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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Buffering Arduino SPI bus using 74AHCT125
My SPI bus has 2 slaves, one is 5V tolerant and is connected normally to the bus, however the second one is only 3V3 tolerant and so I have to level shift it. I have decided to use the 74AHCT125 ...
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Level shift a digital 1.8V signal to split supply rail, using BJT
I have designed a DC/DC converter (based on Zeta technology) that will generate a split supply with a single buck controller and coupled inductor.
The controller's GND pin is the negative output. ...
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Level shifter (floating shifting ?)
I'm currently studying level shifters, and I have a question: Is it possible to design a level shifter that translates 0 and 5 volts to VSS (e.g., VSS = 5V) and VDD (e.g., VDD = 8V)? If so, could you ...
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How long is it okay for pin to be floating during MCU startup?
I’m using an ESP32-S3 to communicate with a 5V-only LCD module with an i8080 parallel bus interface. To shift the levels, I’m using the SN74LVC8T245 bidirectional level shifter. This means I can both ...
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Might this tri-state level shifter work?
I just thought of this idea for a one-directional tri-state level shifter that does not need an output-enable pin:
The idea is that if the input A driven hard (high or low) then it just behaves as a ...
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I2C Level Shifting (Adafruit breakouts)
I have programmed an I2C slave on an Arduino Nano and an I2C master was on an Arduino Mega. I'm now working on upgrading the master to a Teensy 4.1.
The new master is a 3.3v microcontroller, where as ...
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Is it possible to design a circuit with an op-amp that always keeps the output voltage 1 volt higher than the input voltage?
Is it possible to design a circuit with an op-amp that always keeps the output voltage 1 volt higher than the input voltage? For example, if the input is 1V, the output should be 2V; if the input is ...
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Level shifting 7.5-15V range to 0-3.3V range to read on a microcontroller
I have a microcontroller that is meant to read a voltage between 7.5-15 V range. The ADC for the microcontroller is 3.3 V max so I came up with the circuit shown below. It takes in 7.5-15 V input and ...
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Issue controlling MOSFET with PCF8575
I'm currently trying to control an array of MOSFETS so I can drive several solenoids. I'm using the Boron from particle.io as my main board, the PCF8575 as my I/O expander, the MAX3004 as a level ...
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PMOS PWM Negative Level Shifting
I'm working on two PMOS PWM circuits and need some help understanding the differences and functionalities of each. The goal is to achieve better wave transients for a PWM signal generated by a 3.3V ...
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running digital io across multiple power grounds
My circuit has a few ground references and I'm unsure how best to connect them.
I have a solar battery charging module: GV-5-MOD (datasheet) and it has a several relevant terminals:
PANEL-
BATTERY+/...
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Level shifting 0-5V signal to +-2.5V Signal
Part of the data sheet of the ANS1115:
Hey guys, I am new to electronics and hope that you could help me. I got a 49E linear hall effect sensor (data sheet) which outputs a 0-5V signal. I am feeding ...
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Analog level shifter
I have a user-adjustable supply Vcc_user (at minimum 3.3 V, 5 V, 12 V or 24 V). Adding 48 V would be a nice to have but not required. I might also use a continuously adjustable voltage.
I would like ...
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Ground in differential opamp situation
I have a setup like such in the provided schematic.
The idea is that I do have a -2.5 to 2.5V signal which I'd like to convert to a signal between 0 and 5V.
How should I connect my opamp? Should the ...
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Level shift a 0-20 V pulse to +,-10 V without deteriorating the rise time
I need a fast +,-10 V pulse. I thought I could trigger the base of a switching transistor with my fast rise time digital I/O and get a 0-20 V at the collector and then shift the DC to 0 volt and have ...
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