What does 3V3 or 1V8 mean? - Electrical Engineering Stack Exchange
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?
pcb - How should I connect pins of the same type (ex: VCC_3V3) in a ...
Jan 1, 2026 · Here is the link to the schematics by the way: Schematics Link There are various instances of pins labeled CHIP_PU or VCC_3V3. How should I connect these pins to each other? …
arduino - Driving 5V powered relay module from 3V3 powered ...
Jul 21, 2020 · What I'm trying to do This question is about the use of any 3V3 supply microcontroller to drive 5V powered relay modules which are available from many suppliers. I have provided details …
Circuit for 12V relay with an optocoupler using 3V3 GPIO
Feb 4, 2022 · I am trying to design a circuit to control a G6S-2 12V relay that powers on/off a 12V device using a GPIO from an ESP32-WROVER and one PC817 optocoupler. This is the circuit that I have …
How to switch "best" between two voltage sources (5V & 3V3) for a ...
Apr 6, 2021 · How to switch best between two voltage sources (5V & 3V3) for a "load" (e.g. a sensor in the application field or Arduino/Raspberry Pi/etc.). The basic setup is as follows: there are two …
3V3 relay control with ESP-01 - Electrical Engineering Stack Exchange
Nov 8, 2020 · 3V3 relay control with ESP-01 Ask Question Asked 5 years, 2 months ago Modified 5 years, 2 months ago
Raspberry Pi Pico 3.3V_EN pin control voltage inquiry
Jun 22, 2021 · The Raspberry Pi Pico seems to have a 3.3V_EN pin which is basically the 3.3V regulator enable pin (3V3_EN) pulled up to 5V through a 100K resistor internally. I am confused how …
3v3 JTAG interface on Spartan 3 FPGA - Electrical Engineering Stack ...
Jan 4, 2022 · I made a mistake thinking the Spartan 3's JTAG was 3v3 instead of 2v5 and connected the FPGA directly to the 3v3 JTAG. Xilinx wrote an Application Note about using a 3v3 JTAG interface …
How to properly use a relay module with JD-VCC from …
Jun 13, 2020 · Using the 3V3 Raspberry Pi (or 3V3 Arduino) as an example, The Songle relay switch power is from external 5V power source, Vcc is connect to Rpi's 3V3 logic power, and IN is …
Bidirectional 5 V to 3.3 V level shifter
Oct 6, 2022 · How do I interface 3.3 V Input/Output to 5 V Output/Input? I need it primarily for an Arduino Due but any general purpose bidirectional circuit (or IC) would work. Some people advised me to use …