Low-cost-frequency-counter
This counter features a four-digit display that can be switched to display frequencies ranging from 1 to 40 MHz, with a resolution of 100 Hz. The MM74C926 CMOS IC serves as the four-digit decimal counter, which can latch a specified count and subsequently drive a 7-segment, common-cathode multiplexed (MUX) display. The operation of the counter is illustrated in the block diagram and schematic. A crystal-controlled timer, consisting of U1 through U3, generates a 5-Hz square wave utilized for frequency timing.
The described counter circuit utilizes the MM74C926 CMOS integrated circuit, which is specifically designed for counting applications. The IC is capable of handling four digits, allowing it to display counts from 0000 to 9999. The range switch enables the user to select between different frequency ranges, providing versatility in applications that require frequency measurement.
The counter operates by latching the frequency count, which is then displayed on a 7-segment MUX display. This type of display is beneficial for minimizing the number of required connections, as it allows multiple digits to share the same segments while using a multiplexing technique to illuminate the appropriate segments for each digit in rapid succession.
The crystal-controlled timer circuit, comprising U1 through U3, is essential for generating a stable timing reference. This ensures that the frequency measurements are accurate and reliable. The output of the timer produces a 5-Hz square wave, which serves as the timing signal for the counting process. This timing signal is critical in determining how often the counter increments based on the input frequency being measured.
In summary, this four-digit frequency counter design, based on the MM74C926 IC, provides a robust solution for measuring frequencies up to 40 MHz with a resolution of 100 Hz. The combination of a crystal-controlled timing circuit and a multiplexed display makes it an efficient and effective tool for various electronic measurement applications.This counter uses a four-digit display, but with a flip of the range switch, it can display frequencies from 1 to 40 MHz, with a resolution of 100Hz. The MM74C926 CMOS IC contains a four-digit decimal counter that can latch a given count and then use this information to drive a 7 -segment, common-cathode multiplexed (MUX) display.
The block diagram and schematic show the operation of the counter. Crystal-controlled timer U1 through U3 produces a 5-Hz square wave used for timing the frequency. 🔗 External reference
The described counter circuit utilizes the MM74C926 CMOS integrated circuit, which is specifically designed for counting applications. The IC is capable of handling four digits, allowing it to display counts from 0000 to 9999. The range switch enables the user to select between different frequency ranges, providing versatility in applications that require frequency measurement.
The counter operates by latching the frequency count, which is then displayed on a 7-segment MUX display. This type of display is beneficial for minimizing the number of required connections, as it allows multiple digits to share the same segments while using a multiplexing technique to illuminate the appropriate segments for each digit in rapid succession.
The crystal-controlled timer circuit, comprising U1 through U3, is essential for generating a stable timing reference. This ensures that the frequency measurements are accurate and reliable. The output of the timer produces a 5-Hz square wave, which serves as the timing signal for the counting process. This timing signal is critical in determining how often the counter increments based on the input frequency being measured.
In summary, this four-digit frequency counter design, based on the MM74C926 IC, provides a robust solution for measuring frequencies up to 40 MHz with a resolution of 100 Hz. The combination of a crystal-controlled timing circuit and a multiplexed display makes it an efficient and effective tool for various electronic measurement applications.This counter uses a four-digit display, but with a flip of the range switch, it can display frequencies from 1 to 40 MHz, with a resolution of 100Hz. The MM74C926 CMOS IC contains a four-digit decimal counter that can latch a given count and then use this information to drive a 7 -segment, common-cathode multiplexed (MUX) display.
The block diagram and schematic show the operation of the counter. Crystal-controlled timer U1 through U3 produces a 5-Hz square wave used for timing the frequency. 🔗 External reference
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This counter utilizes a four-digit display, which can show frequencies ranging from 1 to 40 MHz when the range switch is activated, achieving a resolution of 100 Hz. The MM74C926 CMOS integrated circuit features a four-digit decimal counter that...