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I think the answer to your question can best be summed up by one word: "Kinda". The best reasoning is the NodeMCU Lua documentation which states: Time keeping on the ESP8266 is technically quite challenging. Despite being named RTC, the RTC is not really a Real Time Clock in the normal sense of the word. While it does keep a counter ticking while ...


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As is described in this post from the arduino forum, There is a MOSFET switch in series with the USB connector +5V input line. If the battery booster 5V output is connected to the USB input jack, then it will automatically power the UNO whenever power is disconnected from the barrel jack, and will be automatically disconnected whenever at least 7.0V is ...


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You can use a branded 5 V charger made for cars. You can directly connect this to 5 V pin of the Arduino. By doing this: you are protecting the Arduino from the noise as well as high voltage spikes coming from the car 12 V supply protecting yourself and others coming in contact with the Arduino or the sensors connected to the Arduino. You can also ...


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The TP4056 is a battery charger, not a voltage regulator. It cannot be used to supply power to a device like an Arduino. It is designed for charging the Lithium Ion battery from a 5V (e.g., USB) source. By trying to use it as a power supply you're asking for trouble. It thinks it's trying to charge a battery (from a 3.7V nominal source) and will be doing ...


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Please have a look at the schematics: https://cdn-learn.adafruit.com/assets/assets/000/010/774/original/adafruit_products_trinket5.png?1378223478 The USB connector uses a resistor (1500 Ohms) against the 5V net and a 3.6 Volt Z-Diode on it's (D-)-Pin. In addition to the current that is drawn by the microcontroller, this part of the circuit draws some extra ...


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