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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How can I translate logic signals from 5 V to 3.3 V?
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 signal frequencies ...
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Turn off level shifter
I'm designing an LED controller with ESP for SK6812 and there are many of them connected so I need an extra power supply. The ESP uses 3.3 V but the LED's 5 V so I need a level shifter. There is not ...
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Connecting Raspberry Pi UART to Arduino Uno
AFAIK the RPi uses 3.3 V logic and the Uno uses 5 V logic.
So I need a level shifter to convert the logic levels.
I have purchased a bi-directional level shifter.
I want to check if I have wired it ...
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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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Connection Raspberry Pi GPIO to a 5v signal that isn't powered by the Pi
I have a HBaseT Matrix (EL-4KPM-V88-A2416) that has 3.5mm mono (signal+ground) plugs that is used to send IR codes to HDMI devices (it would usually be connected to an IR emitting diode placed in ...
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I2C Level Translation secondary device battery powered
I'm running a PCF8523 RTC directly on the battery supply that can vary from 3-4.28 V. The RTC must communicate over fast mode I2C with a microcontroller running at 3 V IO.
The RTC VIH is 0.7xVDD = 2....
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How to scale down 12 VDC to 5 VDC gradually for Attiny85 ADC
In my project I'd like to check the 20 contacts of a particular relay type.
A simulator power every contact with 12 VDC (max) and this goes to LMxxx comparator logic that drive some BJT transitors ...
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3V oscillator to 5V µC with an 74HCT inverter (12.8 MHz) - bad idea?
I'd like to use an AVR (ATmega328P-AU to be precise) in combination with a fairly accurate oscillator for timing purposes. I stumbled upon the fact that oscillators which have greater accuracy mostly ...
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How to read the SN74LVC245A datasheet
I'm looking for help with how to read datasheets. For the below application, specifically what in the datasheets is it that would help me choose between these components? (datasheet for SN74LVC245A.)
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Voltage Divider as Input to Level Shifter
I need to shift a 3.3V PWM signal to 5V to power a strip of LEDs. We are using a set of JSTs to connect from an Arduino to an LED strip and so only have access to the 5V power. I am having trouble ...
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CD40109 level shifter is not working
I've designed a hardware using CD40109 level shifter.
The following shows schematics.
I designed PCB and built PCBA prototype.
However, it is not working as expected.
When I am giving 3.3V to ...
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Level shifter 3.3V to 5V
I want to translate a signal from 3.3V mcu to 5V to use it on WS2812B led. I don't want to use a BSS1338 because I have seen flickering issues with high frequencies.
I have found 74LVC1G125 but it ...
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Level shifting through diodes and resistors
I just watched Adrian (of Adrian's Digital Basement channel) demonstrate a level shifter for an 80s computer using only diodes and resistors. I attach a frame with the schematic below; can someone ...
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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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Level shifting 2.4V to 3.3V
What design can I follow to make a level shifter? I have used SN75LBC. Its RE/DE has an output of 2-2.4V and I want it to connect to the receive pin of my ESP. The ESP WROOM-02 operates at 3.3V so I ...
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Need clarification on pulling the OE pin high on TXB0104PWR level shifter
I am currently working on a project that involves using the TXB0104PWR level shifter for signal conversion. In the diagram provided, the OE pin of the level shifter is connected to a resistor going to ...
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How can I find the maximum data rate of a voltage level translator IC?
I am planning to use the NVT2010 in my board for voltage level translation of the Ethernet RMII interface.
We know that the speed of RMII interface is 10/100Mbps. After checking the datasheet, I am ...
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TXS0102 level translator, problem connecting to external lines outside
I have a TXS0102 bidirectional level shifter connected to some external lines (RJ45 connector with cat 3 cable). The external lines have too much capacitance and it prevents the level translator from ...
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Op amp gain circuit causing unwanted level shift
I'm new to op-amp (and circuits in general) and I'm trying to amplify a voltage signal with a simple op-amp circuit such as this one. However, as I increase the gain (increase R2 and/or decrease R1), ...
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Adjusting signal voltage range for ADC [closed]
Can anyone please help me design a system using an LM324 op-amp to amplify a small voltage signal (from -20 mV to 31.1 mV) to a larger voltage range (0 to 5 V) so that it can be read by an Arduino's ...
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Current increase for IO Expander/Level Shifter
I’ve been designing a project recently that uses a level shifter/io expander. I’m trying to figure out the best way to go about increasing output current while still allowing the io to be ...
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How to shift/offset a AC signal
I have made the following circuit, that amplifies a 50mV RMS signal to 0 to 5V.
The circuit has 2 2nd order LPF at unity gain and a 30dB (30 V/V) gain amplifier. Below is a circuit diagram:
Input ...
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Switching line between 5 V and ground using a 3.3 V signal
I am working with a PCB which looks like shown below. Switching the central line between 5 V and ground toggles the LEDs.
I had this PCB connected to a 5 V Arduino dev board where the switch line was ...
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Do I need to level shift the PWM signal from a Raspberry Pi Pico for regular RC servo?
I am trying to control regular SG90 servo with a Raspberry Pi Pico. My problem is that those servos produce maximum torque while powered by voltage between 4.8V to 6V (5V is optimal for me.)
I powered ...
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How to shift level up voltage signal?
I am looking for a circuit to do a level shift for a signal from RL for a DAC0808LCN.
From what I see in the image, this signal has three levels (-100, -200 and -300 mV) and a 10 kHz frequency, but I ...
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Connecting APA102 LED and BSS138 level shifter (Raspberry-Pi 4)
I am having trouble getting my APA102 LED to work with a BSS138 level shifter. The APA102 LED has four wires (5V, GND, DI, and CI) and the BSS138 level shifter has ten wires (Hv, B1, B2, B3, B4, GND, ...
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Sharing clock pulse between different devices
I have an application where i want to use the external clock signal (around 1kHz) with my microcontroller. I am interested in positive edge of the clock which will be detected by microcontroller. I ...
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How to choose pull-up resistor values for level shifting circuitry for serial communications
I recently joined a new project where two ESP32-WROOM-32UE modules on separate circuit boards talk to each other via the UART pins. The distance between the two boards is roughly 1 meter of cable ...
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Analog voltage level shifter
I am looking for a way to shift a low analog voltage level to a higher analog voltage level. For example, input 0.53 V and output 1.53 V (increase by 1 V) or input 1.38 V and output 3.38 V (increase ...
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Can I pull down with 5V logic a not-level shifted (which is at 2.8V logic pulled-up) input? How to pull it up to 2.8V again, with no level-shifters?
I have a Distance sensor which has an enable pin (XSHUT pin in the diagram) which is pulled high in its own PCB module at 2.8V, to enable it to work. My Attiny85 MCU, which controls the sensor, is at ...
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Level shifter breaks down (repeatedly)
I created a Dometic Airco thermostat using esphome on an esp chip. The Dometic is expecting 5V on the serial control line, not the 3.3V coming from the esp.
So I implemented a simple circuit using a ...
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Op-amp level shifter to shift 0.33-3.3 V to 0-10 V
I have an input signal ranging from 0.326 V to 3.3 V and I need to amplify and shift it so that the output will swing between 0-10 V. How can I achieve that using an op-amp? I know I could do that ...
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IC for translating 5V to 1.8V I2C signals [closed]
Looking for an IC to translate between 5V and 1.8V I2C. I need to connect an I2C sensor with MCU. MCU I2C pins are pulled-up to 5V while the maximum voltage on the sensor's I2C pins is 1.8V.
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Level shifter circuit max current output
I want to use the BSs138 as level shifter between 3.3v and 5v as shown below.
With this setup one can get max 0.33mA on 3.3V side when level high is applied to right side. My question is if the ...
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RPM sensor signal level shifting
I have an RPM sensor that outputs a square wave. The voltage level of the output signal varies between 3.3V and 8.4V depending on which supply voltage the user has chosen for the sensor.
I need a ...
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Voltage Level Shifter Sustained Overvoltage Protection
Situation
We have a board that accepts 3.3V signals for SPI, JTAG, UART and similar protocols.
We want to connect to interfaces on other boards that operate in the 1.8V to 5V voltage range and hence ...
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Level shifting/LED driving without lower voltage rail
What's the best way to drive 3 LEDs (2 mA each) with 1.8 V signals (500 µA max) when I have only the 5 V rail (1.8 V and 3.3 V rails might not yet be available).
(For context: the LEDs are for showing ...
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BLDC Motor Controller Failure
I am developing a robotic vehicle that has four BLDC scooter-style motors that are controlled by off-the-shelf, dual-motor controllers. I have had several of the controllers fail and am trying to ...
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Shift register (CD4021BE) 3.3 V on VCC and 5 V on inputs
I have a circuit with 8 sensors connected to a shift register (CD4021BE),
The shift register is powered by 3.3 V and the sensors outputs 5 V on the signal wire when triggered.
Is it allowed to connect ...
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How do I convert an input of -1 V ... +1 V to an output of 0 V ... +3.5 V using an MCP6022? [closed]
In the simulator I get the expected result:
input: 1 V
output: 2.10 V
But when I use hardware I don't get the correct output voltage.
Can anyone give me answer with best example?
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Translate voltage between line/neutral potential and ground potential (between primary and secondary side of PSU)
I would like to know how to translate a voltage difference between two independent reference potentials, as accurately as possible.
backstory:
We are building a active power measurement station for ...
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Why PCA9306 2.9V coming at lower side even after removing the pullup
Below is my schematic for PC9306. The high side is connected to 5V and it is going to an Arduino Nano.
SDA from our ASIC is coming to J113 (SMA connector marked in RED). The voltage at this side is 2....
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Common-output WS2812 LED strip alternative control
I try to build an RPi controlled LED strip, however, while the Linux is booting, I still want a minimal effect on the LED strip. So my idea is that once the device gets voltage, a cheap ...
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8-channel logic level shifter: how to get 3.3 V output voltage?
When I apply 4.8 V (Arduino 5 V) to the B side of my level shifter TXB0108, I always get 1.2 V (which is the minimum) on the A side.
Is it possible to get something like 3.3 V or at least 1.8 V (it's ...
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Can I use a 3.3 V / 5 V level shifter to convert between 5 V and 12 V?
I need to interface few Arduino GPIOs to a 12 V device.
The direction of GPIOs is not fixed and can be programmed using a different set of control pins, so I need a bi-directional level shifter.
Is it ...
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Can a 74HC4067 multiplexer be operated with 3.3 V while routing a 5 V signal?
I have a 3.3 V MCU and I'd like to read 16 different digital 5 V signals with a multiplexer whilst minimizing the amount of level-shifting circuitry I need.
Given that the 74HC4067 is an 'analog' ...
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Does an SD card over SPI need a level shifter?
I want to implement an SD card on my PCB. As I'm lacking a bit of experience. I bought a breakout board, which I could not get to work.
https://www.az-delivery.de/products/micro-sd-card-adapter-shield
...
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How does a logic level converter with a N-channel MOSFET work?
I am trying to convert a 3.3 V digital signal to a 5 V digital signal. One way to do this is to use a logic level converter with a N-channel MOSFET and 2 resistors. I found the following schematic:
...
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I2C level shifter with only one reference
I need to translate a I2C SCL and SDA signal coming from another board with 3.3V to VDD (1.8V) on my board. So I don't have the possibility to use the 3,3V as a reference voltage. Only the 1.8V.
How ...
0
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1
answer
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Understanding N-MOSFET-based 5 V->3 V level shifter
Is there a simple way to know if a transistor is open or closed that doesn't involve writing equations and assuming that the transistor is open (passing current) and then by math finding out if it's ...
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