The 1B32 is a compact and highly reliable pressure sensor, making it an excellent choice for portable sensing applications. Because the 1B32 requires a negative power supply, a practical circuit is provided to generate this voltage. In this design, a CMOS TLC555 timer is used, powered by the positive terminal of a +12V battery. The timer typically consumes about 360μA of current. Its output is a square wave signal, which is then rectified and filtered to produce a -9V power supply. This ensures that the excitation voltage applied to the 1B32 remains at or below +9V, allowing for proper adjustment and stable operation.
When designing systems with the 1B32, it's important to consider the power requirements and ensure that all components are compatible. The use of a simple 555 timer-based circuit offers a cost-effective and reliable way to generate the necessary negative voltage. This approach is especially useful in low-power environments where space and efficiency are critical. By carefully selecting component values and ensuring proper filtering, the stability and performance of the system can be significantly improved. Whether you're working on a small-scale project or a larger industrial application, the 1B32 provides a solid foundation for accurate and consistent pressure measurements.
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