Questions tagged [level-shifting]
Level shifting is the process of converting between different voltage ranges or logic levels, e.g. from [-1 - 1 V] to [0 - 3 V], or 3.3 V logic to 5 V logic.
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Level shifting of 125 MHz clock signal
I have 3.3V 125MHz clock signal which need to be translated down to have an amplitude of 1.8V. My first idea was to use some logic inverter, run it on 1.8V, and since it probably has protection diodes ...
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Level shifting a clock signal
I need to step-up a clock signal of 8 MHz from 3.3V to 5V, I was wondering if this type of level shifter would work :
The BSD840N as rise and fall time fast enough for my application but I'm not sure ...
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Is it possible to use a simple diode and pullup resistor to level shift down in one direction?
I'm working on a circuit that involves interfacing with a 3.3v microcontroller (ESP8266) and I'd like to be able to program it using my existing FTDI which operates at 5v. I'm new to level-shifting ...
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USB to multiple RS485
I'm trying to create a device that will control a few independent RS485 lines using single USB port.
My first idea was to use GL850G usb hub controller (4 downstream ports), 4x FT232R, 4x MAX485. I ...
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Arduino <-> BBB UART issues using bi-directional level converter (5v to 3.3v)
I am having a strange issue interfacing between an Arduino and BeagleBoneBlack over UART.
The Arduino is 5v logic, and the BBB is 3.3v logic, so I'm using a bi-directional logic level converter from ...
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Connecting devices with different logic levels
The following figure is taken from this link, where the author explains how NOT to connect devices having different logic levels
He says that:
Directly connecting the devices together (see above)...
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How to shift differential signal to read with single ended adc?
I'm using a current sense resistor (0.02 ohms) for a high current battery monitor for a hobby project. I'd like to shift this to a 0-5 V range to monitor using an ADC input (single ended.)
I ...
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Square Wave Voltage Level Shifting
I have a square wave signal of 300 KHz which is 0.2 V to 1 V. It is the output of FP5138 Non-Sync PWM Controller IC. I want to drive a PMOS with this square wave but with the levels shifted to (Vin-12)...
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Pulling 5V logic low using 3.3V microcontroller
I have a shop-bought, small, portable dehumidifier that is controlled by a 5V logic chip internally. I'd like to be able to control it remotely using an ESP8266 or ESP32 (i.e. 3.3V logic). I only need ...
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How to level shift bidirectionally with a high impedance output state?
I have communications bus I am trying to reverse engineer. It is based on a 9600 bps UART but inverted so it sits at 0V when idle, and pulses at 5V to send a binary 0. Unlike a normal UART the TX ...
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Logic Buffer for SPI level Shifter 74LVC126
I am using 5V logic microcontroller and I want connect the Hardware SPI bus to SD CARD and Ethernet chip(W5500). Using below circuit I am not able to initialization SD card.
Below is my schematic:
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is this level shifter a dud or am i doing something silly?
i am very new to hardware circuitry and am attempting to connect a wiegand rfid and pin code reader to a raspberry pi for door access control logic. more details at: https://gist.github.com/grenade/...
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Increase Rise and Fall Time of this Schematic
The following cirucit converts a 3.3V PWM signal into a +-12V PWM signal and works as expected. I want to increase the rise and fall time of the ouput signal to approx 2us. How can this be done?
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Multiple ground planes, single point ground, and a level shifter
I'm using a level shifter to go from 3.3V to 5V (digital/analog). According to the datasheet, if I put 1 ground on the left side of the IC and the other on the right, it would tie the grounds together ...
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Level shifter default high problem
I recently bought a logic level converter for interfacing Arduino Uno with ESP8266. I had decided to use SPI communications between the two but after making all connections correctly it failed. ...
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Can I, Bi-Directional Level Shifter as Motor(3V) controller with Arduino Lilypad (3.3V)?
Basically this could be easily done by using a BJT NPN, but since I want to control two motors(3 V, 45-60mA) and 5 LEDs was thinking of using a Bi directional level shifter instead of using ...
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GY-521 MPU-6050 + Arduino nano - Logic converter or not?
I bought this MPU-6050: link (marked as "GY-521" on the board)
According to the manufacturers' site, the sensor logic level is 3.3V (though the eBay page says ...
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Connecting a 3.3V circuit to a 5V bus
I would like to connect a 3.3V (not 5V-tolerant) circuit (a Xilinx XC3S200 FPGA) to a TTL-level 5V asynchronous 16-bit bus (very similar to qbus) with about 30 mostly bidirectional lines. (The bus ...
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Adding level shifter circuit conflicts with other microcontroller peripherals
I'm working on a synthesizer with multiple functionalities (OLED I2C screen, encoder, audio, midi input, several keys input) on a Xiao RP2040.
I wanted to add a PS2 keyboard input.
RP2040 GPIO are 3....
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Genesis ROM + Level Shifter Circuit: Game Fails Without O'scope Probe
Problem:
In an effort to learn digital electronics, I've designed and had fabricated a modern Sega Genesis cartridge. But I'm having a problem getting the cartridge to work without the help of an ...
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Reading 2 digit 7 segments with ESP32 using TM1650 maybe?
I have been trying to contact a forum member that has done a modification to his pool equipment in order to control it remotely instead of having to go to the box every time and check on the codes. ...
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3.3V to 5V logic converter
I'm looking to drive some NeoPixels off an 3.3V Arduino Nano. I've read that I need to use a logic shifter as the NeoPixels run off 5V. Adafruit recommends the chip 74AHCT125 but I want a surface ...
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Is shorting two power rails with a capacitor like this OK?
I am using this CAN transceiver which runs on 5 V but, if you provide it with the microcontroller voltage on its VIO pin, then it will automatically apply voltage level correction for the micro.
The ...
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Best way to manage multiple 12V inputs and outputs from Arduino?
For a bowling alley I am going to make a circuit using an Arduino Mega to turn on arrow lights(1-4 bulbs in each) given the bowling pin lights that are lit up at the moment on a masking unit. AMF no ...
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Interfacing 3-5V power source with 3.3V SD-card
I'm trying to find a reliable way to connect my nRF52840 BLE-module to a 3.3V SD-card. The application is going to run on a lithium-ion battery and power is extremely budgeted.
The nRF52840 module can ...
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Buffer-cum-Level shifter using dual MOSFET
I am putting together a Buffer-cum-Level shifter using dual MOSFET to deal with PWM signal for display backlight control.
This 3.3V PWM signal is driven by MSP430G2452 and would be reaching the ...
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Voltage shifter 0-30VDC
I am required to generate and measure squared signal (PWM like). I should cover a 0-30VDC amplitude. High level of the signal is 30 VDC, low level is 0VDC. The bandwith to be covered is 0-20kHz. I ...
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Which mosfets can be used for level shifting [duplicate]
I would like to build a 5v circuit that uses an sd card and a 3.3v SPI screen and for the level shifting I would like to use the common mosfet circuit, but all versions I have seen use a BSS138 which ...
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raspberry pi 3.3 to 5v level shift for led rgb strip
I'm working on my first electronics project. Basically I'm trying to control an rgb led strip from a raspberry pi's gpio pins. I'm trying to convert the raspberry pi's 3.3v up to the 5v required for ...
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Upward Voltage Level Translation
I need to up-translate two complementary 2.5 V signals to 5 V. I am looking for a circuit which can do this and which consumes ultra-low static power. I tried to design one, using 4 MOSFETs as shown ...
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Level shift 4 V peak to peak to 0 - 3.3 V
I need to convert a 4 V peak to peak signal (-2 V to +2 V) into a 0 to 3.3 V signal to get it into my ADC on LPC 11u24. I have tried several designs but the problem is that all of the designs I found ...
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Which 74xx logic families are overvoltage tolerant on their outputs?
Here's my dilemma: I have a 3.3v active-low logic line, and I want to use it to drive a 5v active-low logic line. The 5v line already has a pullup, so my plan was to use an open-collector buffer IC ...
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Level shift 0/5V to -10V/+10V
Can anyone show me a simple circuit to shift a 0V/5V square wave (low freq, under 10Hz) to a square wave -10V (when was 0) to +10V (when was +5V).
Can it be done with some transistor or do I need an ...
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How to shift-up logic signal from 3V3 to 5V for NeoPixel [duplicate]
I'm working with NeoPixel led strip and a microcrontroller which run at 3.3V.
As you can read in the NeoPixel documentation using a micro with 3.3V out on pin require the ...
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TXS0108E8 Specification in Mbps, what is the equivalent in MHz?
I am looking at a datasheet of a level converter (https://www.ti.com/lit/ds/symlink/txs0108e.pdf?ts=1634046719564&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTXS0108E - TXS0108E8) and ...
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Level shifter for a WS2811 LED strip
I'm trying to control a WS2811 LED strip with an ESP32.
I'm using a logic level shifter to convert the 3.3V output of the ESP32 to 5V.
I bought this TXS0108E level shifter but I cannot manage to use ...
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Why is this considered a slow logic level shifter?
I'm working on a project where I have to do some unidirectional logic level shifting. I'm not able to get any chip to do it at this moment (it's late at night) so I looked up some DIY solutions and ...
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Logic level shifting from 5v to 2.8v and vice versa
I need to use a logic level shifter in my circuit which translates 2.8V logic level into 5V and the other way round. I found this document. The device itself is presented on the page 10. It is very ...
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Level-shifting ± 15V to 0-1.2V
I have an ±15 V AC output that needs to be level-shifted to 0-1.2 V level to be read by a microcontroller ADC input. It needs a rather decent resolution so that the ADC can be quite accurate.
My ...
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I2C level shifting? 2N7002DW
Can someone explain the 2N7002DW? It seems to be a two-way N-MOS (it has two circuits in one).
I have a master device that runs on 5 V and multiple slaves that run at 3.3 V and they communicate via ...
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How does an auto bidirectional voltage translator work?
I'm trying to understand how the auto bi-directional voltage translators work.
Background:
I have to choose a part that can translate signals in both ...
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Convert CMOS-level signal to microphone-level (0..3V --> -1..+1V)?
I'm building a microcontroller circuit that feeds its output into a microphone input of an audio recorder. The output is a square wave. (Think old-style 3.5mm Square credit card readers).
What can I ...
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Shifting a 2.7V digital signal to Arduino logical levels?
I'm pretty much a beginner in electronics and I'm currently working on a personal project, where I have a device, that is putting out a digital signal (square wave) that goes from 0V - 2.7V and I need ...
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voltage of input(+5V) is greater than the supply(+3.3V) provided for 74HC245 buffer
In my design I am using 74HC245 buffers between a input signal of +5v and controller pins of +3.3V. What is the supply value I have to use for buffer (74HC245). I want to use +3.3V as the supply, but ...
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How to scale (0-7V, 15-18V) to (0V, 3.3V) for OTGW project
Introduction
There is an open source project for implementation of Opentherm protocol which defines the master and slave circuit for digital communication according to the protocol specification. ...
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What happens when level translator input and output are shorted?
I am using a level translator in my design to interface between two systems. I also want an option to bypass the level translator by shorting a jumper resistor placed across terminals A and B.
What ...
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5V to 3.3V Level shifting circuit
I am interfacing an SD card to the Z80, one of which uses 5 V logic (Z80) and the other uses 3.3 V logic (SD). I believe the 3.3 V to 5 V level shifting will be taken care ...
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Looking for a level translator for single duplex serial bus
I have a 3.3V UART (two pins) plus a direction selector pin (also 3.3V.) I need to talk to and listen on a single duplex serial bus at 5V with 20 mA drive strength. The signaling rate is 3 Mbit/s, ...
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Transistor level convertor
I need to build a fast level converter, 5 V in -> 12 V out using transistors.
I've seen Voltage level shifter, but it drives the output high using a resistor pull-up, and it's slow....
I have a 100-...
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Level shifting to lower voltage: logic-gate vs voltage divider
In my design I need to level shift 5V signals to 1.8V, for now I'm planning to use AND gates with the same 5V signal on both inputs and 1.8V as the power source. I got the idea from this document.
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