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| sensor:mq [2026/04/21 20:47] – created - external edit 127.0.0.1 | sensor:mq [2026/05/08 22:46] (current) – vamsan | ||
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| + | ===== 5V/3.3V level shifting ===== | ||
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| + | To step down 5 V to 3.3 V for signal level shifting, use a voltage divider with a ratio of about 1:2, such as 1 kΩ and 2 kΩ resistors. Ensure safety by adding a voltage clamp IC (LD1117V33) to limit the output voltage. | ||
| ===== Arduino ===== | ===== Arduino ===== | ||