Frequency meter with 10Hz to 2MHz

The 7208 seven-metric system counter is utilized as a frequency meter. It features a latch and multiplexing function and incorporates a direct drive circuit along with a display driver circuit. The 7207 IC divides the output frequency of a 6.5536 MHz crystal oscillator by 2^12, resulting in a 1600 Hz square wave for calculator and display connection multiplexing. Following fractional frequency processing, it generates 0.1 s and 0.01 s measurement gating signals, subsequently selecting communication and reset command pulses and modifying ordered pulses. The RCA company’s 3130 operational amplifier is employed to optimize the input signal.

The 7208 counter operates in conjunction with the 7207 integrated circuit (IC) to facilitate precise frequency measurement and display functionality. The 7207 IC's division of the 6.5536 MHz crystal oscillator frequency is crucial as it allows for the generation of a stable 1600 Hz square wave. This square wave serves as a clock signal for the multiplexing of data to the display and calculator interface, ensuring accurate representation of the measured frequency.

The latch function within the 7208 counter allows for temporary storage of the output state, enabling the system to hold the last counted value even when the input signal is momentarily interrupted. This feature is particularly beneficial in applications where signal fluctuations are common, providing a reliable reading to the user.

Furthermore, the generation of 0.1 s and 0.01 s measurement gating signals is essential for time-based measurements in frequency applications. These gating signals define the intervals during which the counter is active, allowing for precise timing and measurement of the input frequency. The ability to select communication and reset command pulses enhances the versatility of the system, allowing for integration with other digital systems and enabling user-initiated resets.

The RCA 3130 operational amplifier plays a pivotal role in optimizing the input signal before it is processed by the counter. By amplifying the signal, it ensures that even weak input frequencies can be accurately measured, thus expanding the operational range and improving the overall performance of the frequency meter.

In summary, the 7208 seven-metric system counter, in conjunction with the 7207 IC and RCA 3130 operational amplifier, forms a sophisticated frequency measurement system that is capable of providing accurate and reliable frequency readings, suitable for various applications in electronics and instrumentation.7208 seven metric system counter is used for frequency meter, it has latch and multiplexing function, and contains direct drive circuit and display driver circuit. 7207IC is divided the output frequencyof6. 5536 MHz crystal oscillator by2 12which produces the 1600Hz square wave for calculator and display connection multiplexing.

After fractional fr equency, it produces 0. 1 s and 0. 01 s measurement gating signal and thenchooses communication and reset command pulse, modify ordered pulse. RCA company`s 3130 operational amplifier is used for optimize the input signal. 🔗 External reference