The GR150 is a normally open switch that closes when
properly placed near a magnetic source.
It consists of two magnetic members hermetically sealed in a glass
capsule, switching takes place in an inert environment. The small size and high
magnetic sensitivity makes the GR150 ideal for use in hearing aids, heart
pacemakers, pill cams, cell phones and similar electronic devices. Hearing aids use the switch to automatically
switch the hearing aid to a mode (T-coil) that gives better performance when
the end customer is using a telephone (which has a low-grade ceramic magnet
located in the handset). The smaller
size of the GR150 allows engineers more flexibility in the mechanical design of
miniature electronic devices. The availability of very tight ampere turn (AT)
ranges allow the design engineer better control of the magnetic variables in
his design. The magnetic sensitivity of
reed switches is measured in Ampere Turns (AT) in a specified test coil. Unlike
some other magnetic sensors which have a power drain while in their off state,
the GR150 consumes no power in the off state. The GR150 is just 3.7 mm in
length - the next largest magnetic reed switch available is approximately 10
percent longer. Designs incorporating
subminiature reed switches benefit substantially from a 10 percent reduction in
switch body length. Typical subminiature
magnetic reed switches have a substantial spread in ampere turns (AT). As produced subminiature reed switches
normally have a sensitivity range of 2 to 30AT.
The unique GR150 manufacturing process is capable of an 80% process
yield in a narrow 2AT band. This would
mean that our manufacturing process is capable of giving us an 80 percent yield
in an AT range of 3 / 4AT.
What makes this movie stand out from the typical high school sports story is that the teenagers are undocumented immigrants, and the big game is a NASA-sponsored marine robotics competition. Like many other Hollywood movies, however, Spare Parts only tells part of the story. What the film shows -- and doesn’t show -- raises important issues affecting STEM education in the US.
Instead of sifting through huge amounts of technical data looking for answers to assembly problems, engineers can now benefit from 3M's new initiative -- 3M Assembly Solutions. The company has organized its wealth of adhesive and tape solutions into six typical application areas, making it easier to find the best products to solve their real-world assembly and bonding problems.
Load dump occurs when a discharged battery is disconnected while the alternator is generating current and other loads remain on the alternator circuit. If left alone, the electrical spikes and transients will be transmitted along the power line, leading to malfunctions in individual electronics/sensors or permanent damage to the vehicle’s electronic system. Bottom line: An uncontrolled load dump threatens the overall safety and reliability of the vehicle.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.