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LilyGO / TTGO-T8-ESP32

esp32-i2s-sdcard-wav-player
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TTGO v1.7.1 - pin 3v3 actually 3v8 #23

Open RalphBacon opened 2 years ago

RalphBacon commented 2 years ago

The 3v3 pin on my TTGO v1.7.1 is measured as 3v854 on two multimeters. This voltage actually goes to the ESP32 chip, so I'm wondering two things:

  1. Why is the voltage so high?
  2. How does the ESP32 D0WDQ6 chip survive?

The voltage regulator on the board has a mark LPS A18A2 on top, which I can't find on the internet. According to the TTGO schematic this should be a SY8008B LDO.

Do I have a fake TTGO or is something else going on? Specifically, should I replace that voltage regulator (SOT223-5 format) with a known device that gives out 3v3?

The board is working just fine, with WiFi and ESP32-NOW all enabled, but I am wary about using this device "in the field".

koradeh commented 1 month ago

Please Check your GND is really GND ?!