All Questions
Tagged with level-shifting power-supply
13
questions
0
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answers
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Turn off level shifter
I'm designing an LED controller with ESP for SK6812 and there are many of them connected so I need an extra power supply. The ESP uses 3.3 V but the LED's 5 V so I need a level shifter. There is not ...
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1
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1
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Level shifter is injecting noise to ground
I have a camera core with a DVP interface which has 2.5 V data logic and the system I am using is 3.3 V level. So I have used a TI SN74AVC20T245 level shifter to shift 2.5 V to 3.3 V.
The image from ...
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2
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4
answers
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How to regulate 5V 3A to 3.3V for ESP32 and level up 3.3V to 5V on a PCB?
I'm making my first custom PCB with an ESP32-WROOM-32E. I am following this tutorial for the ESP32 part. My project requires a 5V 3A power supply but the ESP32 only takes 3.3V.
The tutorial uses an ...
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4
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Controlling device with Raspberry PI with different power supply
I want to control USB switch selector with Raspberry PI(RPi).
The switch (amazon) have an external wired remote with micro button and couple of LEDs.
I need to emulate a button press and ideally ...
- 41
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2
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1k
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Using a voltage divider versus step-down voltage regulator for i2c pull-up
I have a device (NXQ1TXH5) that I want to run at 5V. I am also interfacing this device with a Raspberry Pi4 for i2c communication. This raspberry pi 4 is going to be the master in my i2c network. This ...
- 360
1
vote
2
answers
271
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Connecting signalling lines of the multiple devices with different power sources
I started to develop a simple device and this question arose. I need to make some uC device that will be connected to the PCI-E bus via M.2 socket. And I need this device to be working even during ...
- 210
2
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3
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2k
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Protecting a 3.3V circuit from 5V power supply
I'm designing a dev board for 3.3V parts. On the dev board, I will have a header for an "FTDI Friend" USB-to-Serial converter.
The FTDI part can supply Vcc to the target board.
However, FTDI parts ...
- 378
2
votes
1
answer
337
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How to transmit many digital signals between two systems powered by different power supplies
I’ve run into problems with my project.I have two different power supplies and I’m trying to pass logic signals through the system as you can see in the picture.
I’m looking for an IC that could ...
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1
vote
3
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2k
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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 ...
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2
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3
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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 ...
- 395
0
votes
1
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260
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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 ...
- 97
2
votes
3
answers
156
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Connecting devices with different logic levels
The following figure is taken from this link, where the author explains how NOT to connect devices having different logic levels
He says that:
Directly connecting the devices together (see above)...
- 1,638
15
votes
4
answers
25k
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Shutdown Controller for Raspberry Pi in a car
Following on from my previous question I'm trying to create a shutdown controller for my Raspberry Pi. The Raspberry Pi needs to be powered from the battery, but should power-down after the Pi ...
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