Learn more about the history of OrbitÂ® chewing gum and the introduction of each of the OrbitÂ® gum flavors and OrbitÂ® gum facts. 1  1944 The history of OrbitÂ® Gum dates back to World War II. 2  Since they were no longer available on the civilian market, Wrigley began production of a new gum called OrbitÂ®.
Passive POE usually refers to any device using POE to power that is not 802.3af/at. This includes things like cameras and radio antennas that run on 24V POE. Passive POE does not do a hand shake so it is extremely important to know what POE voltage your device requires before plugging in the CAT5 cable and powering it up. If you connect the wrong voltage you can easily burn up your device.
Sometimes these types of heat sinks are referred to as an HSF, which is short for heat sink and fan. Passive heat sinks are 100% reliable, as they have no mechanical components. Passive heat sinks are made of an aluminum-finned radiator that dissipates heat through convection. For passive heat sinks to work to their full capacity, there should be a steady airflow moving across the fins. The above picture is an example of a heat sink that is both active and passive.