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kakopappa/An external switch circuit:

Created October 2, 2019 03:03
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An external switch circuit:
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An external switch circuit:
An external switch circuit:
3.3V
--+--
|
+-+
| | 1K ~ 10K
+-+
|
+--> D2 (for ESP8266, ex: GPIO16 in case of ESP32)
|
| O
--+
| O
|
--+--
GND
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