All Questions
Tagged with level-shifting 5v
17
questions
1
vote
1
answer
66
views
Detecting Bus Presence
I have a PCB that connects to an existing device through a simple parallel bus. I want a way to determine whether this device is connected or not.
The data lines aren't of any help, as they are ...
0
votes
1
answer
733
views
High speed logic level converter circuit
I have been trying to make a 3.3V circuit controlled by an Arduino (5V logic.)
I have used a logic converter circuit similar to the SparkFun/Adafruit ones. My problem is that whenever i try to ...
- 129
0
votes
1
answer
505
views
Bidirectional 5V-3.3V level shifter and ADS1115 resistor implementation reduction
I’m using the ADS1115 with 5V because my measuring device provides 0 to 5V measurements but since the microcontroller is not tolerant to 5V, I need to shift it down to 3.3V.
I plan to use the BSS138 ...
0
votes
2
answers
993
views
2.8V to 5V conversion not working as it should. Why?
I'm using an arduino Leonardo clone (SS Micro) who works on 5V logic only, but has also a 3.3V output for powering devices.
I'm interfacing it with a breakout board TOF sensor, the VL6180. This ...
- 567
2
votes
1
answer
1k
views
How to use 74LS245 to level up signals form 3.3V to 5V?
I am using FPGA 3.3 V outputs to drive 16x4 character LCD (5 V). I went through the data sheet 74LS245 and found this can be operated at Vcc 5 V and accept input voltages from 2 V. I am confused ...
- 49
2
votes
2
answers
1k
views
3.3V step up to 5V using BJT
I'm using an Arduino Blend Micro with outputs that provide only 3.3V and I need to control a MOSFET that needs 5V on its gate. Can I step up the voltage from 3.3V to 5V using a single BJT?
- 485
1
vote
2
answers
4k
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How to shift-up logic signal from 3V3 to 5V for NeoPixel [duplicate]
I'm working with NeoPixel led strip and a microcrontroller which run at 3.3V.
As you can read in the NeoPixel documentation using a micro with 3.3V out on pin require the ...
- 623
4
votes
2
answers
7k
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Proper use of CD4504BE Level Shifter IC for SPI
CD4504BE Datasheet: http://www.ti.com/lit/ds/symlink/cd4504b.pdf
I've been searching all over the web for a proper example of the use of this IC, but I haven't found anything. My basic application is ...
- 321
3
votes
1
answer
325
views
Interfacing 5V to 3V3 devices - MAX3377 damaging my board
I am using the bidirectional MAX3377 level translator by maxim. I am doing a prototype board and as I test this board piece by piece, everything works until I solder on this part, and my 3v3 rated ...
- 95
0
votes
1
answer
4k
views
Powering 3.3V I2C from Arduino 5V?
I need my Arduino to communicate with a fairly sensitive 3.3V I2C device, and am using a Bidirectional Level Converter to step down the voltage.
However, I still need a 3.3V source (for the I2C ...
- 113
0
votes
2
answers
85
views
Help with Texas Instruments SN74LVT125
I am interfacing a 5V system to a 3.3V using the SN74LVT125 to shift down TTL voltage to 3.3V
My problem or my question is, Some of the input pins (the A ones) are being triggered by a 5V signal that ...
- 11
0
votes
1
answer
946
views
Level shift from 5V to 3.3V (and vice versa) using 74HC4050N,652
Below you will find a link to the datasheet for 74HC4050N. My order I placed had a suffix of ",652" on that part, but I'm not sure what that number refers to.
http://www.nxp.com/documents/data_sheet/...
- 335
1
vote
3
answers
2k
views
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 ...
- 11
0
votes
6
answers
2k
views
Level Shifting Arduino 5v to 1.8v
I am trying to level shift 5v from the Arduino to 1.8v. I have hooked up the level shifter as pictured below. However, I am not getting 1.8v from pin A1. Can you please tell me what I am doing wrong?
- 139
1
vote
0
answers
1k
views
Level shift and amplify
I searched around the forum and found this post: Analog voltage level conversion (level shift)
I built a dinamic motion seat with an Arduino, H-Bridge and 2 wiper motors. The wiper motors are acting ...
- 11