All Questions
Tagged with level-shifting raspberry-pi
33
questions
0
votes
1
answer
199
views
Connecting Raspberry Pi UART to Arduino Uno
AFAIK the RPi uses 3.3 V logic and the Uno uses 5 V logic.
So I need a level shifter to convert the logic levels.
I have purchased a bi-directional level shifter.
I want to check if I have wired it ...
- 3,353
0
votes
2
answers
67
views
Connection Raspberry Pi GPIO to a 5v signal that isn't powered by the Pi
I have a HBaseT Matrix (EL-4KPM-V88-A2416) that has 3.5mm mono (signal+ground) plugs that is used to send IR codes to HDMI devices (it would usually be connected to an IR emitting diode placed in ...
- 1
1
vote
2
answers
118
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Connecting APA102 LED and BSS138 level shifter (Raspberry-Pi 4)
I am having trouble getting my APA102 LED to work with a BSS138 level shifter. The APA102 LED has four wires (5V, GND, DI, and CI) and the BSS138 level shifter has ten wires (Hv, B1, B2, B3, B4, GND, ...
- 31
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0
answers
76
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Common-output WS2812 LED strip alternative control
I try to build an RPi controlled LED strip, however, while the Linux is booting, I still want a minimal effect on the LED strip. So my idea is that once the device gets voltage, a cheap ...
- 11
1
vote
1
answer
259
views
Level shifter for interfacing SCD41 and Raspberry pi over I2C
I am connecting an SCD41 CO2 sensor to a Raspberry Pi Zero 2 W. To keep the 3.3V current draw low, I would like to power it at 5V (peak current is 205 mA at 3.3V vs. 137 mA at 5V). A TXS0108E module ...
- 111
0
votes
1
answer
320
views
How to connect RS232 level shifter?
I'm trying to use this:
https://www.sparkfun.com/products/449
to connect my RPi to my computer via a USB to serial device. (And eventually connect the RPi to other legacy serial devices)
My questions:
...
- 357
0
votes
1
answer
790
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LS7366R with multiple level-translated signals
For one of our projects, we are using two LS7366R ICs for interfacing with our two encoders.
Our encoders operate at 5 V and we are supplying 5 V VCC to the LS7366 chips as well. However, our control ...
- 25
2
votes
4
answers
1k
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Stepping up three 3.3 V outputs to 5 V
I want to use the third solution from this answer to step up three of my GPIO pins from my Raspberry Pi.
Would I need to make one of these circuits for each of the pins or could I, for example, ...
- 25
1
vote
1
answer
736
views
Using a Non-Inverting Buffer for Level Shifting
I've got a project that involves a 5V Arduino and a Raspberry Pi Zero (3.3V) that need to communicate through a serial interface. The easy solution here would be to connect them through USB, but I'll ...
2
votes
1
answer
302
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is this level shifter a dud or am i doing something silly?
i am very new to hardware circuitry and am attempting to connect a wiegand rfid and pin code reader to a raspberry pi for door access control logic. more details at: https://gist.github.com/grenade/...
- 131
1
vote
1
answer
250
views
Overcurrent protection relay: how do I simulate it with a Raspberry Pi?
I'm using an RPi and an MCP3208 to simulate an overcurrent relay. I managed to level-shift the AC signal and now I get the voltage reading at 0-3.3 V.
As this is an overCURRENT relay, I was stuck for ...
0
votes
3
answers
2k
views
Raspberry Pi with 74HC14 connecting to LED strip (WS2812B)
This might be a stupid question, but I can't seem to figure out how to convert 3.3V to 5V with the 74HC14. I have a power source which can supply 5V (see the power adapter at the left), and use it to ...
- 137
0
votes
3
answers
850
views
Why do I get constant DC 2.5V when level shifting +/- 5V to 0-3.3V (LM741 op amp)?
I'm using RPi 3b+ with ADC (MCP3208) to monitor AC signal (+/- 5V). Since the ADC can't read negative signals, I tried to level shift it using an op amp (LM741).
I tried to make this connection (the ...
0
votes
1
answer
138
views
LEDs flicker when I move my circuit
I'm building an LED driver circuit, CD4504B and TLC5916 controlled by a Raspberry Pi:
simulate this circuit – Schematic created using CircuitLab
I'm finding that sometimes when I move the ...
- 241
1
vote
0
answers
102
views
How do I wire a Rasberry Pi 3B+ to a WS2812b RGB strip?
I am working on a project where I need to use a WS2812b RGB strip. I am really worried because I have already burnt 2 Raspberry Pis with my wiring. I just want to show my schematics, and be assured as ...
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