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LED Indicator For Temperature Logger Schematic Circuit Diagram

Enhancing Thermometer Measurement Card: Adding LED Indicator

For enhanced functionality, the measurement card for both indoor and outdoor thermometers can incorporate an additional LED indicator, as illustrated in the diagram. This LED serves as a tool to validate the software’s operation, ensuring its proper functioning.

Pulse Transmission via Background Program: Signal Transmission Process

Periodically, every fifteen seconds, a pulse is transmitted through the background program. TLOGGER to line PBO, facilitated by connector K6, extending outside the system. Notably, this line’s state is altered only when TLOGGER assesses whether a temperature measurement is in progress. If a measurement is ongoing, the line remains high for a duration determined by the computer’s processing speed. However, when no measurement is active, this interval significantly shortens, typically around 80 ms. Additionally, the line functions as an outward error signal, indicating software-related issues.

Error Signaling and Connection Setup: Addressing Software Errors

In instances where critical files like TTRANS.CFG or TLOGGER.CFG are missing, the file path is incorrect, or the disk is full, the line is modulated with pulses at a frequency of 10 Hz. The LED’s connection to K6 is established via a brief flat cable, as depicted in the diagram. It’s important to note that the computer supplies the necessary power to drive the LED, ensuring seamless operation of the indicator.

LED indicator for temperature logger Schematic diagram

Defining Power: Work Rate and Measurement

Power can be defined as the rate at which work is done, indicating the work accomplished within a specific timeframe. In the International System of Units (SI), power is quantified in watts (W), equivalent to joules per second (J/s). In certain contexts, such as motor vehicles, power might be expressed in horsepower (hp), roughly equal to 745.7 watts. When a body performs work at the rate of 1 joule per second, its power is denoted as 1 watt.

Various Facets of Power: Influence and Authority

Beyond the physical context, power also signifies the ability to influence or exert control over others. This concept manifests in different forms, such as the strength required to run a distance or the authority wielded by a local government to levy taxes. In essence, power represents the capacity to instigate change and shape outcomes. Having power makes it easier to modify, reform, challenge existing rules, and bring about significant transformations. Without power, achieving change is possible but demands extensive struggle and effort, even for minimal alterations.

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