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  • AndrewK68 followed molds-and-casting channel 2 years ago
  • AndrewK68 commented on Mrballeng's instructable How to solder aluminum. 2 years ago
    How to solder aluminum.

    You can increase the strength of your brazed joints by putting a bevel on the edges where they meet. The bevel should be half the joint, so if you have a butt joint (180 degree) then two 45 degree bevels. Don't cut the bevels all the way through - about half the thickness of the material should be good. This allows more filler material to penetrate the joint.

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  • How to Lose 100+ Pounds and Keep it Off For Life

    Using online calculators have been the number one cause of dieting failure in people I've worked with. They are based on USDA height-weight-gender tables tabulated fifty years ago that looked at statistical averages of people that were subjectively judged to be healthy. A responsible weight loss plan is specific to the individual. A person needs to establish their existing caloric intake levels by keeping a log of everything they eat for a week. They they should cut no more than 20% of their calories from that level. Any more than this will dip into the energy needed to maintain metabolism.There is no rate of weight loss that can be judged healthy alone. A 25 year old man who weighs 335 lbs and does intense exercise 7 days a week can safely lose 4 lbs/week. A 40 year old woman who weigh...

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    Using online calculators have been the number one cause of dieting failure in people I've worked with. They are based on USDA height-weight-gender tables tabulated fifty years ago that looked at statistical averages of people that were subjectively judged to be healthy. A responsible weight loss plan is specific to the individual. A person needs to establish their existing caloric intake levels by keeping a log of everything they eat for a week. They they should cut no more than 20% of their calories from that level. Any more than this will dip into the energy needed to maintain metabolism.There is no rate of weight loss that can be judged healthy alone. A 25 year old man who weighs 335 lbs and does intense exercise 7 days a week can safely lose 4 lbs/week. A 40 year old woman who weighs 160 lbs can safely lose a little over 1/2 lb for week if all she changes is diet. You have to account for your resting metabolic rate, your activity level, your age and gender.

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  • AndrewK68 commented on Darthorso's instructable Understanding Italian Gestures2 years ago
    Understanding Italian Gestures

    Peter Griffin did it better. BIPPITEH BOPPITAY!https://www.youtube.com/watch?v=kQA07B0X6jU

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  • AndrewK68 commented on danielknox's instructable LoRaWAN Gateway2 years ago
    LoRaWAN Gateway

    I've had good luck with large diameter PVC pipe. You can never make anything truly waterpoof, however, so I focused on making it hard for water to get in, and easy to get out. Dessicant packets from shoe boxes do a decent job of moderating humidity, and drip loops, drip loops everywhere!

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  • AndrewK68 commented on BossyRangs's instructable So you dropped your no.4 hand plane?2 years ago
    So you dropped your no.4 hand plane?

    Wood bodied planes are GREAT! They're terribly under-valued because everyone is trying to score that pre-war bailey pattern, and pass right over the wood planes. I've built up quite the collection of rabbets, rounds, hollows and a decent jointer. And they get some use - they're still good tools, even though some of them are over a century old!

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  • AndrewK68 commented on FlorianBecker's instructable The ultimate wifi network2 years ago
    The ultimate wifi network

    I faced a similar problem with UHF antennas that I built. Anything you coat them with to prevent corrosion (a) doesn't really prevent it, and (b) often changes the frequency characteristics. (Which is the problem with allowing corrosion.) My solution was to stick it into a large diameter PVC pipe that was capped at both end. Then I used a can of air (keyboard duster spray) to purge the container. The "air" is actually diflouroethane, otherwise known as R-152a refridgerant. It is chemically neutral, has zero ozone depletion potential, a very low global warming potential, and if it escapes, the atmospheric life is less than 16 months. Better still, if you can get dry nitrogen, that works better and it's basically cheaper and completely safe for the environment. The outside conne...

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    I faced a similar problem with UHF antennas that I built. Anything you coat them with to prevent corrosion (a) doesn't really prevent it, and (b) often changes the frequency characteristics. (Which is the problem with allowing corrosion.) My solution was to stick it into a large diameter PVC pipe that was capped at both end. Then I used a can of air (keyboard duster spray) to purge the container. The "air" is actually diflouroethane, otherwise known as R-152a refridgerant. It is chemically neutral, has zero ozone depletion potential, a very low global warming potential, and if it escapes, the atmospheric life is less than 16 months. Better still, if you can get dry nitrogen, that works better and it's basically cheaper and completely safe for the environment. The outside connector was then thoroughly sealed with high temperature silicone at the pass-through point. I've had the antenna up for two years now, and there have been no changes in frequency characteristics.

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  • Bicycle Cell Phone Charger (Wind Turbine with build in Battery)

    Better inform every automotive engineer who has ever designed a reluctor for anti-lock braking systems... after 22 years of using this design, we're all going to be in deep stuff...

    Step 1: Glue tiny rare earth magnets around rim with epoxy.Step 2: Glue tiny coil to brake caliper. Run wires up the brake cable to handle-bar mounted charge controller.Step 3: Profit.

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  • AndrewK68 commented on HomeRepairTutor 's instructable Soldering Quick Tips2 years ago
    Soldering Quick Tips

    Key points - for a proper solder joint, the heat that melts the solder should come from the piping and fittings themselves. Don't apply heat directly to solder; if you remove flame from the joint, then touch it with solder, the solder should immediately turn liquid and flow into the joint, almost seeming to disappear. Keep the flame on a nearby part of the fitting or pipe so that the joint doesn't cool down too much, however. Do not over tighten the pipe cutter. This causes the end of the copper pipe to bulge or crush, which makes it difficult to fit things together. Finger tighten, spin a few times, and repeat until the pipe pops off. Propane works fine for soldering, but higher heats are more desirable, so butane is superior. It takes a little longer for propane to heat the joint up -...

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    Key points - for a proper solder joint, the heat that melts the solder should come from the piping and fittings themselves. Don't apply heat directly to solder; if you remove flame from the joint, then touch it with solder, the solder should immediately turn liquid and flow into the joint, almost seeming to disappear. Keep the flame on a nearby part of the fitting or pipe so that the joint doesn't cool down too much, however. Do not over tighten the pipe cutter. This causes the end of the copper pipe to bulge or crush, which makes it difficult to fit things together. Finger tighten, spin a few times, and repeat until the pipe pops off. Propane works fine for soldering, but higher heats are more desirable, so butane is superior. It takes a little longer for propane to heat the joint up - copper is an excellent conductor of heat. Using a higher heat like butane makes the job go quicker. Be careful with MAP/Pro, or propane+oxygen rigs. They create much more heat, and it's possible to burn up the pipe on the highest settings. However, getting a MAP/Pro or dual gas rig (oxy+propane, oxy+butane, oxy+acetylene) will give you the ability to get into brazing and welding. Don't try to solder copper pipe while water is in it. You have to remove the water; it will cool the pipe down and prevent a proper solder joint. It can also cause steam jets which will blow out the solder and/or burn yo. Speaking of heat, you'll often see plumbers wipe down a freshly soldered joint with a moist rag. This is to cool the joint and remove some of that heat. It's also to clean the burned flux off. Do not, as I once stupidly did, use a soaking wet rag of ice cold water. When metal cools too rapidly, it hardens. Hardened metal is brittle. I've actually had cracks form in the thin walls of copper pipe because I soldered up a fixture then dunked it into water.

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