Simple Water Heater Emergency Heat

Ensure there are no kinks

This year’s Halloween nor’easter has started me thinking about how to heat my apartment if the power goes out for an extended period of time. If the water and gas are still on, one possibility is to make a simple hydronic heating system using the water heater. The basic idea is to hook a hose [...]

Replacing My Sacrificial Anode

Extracting the spent anode

It is time, yet again, to replace my water heater’s sacrificial anode. My purpose here is to bring to your awareness the importance of changing the anode to substantially prolong the life of your water heater. This is not a “how to” and if you are unsure of your skills you should call a professional. [...]

Arduino AVR High-Voltage Serial Programmer

Diagram

This Arduino sketch is useful for rescuing ATtiny microcontrollers rendered useless by incorrect fuse settings. It does this by putting the bricked tiny into high-voltage serial programming mode and writing the fuses to safe values.

Build an Arc Welder from Microwave Ovens: Part 4

Paul practicing his arc-welding

Paul decided before he used his homebrew arc-welder (not yet built) he would practice with a factory built arc-welder. He borrowed his grandfather’s arc-welder and tried it out today. He needed a suitable piece of scrap metal which he found in the middle of the road while driving home.

Make a Halloween Costume from a Microwave Oven

There is nothing quite like a happy microwave.

It was as simple as cutting a hole in the base of the microwave, bending back the metal, covering the edges with duct tape, and padding the interior with quilt batting. Stick two eyes and a mouth on the front to form a smiley face and you have one hot costume.

Build an Arc Welder from Microwave Ovens: Part 3

Paul practicing his arc-welding

Paul obtained his microwave ovens, wired the garage for 220 volts, and extracted the first transformer. In this segment he replaces the old secondary windings with new, thicker wire.

Build an Arc Welder from Microwave Ovens: Part 2

To power the arc welder Paul needs six transformers. At a cost of $5 for 33 microwaves, one transformer sets him back 15 cents. He dismantled his first microwave oven and extracted the transformer.