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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voltage diffrence between aduino uno and sim800L
Okay, this might be a stupid question.
I'm using a SIM800L module and trying to get it to work with an Arduino UNO.
From my understanding the sim800 module uses 3.3 V logic levels and Arduino uses 5 V ...
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What does Vdd and Voh mean?
I truly apologize if this question title is vague I don’t really know entirely what to ask. I’m a programmer interested in computer architecture and I’ve been reading a book about digital design. ...
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Will the frequency change when converting the ESP32 3.3 V logic to 5 V logic using a TXS0108E?
The GPIO on ESP32 (S3) are all 3.3 V logic. I want to control an ESC for a drone. The manufacturer says:
The ESC will use a standard 5 V PWM signal at 50 Hz between 1100 µs and 1950 µs. 3.3 V output ...
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Can I use GPIO logic level converters as tiny low-current solid state relays?
In order to use a GPIO pin to drive a 180 mA mini water pump, the GPIO pin needs to switch a MOSFET or an Optocoupler because it can't safely do 180 mA.
I want to run 16 low-current pumps from 16 GPIO ...
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Ground detection circuit
I'm designing a circuit containing a button with a pull-up/pull-down logic depending on whether I'm grounding a header. The button triggers a GPIO that will detect if the header is grounded thanks to ...
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Making a circuit switch using MOSFETs
I am trying to control the choice of 2 circuits using MOSFETs, at logic levels. Basically, I’d like to have one circuit feed bits to an IC in some conditions and another circuit do the same in ...
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AVR32DA VIH threshold
I am looking into using an AVR32DA48 MCU for a design. The MCU will be powered at 5V and needs to interface with an IC at 3.3V. The IC is 5V tolerant and I am trying to figure out if a level ...
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Logic translator between different ground references
I need to translate a 1.8 V digital signal ("power good" from a DC-DC converter) from a "floating" voltage domain to a 3.3 V signal referenced to a fixed system ground.
The source ...
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Level shifting from 3.3V to 5V not working: voltage drops when attaching load
I am trying to trigger a laser using an Arduino. I used a power supply to determine that the laser needs a 3.5V (or higher) signal, at which point it draws around 2.2mA from the power supply. When ...
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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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I am using a logic level converter for my LED-Ring but it's not working
I am working on a small project where I am using a SparkFun Lumini LED Ring. The power supply for the ring is external, connected via its own cable and power adapter. I have connected the ring to the ...
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Interfacing Delta PLC and Arduino (Logic Signals)
I am trying to connect a Delta PLC (DVP-10SX) to an Arduino UNO. What I'm trying to achieve here is to be able to exchange Logic signals between both the PLC which has a logic level of 0-24V and ...
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Unable to read data through a MAX485 module
I used arduino code in order to grab RS 485 data from a sensor.
The middleman is a MAX485 module.
However, I was unable to read the data, even with code that works from previous examples.
I hooked up ...
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Wired AND and OR question, logic levels?
In the "wired AND and OR" gates pictured can anyone explain what the voltage levels will be for each function?
For AND, I see the output is A*B and for OR, A+B. Is this correct? Also, is ...
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Do I need a bidirectional logic shifter for UART
I need to interface my Raspberry Pi to my Uno hence I need to logic shift 5 V logic to 3.3 V. I will be sending data from the Uno to Pi and from the Pi to the Uno.
My understanding is UART uses two ...
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