we fire it up. A hair dryer is taped to a PVC pipe and inserted a couple of one inch couplings to connect the steel tub eat one end and give the blower to a quick release feature. This way it's super easy to take apart and fits into a five gallon bucket for easy storage. The charcoal is filled it to the top and we breathe life into the steel furnace with a propane torch.The hairdryer is set to the low setting and blow a steady stream of oxygen on the charcoal to really heat things up. The lid we made keeps the heat inside so it conserves energy while it's bringing up the temperature. The coolest part is that the crucible lines up perfectly with the hole in the center. The container is three inches wide, which is the perfect size for melting standard size soda cans like these and at temperatures over 1000 degrees Fahrenheit . In order to isolate aluminium, first we remove the crucible making sure we have got a very secure grip with our tongs and slowly pour the liquid into a steel mold. The Soda cans are molded in the form of ingots.The purpose of an ingot is to keep some pure metal handy for when you want to make something cool. https://www.youtube.com/watch?v=hHD10DjxM1g https://www.youtube.com/watch?v=lSoWxG30rb0
- DIY Video : How to build a Powerful Mini Box fan for or off-grid use, camping, emergencies or everyday use