Level shifting is the process of converting between different logic levels. E.g. from 0-3.3 V logic to 0-5 V logic

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What can I replace a BSS138 N-Channel MOSFET with?

I'm replicating this level shifter by Sparkfun but they use a transistor that I don't have. Frankly, I know next to nothing about transistors so reading the specs is way over my head at this point. ...
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30 views

level shifting high speed signals

I have a host of differential signals from a board thats 3.3V. Now, I need to interface it to a board that can accept 2.5V. Now, is it possible to use a standard level shifter like this ? Is there ...
9
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571 views

What's the purpose of this diode in this level-shifter?

look at this circuit: I don't get that what's the usage/purpose of the BAS316 in this circuit?
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2answers
54 views

Help with Texas Instruments SN74LVT125

I am interfacing a 5V system to a 3.3V using the SN74LVT125 to shift down TTL voltage to 3.3V My problem or my question is, Some of the input pins (the A ones) are being triggered by a 5V signal that ...
4
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2answers
47 views

Level shifting in HV CMOS processes

I'm working on a project for which custom ICs are being designed by another person on the project. The process being used is a mixed voltage CMOS process which uses a \$1.8\mathrm{V}/5\mathrm{V}\$ ...
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55 views

Level shift from 5V to 3.3V (and vice versa) using 74HC4050N,652

Below you will find a link to the datasheet for 74HC4050N. My order I placed had a suffix of ",652" on that part, but I'm not sure what that number refers to. http://www.nxp.com/documents/data_sheet/...
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1answer
47 views

How to connect a CD40109BE Voltage Level Shifter

I have a circuit requirement using a Texas Instrument CD40109BE Voltage Level Shifter. This chip incorporates 4 low to high level shifting circuits. I plan to use two of these circuits, A and B with ...
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4answers
114 views

Why do charge pumps use capacitors?

https://en.wikipedia.org/wiki/Charge_pump A charge pump is a kind of DC to DC converter that uses capacitors as energy-storage elements to create either a higher- or lower-voltage power source....
0
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50 views

Need a level shifter, is there an IC which does what I want?

I need to change 3 signals (I1,2,3) which will be at around 2V to get shifted to 5V (in one direction only to O1,2,3). This schematic should do the job, but does anyone know if: a) there's a better ...
0
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1answer
51 views

Multiple SPI devices with different logic levels

I'm going to use one of the PIC32MX795F512L SPI peripherals (master), 1 to 4MHz, to communicate with multiple devices (slaves): Wi-Fi module MRF24WG0MA (3.3V); uSD card (3.3V); 9 modules with ...
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1answer
28 views

IC switching signals with different voltage levels [closed]

I am reading about ICs and wondering if there are some ICs (and how to differ those) that can do a task which I will describe below. I have several digital outputs from Arduino. Those signals are ...
2
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1answer
73 views

Can I use a voltage divider for shifing logic levels?

I'm trying to drive a 3.3V IC from an Arduino which has 5V logic pins, so I need to shift that 5V down. There's no data from the 3.3V device to the Arduino so I don't need to shift back up. Can I use ...
3
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3answers
202 views

Interfacing open-collector optoisolator to 3.3V microcontroller

I have a bit of a puzzle on my hands trying to interface a Fairchild MID400 optoisolator (popular "logic level" optoisolator for mains detection) to a 3.3V GPIO pin. The MID400 is a 5V part [*] and ...
0
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3answers
94 views

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 ...
0
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1answer
88 views

why use 2 diodes when shifting from 3.3 to 5v? [closed]

for the question "how do I go from 3.3 to 5v" people point to the microchip cheat sheet. The Diode option has one between the data line and 5V so it pulls it almost to zero, the other one seems to ...
1
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1answer
51 views

Large range input single level shifter

I have an application where I will be taking serial signals will need to level shift the signal to 3.3V. The input signal will be from 15 to 5V for a high input and I need them all shifted down to 3....
2
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60 views

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 ...
0
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1answer
47 views

Shift DC signal to AC

I want to make a DTMF decoder and use it on an internal DC phone line. I made a decoder with PIC microprocessor (Black DTMF decoder) that works with signals around 0V. My internal phone line consists ...
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83 views

Power Supply Issue, Voltage Drop Under Load

I have the Ardupilot Mega flight control board (APM), which outputs 4.8V. I want to power CC3200 MCU with it, which needs at least 3V for stable operation. I power APM using a power module connected ...
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2answers
39 views

How to do level shifting signal in simulink matlab?

i want to do level shifting signal from -5..5v to 0..10v in simulink.. anyone know how to do that in simulink? thanks
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2answers
65 views

I2C level shifting to multiple voltages inside a BMS

We're building a BMS that has a micro on each cell in the pack. I know this isn't standard and the issues that come with it, however the pack isn't a standard layout, and the benefits out weigh the ...
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1answer
69 views

Voltage level translation

I am working on a Vehicle Tracker project. I have few digital inputs coming from vehicle system & their voltage level is 90V. These should go to Micro controller GPIOs which are @ 3.3V. What are ...
0
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1answer
44 views

Level Shifter Issue with Ground

I am using this level shifter spark fun breakout board: https://learn.sparkfun.com/tutorials/using-the-logic-level-converter My goal is to interface a 5V logic SPI LCD with a 3.3V logic micro ...
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1answer
51 views

Whats happenning with my logic levels?

I'm using a 3.3 MCU and a 5v logic RS-485 IC. I'm trying to send out some data to another controller. I don't have a logic level shifter as of now. So I decided to use resistor divider, to get it to a ...
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58 views

Driving pinball flipper with N-Channel MOSFET

I am trying to drive a pinball flipper using the circuit below, but after switching the flipper on a few times the MOSFET failed (short to ground) and the voltage level shifter appears to have been ...
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3answers
110 views

Does powering a module with 5v instead of 3.3v affect it's logic level? [closed]

I bought a NEO-6 u-blox 6 GPS Module (datasheet, pages 9 and 14), which has a standard serial connection. I have a USB to serial converter, which is 5v logic. This board says it can be supplied 3v-5v, ...
0
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1answer
93 views

Will 3.3v to 5v level converter work with USB data lines?

I'm trying to design a low-speed USB device based on ATmega16a. That chip doesn't have any USB interface, but it is possible to use bit-banging and there are even ready-made libraries to do so, like V-...
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1answer
45 views

Driving a Bar-graph LED Block With a Range of HV

I'm aware that it's possible to use the voltage drop of diodes to act as a step barrier for a rough ADC(?), as is done here (http://www.instructables.com/id/9-Channel-pure-analog-graphic-equalizer/). ...
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3answers
67 views

Do bi-directional level converters connect either input directly to ground?

So I have the following circuit, which is a bi-directional level converter: I am using it to convert a 5v logic signal (which at high is actually 4.2v and low is ~0.2v) to a 3v3 logic signal. I ...
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63 views

Level Shifter Circuit Question

Looking through the internet, I came across following circuit. MCU GPIO generates 0V or 3.3V Level. VDD may be 5V or 30V. I would like to use the same circuit for both purposes, which is to supply ...
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1answer
74 views

0/10V @ 5 mA input ,translated to 0/10V @0,2A output

The idea is a circuit where an analog input 0-10V (max current of 5mA input), reflects into an analog output with a minimum current of 200mA. The voltage of the analog output (Vo) must always be equal ...
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68 views

Voltage-level traslation from 3.3VCMOS to 2.8VCMOS

I'm developing a PCB GPRS Module for ZYBO from a Telit GL865 GSM/GPRS module as a base. The issue is to transform the high levels for the UART comunication between them. ZYBO (3.3V CMOS) has an ...
0
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1answer
159 views

I2C with 1.8V levels without level shifters?

I have problems detecting an MPU-6050 I2C device on the Intel Edison Mini breakout board (it only supports 1.8V levels). According to the thread here, it might be possible to get the sensor working ...
0
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1answer
71 views

Do I need a level shifter with an open drain output

I'm currently doing a schematic that has an IC that operates at 3.3V (HDC1000 for those curious), and the rest of my digital operates at 1.8V. I have a level shifter for the I2C lines, but there is an ...
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2answers
113 views

-5/0 volt to 0/5 volt logic levels?

Does anyone know a good way to convert -5/0 volt logic to 0/5 volt? I'm using a chip as seen in the diagram below, but I'm not sure what to do about the inverted logic levels. Basically, I need to add ...
7
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1answer
486 views

How to blink LED with 1.8V?

I am experimenting with an Intel Edison mini breakout board with pinout like here: http://fab-lab.eu/wp-content/uploads/2014/10/Edison_IO_LED.jpg Now, I soldered header pins to plug the board into a ...
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2answers
226 views

How can a GPIO logic to high amp/voltage logic adapter be built using multiple voltages? (5v, 12v, 24v)

I'm working on a project that requires making a fairly universal board (to work on different model machines). I need to hook up many pre existing motors and switches/sensors to the board that all ...
0
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1answer
79 views

Possible to use a voltage level shift IC for Arduino and external IC?

One of my projects require a 3.3V supply. Its an audio codec, TIs AIC3254, to be interfaced with Arduino Uno. The codec requires almost 300mA of current, so was thinking of using a level shifter ...
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1answer
80 views

High level logic level

I need to read a high level logic level betwwen 0 to 30 volts on a microcontroller input, is this is correct, thank you
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175 views

Switch (Relatively) High Voltage from Logic Level

The Situation: Basically, I would like to switch a load that requires 30v using a switch that cannot have more than 5v across it. More descriptively, I am trying to drive the anode of a VFD segment ...
0
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1answer
48 views

Level shifting in OPAMP and HE100T01 interfacing problem

Hi, I want to measure current of 0-50A. For that, in my application I am using HE100T01 hall effect sensor which can measure current from -100A to +100A(depending on the direction of flow it gives -...
2
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1answer
156 views

Pull-up resistors required on both side of level shifter?

My I2C sensor and my embedded processor do not agree on the logic level. So I need a level shifter. Normally I would put a pair of pull-up resistors on the SDA/SCL lines. With the level shifter in the ...
0
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1answer
52 views

uni directional logic level conversion with active drive current

I'm trying to connect an EM4095 to a cortex m0. The EM4095 requires an active high drive voltage of min 4V and has an internal pull down of 50K. Additionally it must be low during boot, otherwise it ...
2
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1answer
70 views

Dual (Shift Up and Shift Down) SPI Level Translation

I'm faced with an interesting challenge: I'm using a microcontroller with 3.3 V logic, but I need to use a SPI (4-wire) interface with parts operating at three logic levels, namely 1.8, 3.3, and 5 V. ...
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147 views

Converting 5 volts to 12 volts using a photocoupler

i have an arduino and i need to convert 5 volts to 12 volts in order to trigger a 12 volt Rele, i am considering to use the circuit that i attached here (below), if the "input" square is 5 volts, what ...
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128 views

DAC Signal to AC?

I am producing a sine wave signal from STM32F3 through DAC. but since micro-controllers can not produce negative output so my output limits to positive half only. but in my application i need signal ...
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85 views

How to combine or simplify multiple 5-12V level shifters

I've created the following model for a school project. This is the first time I'm attempting to read sensors or write alarms etc. using a microcontroller. How I can improve it? To me it seems ...
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1answer
97 views

level shifting options [closed]

I want to translate or shift 1.8V to about 2.5V. Now, there are 2 ways I can go about with it. Use an op-amp based circuit as shown below - Mosfet circuitry - Which is more efficient and why ? In ...
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1answer
103 views

How to shift level of my AC signal compared to another AC signal? [closed]

I want to shift my AC signal level. i have a floating point in my circuit (SINE wave 1 with high amplitude around 350v) which is always changing. on the other hand i have another signal (SINE wave2 ...
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level shifter alternatives using passives

I have always used level translators when communicating between 2 systems(or controllers) of different voltage levels. For eg txb0108 is a commonly used one, among a host of others. Now, why should ...