glossary:glossary_c
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glossary:glossary_c [2022/06/26 15:27] – [Charlieplexing] grovenor | glossary:glossary_c [2022/06/27 12:23] (current) – Removed scaling so GIF will animate. WhiteCF | ||
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This is a method of multiplexing a few I/O pins of a microcontroller to control a large number of LEDs. It uses I/O pins that can be 3 state, either source or sink current or be open circuit (switched as input). LEDs are wired in reversed pairs. The LEDs are driven in a multiplexed way, rapidly by software. Only 1 LED is lit at any given time. 3 pins can drive 6 LEDs, 4 pins drive 12 LEDs, 5 pins drive 20 LEDs... See the MERG Journal [[https:// | This is a method of multiplexing a few I/O pins of a microcontroller to control a large number of LEDs. It uses I/O pins that can be 3 state, either source or sink current or be open circuit (switched as input). LEDs are wired in reversed pairs. The LEDs are driven in a multiplexed way, rapidly by software. Only 1 LED is lit at any given time. 3 pins can drive 6 LEDs, 4 pins drive 12 LEDs, 5 pins drive 20 LEDs... See the MERG Journal [[https:// | ||
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===== Circuit ===== | ===== Circuit ===== |
glossary/glossary_c.txt · Last modified: 2022/06/27 12:23 by WhiteCF