Pic: switcpiuhed range multimeter
the following is from
http://www.doctronics.co.uk/meter.htm

calculating voltage
As the resistance is reduced, current increases. Calculate the current expected in each case using the formula:
I=V/R
Small variations, up to ±5%, can be attributed to the tolerance of the resistors.

Multimeter
The central knob has lots of positions and you must choose which one is appropriate for the measurement you want to make. If the meter is switched to 20 V DC, for example, then 20 V is the maximum voltage which can be measured, This is sometimes called 20 V fsd, where fsd is short for full scale deflection.

For circuits with power supplies of up to 20 V, which includes all the circuits you are likely to build, the 20 V DC voltage range is the most useful. DC ranges are indicated by V= on the meter. Sometimes, you will want to measure smaller voltages, and in this case, the 2 V or 200 mV ranges are used.

What does DC mean? DC means direct current. In any circuit which operates from a steady voltage source, such as a battery, current flow is always in the same direction. Every constructional project descirbed in Design Electronics works in this way.

picture:rail and mitersaw

This is advanced planning for my internship year as an industrial arts teacher candidate

In particular I am focusing heavily on scripting the first 2 days of the class; and intro to the salvage workshop-wood. I am also going to try and write as many lesson plans as I can and prepare as much of the stock as I can. I am currently building a "version 1" of my shop model in my garage. from here I will take the lessons learned and the process itself (and maybe even parts of my shop) to a public school in Sunnyvale or Cupertino.

In hard times, humans have persevered. Plumbob is a part of the wave of sustainability moving all over the world right now. Plumbob is taking aim at the inefficiencies of how we build our living, working, and learning structures by re-discovering passive solar principles and re-aligning community to live by the Sun as an energy foundation. Our society is hanging on the question; "What will we leave the next generation?"

Plumbob's Industrial Arts vocational model meets the needs of public school districts to offer Career and Technical skills based training. Plumbob aligns Industry with Education; the model builds capacity in school shops, trains industry professionals to work with students and schools, and is an open collaborative platform for business and education to work together.

The Industrial Arts combines one's unique understanding of the built environment with the practical skills to design and build things.

I am in the initial stages of developing a reconstruction effort at Planet Granite in Sunnyvale. Planet Granite is a rock climbing gym and they are removing a whole section of their outdoor climbing area and I am attempting to save some of the structural steel to use in an educational project. This is the homepage for this project, and will closely link to the educational component on Plumbob.org/Education.