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  • TC7136/TC9400 Digital Readout Frequency Meter
    Two low-cost integrated circuits can be combined to create a simple digital frequency meter. The combination of a frequency-to-voltage converter (FVC) and a dual-slope, analog-to-digital display converter (ADC) makes a small 2-chip frequency meter that can be run from one 9-volt battery.
  • Advantages of Digital Panel Meters
    Variables in processes like temperature, pressure, vibration, frequency, voltage, and current must constantly be monitored. Measuring these variables (and others) requires process control instrumentation such as panel meters, bargraphs and controllers. These instruments are available in both analog
  • Environmental Noise Control Trends in Instrumentation
    out by a Sound Level Meter - or "SLM". Sound Level Meter technology has evolved quite a bit over the years. In the days before digital technology was common-place, sound level meters were based on analog circuitry. A microphone produces a signal that is rectified. The rectified signal is filtered
  • PKE System Design Using the PIC16F639
    and 2. Input sensitivity of the transponder, transponder units. The base unit inside the vehicle 3. Antenna directionality, and transmits a Low-Frequency (LF) command that searches for a transponder in the field. Once located, 4. Battery life of the transponder. the transponder in the vehicle owner's

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