Control Circuit Design of 7-Segment Common Cathode LED Display GPS Receiver Clock and Arduino Program

Authors

  • Seiichi Nakamori Kagoshima University

Keywords:

7-segment LED display, Arduino, CNC router, Photo Relay, GPS Receiver Clock

Abstract

This paper newly designs the control circuit of the 7-segment common cathode LED display global positioning system (GPS) receiver clock and presents an Arduino sample program. The computer numerical control (CNC) router engraves the copper foil substrate to manufacture the printed wiring boards (PWBs) of the 7-segment common cathode LED display and its control circuits according to each G-code produced by the printed circuit board (PCB) design software Target3001! For each segment of the 7-segment common cathode LED display circuit, the two LEDs are connected in series. From an experiment, the two N-Channel metal-oxide-semiconductor field-effect transistors (MOSFETs) EKI04047, one at the high side and the other at the low side around the two LEDs, do not light on the two LEDs connected in series at all, unlike the case of the two LEDs connected in parallel. For this reason, upon lighting on/off the LEDs, this paper, newly, proposes the switching on/off control circuit with the optical relays at the high and low sides around the two LEDs connected in series.

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Author Biography

Seiichi Nakamori, Kagoshima University

Department of Technology, Faculty of Education, Kagoshima University, Kagoshima, Japan

References

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Published

2020-04-30

How to Cite

Seiichi Nakamori. (2020). Control Circuit Design of 7-Segment Common Cathode LED Display GPS Receiver Clock and Arduino Program. Computer Reviews Journal, 6, 34-46. Retrieved from https://purkh.com/index.php/tocomp/article/view/718

Issue

Section

Research Articles