• on Miscellaneous Electronics
  • Published in issue 7/2012 on page 90
About the article

Economical 7-segment Display

Economical 7-segment Display

Current consumption is always an important consideration when designing battery-powered devices. This circuit shows how a seven-segment display can be driven by a microcontroller in a way ideally suited for such applications. Furthermore, we even economise on component count!
In a conventional circuit where a single digit is displayed each individual segment is provided with its own current-limiting resistor through which it can be continuously driven.

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