Common-cathode-led-display

Description: A Teledyne TSC7135 digital voltmeter (DVM) chip is utilized to control a multiplexed 5-digit display. To facilitate common cathode drive, a CD4513BE CMOS integrated circuit (IC) functions as a segment driver, with selection controlled by pins 17-20 of the DVM chip. The transistors employed in the circuit can be any compatible NPN type, such as the 2N3904.

The schematic features a Teledyne TSC7135 DVM chip at its core, which is responsible for processing the input voltage and displaying the corresponding numerical value on a 5-digit multiplexed display. This configuration allows for efficient use of display segments, as the DVM chip activates each digit in sequence, reducing the power consumption and enhancing the display's readability.

The CD4513BE CMOS IC serves as a segment driver for the common cathode display. This IC is designed to interface directly with the DVM chip, receiving control signals from pins 17-20. These pins dictate which segments of the display are activated to represent the numerical output from the DVM. The use of a common cathode configuration allows for a simplified driving scheme, where the segments are grounded through the driver IC, enabling easy control of the display.

In terms of transistor selection, any suitable NPN transistor can be utilized, with the 2N3904 being a common choice due to its availability and performance characteristics. These transistors are used to switch the segments on and off, responding to the signals provided by the CD4513BE. Their role is crucial in ensuring that the display operates reliably and accurately reflects the DVM's readings.

Overall, this circuit design effectively integrates the Teledyne TSC7135 DVM chip with a multiplexed display and segment driver, providing a clear and efficient method for displaying voltage measurements while maintaining low power consumption.Here, a Teledyne TSC7135 DVM chip is used to drive a multiplexed 5-digit display. A CD4513BE CMOS IC, for common cathode drive, is used as a segment driver selected by pins 17-20 of the DVM chip. The transistors can be any suitable npn type such as 2N3904, etc.