Questions tagged [logic-level]
Logic level refers to the input and output voltage levels of digital logic, which is often 3.3 V or 5 V.
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Building a prop walkie talkie and need to get a logic high/low signal from Baofeng handset button
I'm building a prop radio, and need to be able to detect when the button on a Baofeng Handheld Remote Speaker/Microphone accessory is pressed.
The idea is that every time the button is pressed an ...
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I2C expansion for 1.8 V bus (or level shifting for PCA9615)
I want I2C communication between two nearby PCBs: the main controller (containing a Jetson TX2) and the high voltage distribution board.
The distance between boards is 5 cm, but the distance for wires ...
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Connecting 2 incompatible "I2C compatible" devices together (or alternative way for isolated current/voltage monitoring)
Global goal:
I have a non compliant 5 V I2C bus (side A of a MAX14937 isolator). In practice, it means that all devices (excepted the MAX14937) must have an output low voltage <=0.4V, and and ...
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WS2812 with ESP32 (mosfet used Si2302CDS) not working as expected
I am currently facing issue with WS2812B and trying to solve this timing when I use below timing the rgb led works fine on 5V power supply but it does not work on below 4.8V
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Threshold levels doubt on logic gates datasheet. Limit and typical values meaning
I'm working with 74HCT1G32 but I'm not sure how to interpret the datasheet value for high and low level voltage.
Let's talk, for example, about the high level.
In datasheets from other manufacturers, ...
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Using a PMOS as a level shifter from 12V to 5V
I am currently using an Arduino board and I need to connect an external 12V digital signal source to it.
I have done it using an N-MOS. The external switch can provide 12 V to the gate pin. I am using ...
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How to voltage shift signal with a load
I am trying to voltage shift a signal from 0.8 to 6 V uni-directional. I can shift it when I don't simulate the load of the output, but the moment I add a 50 Ω load like there will be in the system (...
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Implementing Multiplexer + NI DAC Control Stage for Relay Activation in Impedance Board
Test Principle Overview:
The test setup involves multiple catheter rings connected through relays.
During each test cycle:
We apply +300V DC to all but one of the rings (via relays).
The remaining ...
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3.3V to 5V logic level shifting not working with UART
I bought a whole bunch of level shifters from Sparkfun and another vendor on Amazon. None of them seem to actually work (tried with like 6 different ones). SO, I guess I'm doing something wrong.
I'm ...
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Confirming if SL2304 is suitable for 3.3V logic
Can somebody confirm whether SL2304 is 3.3 V logic level mosfet or not? Note that I want 300 mA @ VGS = 3.3 V. The datasheet I have has no characteristic curve, and can be found here.
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Level shifting 12V DC solenoid valve supply for 5V MCU input
In a project I have an MCU fill up a tank through a high-side controlled solenoid valve. As a security measure there's a float switch in series that cuts off the solenoid valve supply when an absolute ...
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3v<>24v Bidirectional Voltage-Level Translator
Generallay I saw on market 3.3 to 5v level shifter but this time I need for STM32 (3v3) to PLC (24v) voltage level shifter (translator). in textile machine there is lots of PLC controller and we can ...
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N-Channel Level Switch Odd Behavior
Hello and good evening,
I am working on my first project with a transistor for level switching. I am using 3.3V STM32 controllers and would like to translate to a 5V signal for usage with a PWM. I am ...
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Supply voltage measured on unrelated traces
I have designed a PCB for a small project I am working on, the goal is to have a Raspberry Pi to talk to a PLC, since the Pi and PLC do not use the same logic levels (3.3 volts vs a whopping 24 volts ...
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PWM logic level shift (filter, signal processor)
I'm currently working on an OSE-Signal processor to connect with my ESP32's GPIO input, in order to validate the state of an OSE Sensor. An OSE sensor is commonly used on automatically opening/closing ...
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