Questions tagged [logic-level]

Logic level refers to the output voltage levels of digital logic, which is often 3.3 V or 5 V.

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Converting 3.3v logic level to 5v using octal bus transceiver

I'm using the Raspberry PI to communicate with various sensors and other circuits that input and output 5V logic level. The Raspberry Pi itself has 3.3V GPIOs, so i need to convert the logic levels. ...
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TTL logical low isn't ground

I'm working with an Arduino Due and four 5V TTL pressure sensors. I'm using this logic level converter to convert from the 3.3V Due to the 5V sensors. I've been having problems using all four at a ...
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Single transistor level up shifter

I need a simple, single directionnal level shifter for 3.3V -> 5V conversion. There are many options on the internet, some using a logic ic and some using 2 NPN transistors (converter and inverter), ...
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Step up 3.3V to 5V for digital I/O

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 ...
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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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391 views

Is the logic level of a MCU the same as the operating voltage?

The Atmega328 has an operating voltage of 1.8V to 5.5V. If I was operating it at 3V (by supplying 3V to VCC) and set a pin to high, would that pin be at 3V?
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Sensing 12v inputs in 3.3v system

Sorry if this has been asked before, but I searched for a while and didn't find anything that exactly answered my question. I would like to sense the "dummy lights"(oil, neutral, etc.) in my ...
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Detect logic signal in a long distance. What type of interface to use?

My daughter board uses a comparator(LM339) to output logic 1 or 0 under a 3v3 supply. The cable connecting daughter board and main board is at least 1.5m. Luckily, the frequency is not fast but the ...
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multiply binary numbers [closed]

Is it any book which explains how to multiply binary numbers and how to create appropriate digital circuit schema?(i.e. digital schema which compute the multiplication of the binary numbers).
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616 views

Translating to “below ground” logic levels

I have an RF switch chip that is controlled by a logic signal with levels of 0 V and -3 V. I want to control this from a CPLD that's producing ordinary +3.3 V CMOS levels. Board area is at a premium ...
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controlling SPI devices using the Arduino - different voltages

My arduino board uses 5v to power the atmega chip. I was wondering is there any thing wrong with powering my atmega at 5v but say I power my MCP4922 dac at 3.3v does it matter? It just that I've seen ...
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Connecting 3.3 and 5 V devices

The requirements are different from similar questions I've found here. TXB/TXS are expensive for my needs. Sparkfun's logic shifter is bi-directional, while I need two uni-directional conversions, <...
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What is the difference between a voltage-level translator and a logic-level translator?

(This is a follow-up to an earlier question of mine.) I would like to use the GTL2000 bi-directional translator IC to facilitate level translation between a 3.3V circuit and a 5V circuit (including ...
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Interfacing 3V TI MSP430 to PC serial port

I am scratching my head to figure out a possible soloution for this scenario: I am developing a simple application using TI MSP430 microcontroller. The microcontrol part is powered by 2xAA batteries. ...
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119 views

what are cores in real in a cpu?

i would like to know what cores at physical level are in a cpu. some mix of logic gates make a head that's called a core is it?.so one core how does it appear to be in physical level.! PLease am new ...
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Logic Levels between 5(V) and 3.3(V) devices

I am using a 5V microcontroller to communicate with a Bluetooth module operating at 3.3V. I have regulated the output from the 5V microcontroller rail to 3.3V rail for the Bluetooth module. Since I ...
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Using an open-collector output from one IC to trigger a level change on the input pin of another IC?

So my problem is simple: I have an IC that provides an output pin to alert you when some condition is met. The output pin is open-collector, high-impedance when active. I want to monitor this output ...
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1answer
172 views

Need 1-4 pins controlling 16pins logic level

I have max four outputs coming from a PIC. I need these four outputs (or one serially) to simultaneously control 16 pins with a logic level. This is for a clock application. A BCD could accomplish ...
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Methods to drive a multiplexed LCD with logic-level signals?

I've used such a technique in a couple of the products I've designed, but I've never seen anyone else do so. It's possible to drive a 3-way multiplexed LCD using a bunch of 74HC595's to generate an 8-...

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