Snap-on’s Digital Display Circuit Tester (EECT400) is designed to detect voltage, ground and circuit integrity. An LCD display provides the circuit’s voltage value, while a backlit LED ...

The ICON Digital Circuit Tester is a new test light that is available at Harbor Freight. Unlike an old-school device, this light provides a bright red (positive) or green (negative) LED numeric ...

Or voltage variation can occur if an LED in one string is shorted. In Fig. 2, the power-limit circuit is formed by R11, R12, R13, R14, Q11 and Q12.

Inspired by printed circuit boards, the building block of all electronics, a Dutch designer has created an LED-based light installation that draws upon the familiar etching pattern inside most ...

Midwest Circuits' LED street-light technology shines Published: Jun. 12, 2008, 9:00 a.m. By Sarah A. Rigg Patel ...