A pair of alternating flashing LEDs makes an excellent visual alarm. One of the LEDs remains illuminated, so there's little chance the alarm will go undetected, even by a casual glance. Several ...

This circuit is used to simulate the police car lights by alternating flashing strobes seen on British police cars. The IC1a forms a square wave oscillator having adjustable frequency with VR1 to give ...

The Model 1178 Safety Light combines a full-size flashlight and a flood/flashing safety light in an all LED compact light-weight package. Two body mounted push buttons control the lighting functions.

GRAND RAPIDS, Mich. (WOOD) — The Michigan Department of Transportation is partnering with Michigan State Police and the city of Grand Rapids to use technology to prevent tragedy and cut down deadly ...

If you purchase an independently reviewed product or service through a link on our website, Rolling Stone may receive an affiliate commission. If you’ve got a car, or any vehicle really, an emergency ...