Hi,
I have a circuit with a 3.3V regulator in it. Other esp32 boards work fine, but for whatever reason I cannot power my Lora v2 from 3.3v. What I am doing wrong? it happens no matter which of the two 3.3 pins i am using. It doesnt even work from a lab power supply, so does not depend on my regulator circiut.
Can heltec lora v2 boards run from 3.3V at all?
Help is much appreciated.
| Electrical characteristics | condition | Minimum | Typical | Maximum | |
|---|---|---|---|---|---|
| Power Supply | USB powered（≥500mA） | 4.7V | 5V | 6V | |
| Lithium powered（≥250mA） | 3.3V | 3.7V | 4.2V | ||
| 3.3V（pin）powered（≥150mA） | 2.7V | 3.3V | 3.5V | ||
| 5V（pin）powered（≥500mA） | 4.7V | 5V | 6V |
According to this I should be fine. The regulator is deliverung smooth 3.3. To add: a “Lora Stick” runs smooth in the circuit, but both LORA V2 don’t accept voltage at their 3.3 pin 