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Bill Schweber

PIGAs can indeed fly – and are still the best, Part 3: History and future

March 31, 2022 By Bill Schweber

The PIGA is the oldest accelerometer and widely used in rocketry and guidance, and still the best – but MEMS-based devices are getting closer. The previous parts looked at the principle and operation of the PIGA. This part looks briefly at its history and refinement and the MEMS-based versions of the PIGA being developed and […]

Filed Under: Featured, Frequently Asked Question (FAQ), Gyroscope, Inertial Measurement Unit (IMU), Inertial Measurement Unit (IMU), Other Tagged With: FAQ

PIGAs can indeed fly – and are still the best, Part 2: Operation

March 30, 2022 By Bill Schweber

The PIGA is the oldest accelerometer and widely used in rocketry and guidance, and still the best – but MEMS-based devices are getting closer. At the core of each single-axis PIGA is a gyroscope. The performance of this gyro – which is unrelated to the orientation gyros – plays a large role in determining the […]

Filed Under: Accelerometer, Featured, Frequently Asked Question (FAQ), Gyroscope, Inertial Measurement Unit (IMU) Tagged With: FAQ

PIGAs can indeed fly – and are still the best, Part 1: Frame of reference

March 29, 2022 By Bill Schweber

PIGA

The PIGA is the oldest accelerometer, is widely used in rocketry and guidance, and is still the best – but MEMS-based devices are getting closer. When you see an inexpensive drone, a more sophisticated one, an unmanned aircraft, a standard piloted aircraft, guided or intercontinental ballistic missile ICBM), an underwater drone or submarine, or a […]

Filed Under: Accelerometer, Featured, Frequently Asked Question (FAQ), Gyroscope, Inertial Measurement Unit (IMU), Inertial Measurement Unit (IMU) Tagged With: FAQ

What are the varieties of electromechanical on/off switches?

December 23, 2021 By Bill Schweber

Despite wide use of “soft” on/off switching, the traditional electromechanical switch is still often required or preferred and is available in countless versions. Let’s look at some available switch styles. 1) The knife switch   It doesn’t get simpler than the knife switch. The first and simplest switch is the knife switch (Figure 1). This style […]

Filed Under: Featured, Frequently Asked Question (FAQ), Switches Tagged With: FAQ

What are the parameters of electromechanical of/off switches?

December 22, 2021 By Bill Schweber

on off switches

Despite wide use of “soft” on/off switching, the traditional electromechanical switch is still often required or preferred and is available in countless versions. As with all components, there are some top-tier parameters as well as many secondary ones, and some of those secondary ones may be very important in a specific application. As expected, the […]

Filed Under: Featured, Frequently Asked Question (FAQ), Switches Tagged With: FAQ

What are the symbols for electromechanical on/off switches?

December 21, 2021 By Bill Schweber

on off switches

Despite wide use of “soft” on/off switching, the traditional electromechanical switch is still often required or preferred and is available in countless versions. Switches are represented by their schematic diagram symbols, which correspond to the number and arrangement of their contacts. Schematic symbols tell part of the story In an electromechanical hardwired on/off switch, the […]

Filed Under: Featured, Frequently Asked Question (FAQ), Switches Tagged With: FAQ

What is the role of electromechanical on/off switches?

December 20, 2021 By Bill Schweber

toggle switches

Despite wide use of “soft” on/off switching, the traditional electromechanical switch is still often required or preferred and is available in countless versions. Switches are an integral, very necessary part of most electronic products. They have two broad roles: As power switches which, as their name indicates, cut the flow of power from the source, […]

Filed Under: Featured, Frequently Asked Question (FAQ), Switches Tagged With: FAQ

The automotive Tire Pressure Monitoring System, Part 4: Issues

October 8, 2021 By Bill Schweber

Sensor-based monitoring systems for tire pressure can warn of potential problems, but there’s much more to the story than just a pressure-measurement system. The TPMS adds a highly specific safety-related feature to cars. However, as with many presumably good ideas, the “devil is in the details”, and that’s especially true for the TPMS. There are […]

Filed Under: Featured, Frequently Asked Question (FAQ), Pressure Sensor Tagged With: FAQ

The automotive Tire Pressure Monitoring System, Part 3: Implementation

October 7, 2021 By Bill Schweber

TPMS

Sensor-based monitoring systems for tire pressure can warn of potential problems, but there’s much more to the story than just a pressure-measurement system. Once the decision was made to use the direct measurement technique, IC vendors developed the needed components and equally important packaging. A TMPS requires a significant amount of analog, digital, and RF […]

Filed Under: Featured, Frequently Asked Question (FAQ), Pressure Sensor Tagged With: FAQ

The automotive Tire Pressure Monitoring System, Part 2: Perspectives

October 6, 2021 By Bill Schweber

Tire Pressure Monitoring System

Sensor-based monitoring systems for tire pressure can warn of potential problems, but there’s much more to the story than just a pressure-measurement system. During the comments phase before the formal safety mandate was published per the legislative direction, the automotive-related communities had differing views on the need or wisdom of the electronic TPMS: The auto […]

Filed Under: Featured, Frequently Asked Question (FAQ), Pressure Sensor Tagged With: FAQ

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