Adding a solar panel to a RV can provide convenient daily battery maintenance and can extend power available while camping away from civilization.
jhottell
The local policy does not permit you to logon interactively
I experienced this error on a XPMode Microsoft Virtual PC machine after joining it to a domain and trying …
Read moreThe local policy does not permit you to logon interactively
DIY Peltier Candle Powered Electric Generator
Here I show how to create some usable electricity from a candle and a peltier cooler.
Materials include a candle, metal plate, four nuts, four long bolts, a peltier cooler, heat sink, and thermal grease.
What is a Photo Resistor
Photocells, (LDR) Light Dependent Resistor, Photo Resistor, Cadium Sulfide Cell (CdS), all of these names refer to the same thing. Photo Cells are semiconductors that are also resistors that change their resistance depending on the amount of light.
How to Install a Fresh Copy of Windows 7
Installing a fresh copy of Windows 7 on a computer is fairly easy, here I show the steps. If you want to upgrade your computer from windows XP or upgrade from a 32 bit to 64 bit you will need to do the fresh install just as this video shows.
AC vs DC Explained and How to Use an Oscilloscope
I decided it would be easier to explain AC and DC current if the user already knew how to use and oscilloscope. Explaining how to use an oscilloscope is easy if the user already knows what DC and AC current is. I think the video worked out as a fast paced tutorial for both subjects.
Repairing broken LCD screen backlight with LEDs
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 the LCD is very usable.
DIY Function (Signal) Generator
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 signal generator.
DIY IO Simulator (AI, AO, DO)
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.
What is a LED
An LED or Light Emitting Diode is a low power semiconductor light source used in lots of electronic devices. LEDs are closeley related to transistors and regular diodes.
GLCD Screen Displaying Live Arduino Analogs
I used a ST7565 GLCD (Graphic Liquid Cristal Display) screen to display the live analog readings from an Arduino. Here …
Dawn to Dusk Chicken Door Project
There are many advantages of having an automatic chicken coop door. The door will automatically close at night when the …
Unboxing the LM3S811 Evaluation Kit
Here I show what’s included and how to work the LM3s811 kit from Texas Instruments. You can acquire this kit …
How to Replace a Desktop Hard Drive
Replacing a desktop hard drive is not as hard as some may think. Here are some instructions.
DIY RFID Keyless Entry System
A few years ago I built a keyless entry system for my shop using a keypad, now it is time …
Arduino Electronic Speed Control ESC 2 of 2
Here is my second ESC or Electronic Speed Control that I built with an Arduino Duemilanove. You can’t just hook …
Arduino Electronic Speed Control ESC 1 of 2
Here is my first ESC or Electronic Speed Control that I built with an Arduino Duemilanove. If you don’t already …
Zune Software Review, ITunes Alternative
The Zune software client is a free media player from Microsoft. Zune is a market place alternative to ITunes with …