Todd Harrison hacked a pool heater out of his backyard barbecue grill:
Normally you can't swim in our pool until June because it's just to cold (68F - 75F).
I like swimming in about 80F to 85F myself, if it's sunny and warm out. I created a
prototype heater coil that seemed to work for its size. I then create a large heater
coil out of 180 feet of copper tubing that connects to my pool pump using a garden hose
and fits inside the grill. The hose runs from the pump through the grill heater coils
and then into the pool. I heated my pool from 68F to 89.4F in 48 hours using 3.5 tanks
The device heats water 30 to 35 degrees at 3 to 4 gallons per minute flow. I find I get a
7 degree increase in my 8000 gallon pool for each 5 gallon tank of propane. Each tank
will burn for about 13 to 15 hours on high. A pool cover is required...
The coils come out and the grill converts back to cooking in less then 3 minutes which includes cool-down and draining the coils.
This gadget does exactly as promised: it looks like a thumbdrive (sort of) and fries the circuitry of any computer it’s plugged into. It’s made from camera flash parts, is charged with a standard AA battery, and delivers a 300V zap of DC destruction to the port for all your USB-murdering needs. Note that this […]
The Cobham catalog, exposed by The Intercept, features countless pages of surveillance gadgets sold to U.S. police to spy on American citizens: tiny black boxes with a big interest in you. In the creepily bland feature lists and nerdy product names is a whisper of a dark future; perhaps darker than anyone can imagine.
This image depicts the most commonly-found stylesheet colors on the web’s top sites—Paul Hebert did an amazing amount of analysis and this is just one of the intriguing visualizations he came up with. Most of these are obvious staples, especially HTML red and blue, though it’s interesting how far the blue “cluster” is from the […]
The Boing Boing Store’s Gift Guide is full of ideas for pretty much anyone in your life like hipster ice cub trays, Xbox controllers, Halo Boards, and even diamond necklaces. As always, all products in the Boing Boing Store come at great discounts, too. Shop by price bucket starting at under $20. Under $20:Bloxx Jumbo Ice Trays […]
Unlike traditional lighters, the SaberLight features an electronic plasma beam that’s both rechargeable and butane-free. This sleek lighter is even approved by TSA, so you’ll never be stuck buying lighters you’ll just have to throw away partially used. For some people, like me, this is a pretty big game-changer. The SaberLight’s beam is actually both hotter and cleaner […]
Holiday shopping is in full swing, and the Striiv Touch is one of the best gift ideas I’ve landed on. Its simple design works for females and males, and its wide range of features makes it suitable for even the non-fitness enthusiasts in your life.Unlike traditional fitness trackers, the Striiv Touch also acts as a smartwatch. It […]