The useless machine is a simple box with a switch and motor, when you turn on the switch the lid opens and the arm swings out and turns off the machine and then retracts. It is so simple but brings a smile to the face of everyone that tries! The Useless Machine was not created [...]
As it is getting cold again and my chickens made it through the summer just fine, it is time to revisit and revitalize my automatic chicken door.
The older model was a large door that slid on a track that would get leaves, snow, and ice messing the whole thing up. Also the mecanisim that [...]
Adding a solar panel to a RV can provide convenient daily battery maintenance and can extend power available while camping away from civilization.
Solar Kits or having one installed can be very costly. As I have not found any help regarding do it [...]
LCD screen backlights can often go out requiring a new inverter or CFL lamp. Replacement parts can be hard to find or costly. Here I use a six dollar LED strip to replace the CFL backlight with success! If you look hard you can see points of light where the LEDs are but all together [...]
Here is my homemade function generator that can produce a square, triangle, and sign wave. This is all done with a few bucks worth of parts. The heart of the function generator is a LM324N quad OpAmp. I got the schematic off of a site where they were also selling kits to build the [...]
I needed to create an IO simulator for testing a PLC (Programmable Logic Controller). I pieced together a useful tool to do the trick of simulating analog and digital input and output that was expected from sensors in the real world.
This simulator can be used with any electronic device that [...]
There are many advantages of having an automatic chicken coop door. The door will automatically close at night when the chickens are inside and open in the morning. Not only will they stay warm and cozy, critters like coons and skunks will have a much harder time getting to them. The ultimate luxury to me [...]
Here is my first ESC or Electronic Speed Control that I built with an Arduino Duemilanove. If you don’t already know, the best motors you can scavenge out ov CDROM drives or old hard drives are Brushless DC motors that you can’t just hook DC up to and make [...]
I searched for days trying to find a commercial sound localization sensor or info on how to build one. Sound localization is what the human ear does when it determines that a sound is coming from the left or right. After talking to some gentlemen over at the Arduino forums I realized that [...]
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