Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. Do simple calculations with your own math box. Ralph Smith The ...

When more than two resistors are connected in parallel the equation becomes:\(\frac{1}{R}=\frac{1}{R}_{1}+\frac{1}{R}_{2}+\frac{1}{R}_{3}\) The supply voltage is a measure of the energy supplied to ...

I recently contributed a design for a simple platinum resistance temperature detector (PRTD) resistance two-wire 4-20mA transmitter circuit illustrated in Figure 1. Figure 1 A two-wire, 4 to 20 mA ...

In his monthly newsletter, EMC consultant Doug Smith reports on an online wire calculator. It'sa Javascript application where you enter the wire gauge and temperature. The script calculates wire ...

Intuition tells us that a wire without defects should have zero resistance. But in the real world all conductors, however perfect, have some resistance. A new study confirms that electrical contacts ...

Download this article in PDF format. Proper wiring and probing/contacting are critical to making successful measurements. When testing cells or batteries, using good engineering practices is important ...

Figure 1: Electronic transport in cleaved-edge overgrowth quantum wires. a, Geometry of the CEO device. To create the more complex contacting geometry for a four-probe measurement, we use a pattern of ...