What does 3V3 or 1V8 mean? - Electrical Engineering Stack …
Mar 14, 2012 · While reading a datasheet for an IC I came across the pin voltages being presented as 3V3 or 1V8. What does this representation stand for?
Converting universal AC to 3.3 V DC @ 0.1 A
Nov 18, 2025 · I would seriously consider plugging in one of those tiny USB chargers for mobile phones, like the HTC chargers, and an LDO to bring the voltage down to 3.3 Volts, if this is a …
Switching 3.3V with 3.3V signal - Electrical Engineering Stack …
Jul 12, 2024 · The ESP32C3 has a battery input and a regulated 3V3 output, and the DFPlayer takes 3.3V power, so that would seem to be a straightforward way to power the circuit.
MCU working at 3.3V and RS485 driver at 5V - how does this …
Apr 15, 2022 · I see no reason why this shouldn't work, at least for a "dirty solution". The inputs (driver input, driver/receiver enable) are recommended to be below 0.8V for a logic low and …
Powering Components with ESP32 - Electrical Engineering Stack …
Dec 22, 2021 · The 3V3 output is just the output of the LDO on your ESP32 module, you can use it to power your 3V3 sensors, like the TSOP that requires 3V3. You can use the RC filter …
How can I translate logic signals from 5 V to 3.3 V?
Sep 21, 2023 · I have a range of data signals and clock signals that I want to translate down from approximately 5 V to the 3.3 V range. Is there an IC available to perform this task? The various …
microcontroller - Stepping down automotive 12V to logic 3.3V ...
Nov 13, 2022 · I'm building a kind of CAN bus IO module with an ESP32. This module will control the taillights of my electric conversion project. What is a robust (reverse polarity protection, …
level shifting - Step up 3.3V to 5V for digital I/O - Electrical ...
I normally use an Arduino for my projects because it has 5V inputs and outputs and has 5V Vin so that makes life very easy when interfacing with 5V components. For this project I want to use a …
Is a 5 V or 3.3 V supply voltage better for a microcontroller based ...
May 22, 2025 · I am about to design a new microcontroller based project. I checked all components (few) and all can operate at 3.3 V or 5 V. The microcontroller itself can also …
What's up with the operating voltages 5 V, 3.3 V, 2.5 V, 1.8 V, etc.?
Integrated circuits seem to have standard voltages of 5 V, 3.3 V, 2.5 V, 1.8 V, etc. Who decides these voltages? Why do smaller devices require lower voltages?