All Questions
Tagged with logic-level raspberry-pi
14
questions
0
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1
answer
134
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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 ...
- 5
1
vote
1
answer
64
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MCP23017 Expansion HAT logic voltage
Does anyone know the voltage range for the MCP23017 HAT - 32 channel I/O Expansion HAT's logic pins to register a HIGH signal? I know the supply voltage range is from 1.8V-5.5V, but I'm assuming it's ...
- 321
0
votes
3
answers
705
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High current bus bars on PCB controlled with mosfet and Raspberry Pi
I need to be able to switch up to 100 amp @ 48v DC with a Raspberry Pi.
I came across this video which is what I am trying to emulate:
https://www.youtube.com/watch?v=dhIbZa6yg5k
at 1:15 in the video ...
- 103
1
vote
1
answer
736
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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 ...
0
votes
1
answer
2k
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~150 WS2812b LED's with Pi Zero and SN74AHCT125N
I'm planning to control about 150 WS2812b LEDs with my Pi Zero and a 5v 11a power source (PC molex connector). Following this guide: https://www.thegeekpub.com/15990/wiring-ws2812b-addressable-leds-to-...
- 3
0
votes
3
answers
2k
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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
1
answer
109
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Would this MOSFET be suitable for use with an Arduino?
I'm looking for a MOSFET which can be controlled by an Arduino at 5V, and which can switch power on/off to a Raspberry Pi and peripherals (also 5V) that will peak around 3A of current. It's a battery-...
- 101
1
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0
answers
102
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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 ...
user218251
1
vote
1
answer
650
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ultrasonic-sensor to Logic Level Converter to raspberry pi [closed]
Trying to connect Ultrasonic sensor to my raspberry Pi. Im aware of two methods:
connect the trig to a 1k resister before connecting to raspberry pi
Use a 8-Channel Logic level converter
I trying ...
- 11
4
votes
1
answer
12k
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Help understanding 3.3v logic vs 5v logic with Raspberry Pi GPIO
This will probably be an extremely easy question for the seasoned EE's of you in the community. My question is this, I have 5v and 3.3v devices I want to interface with my Raspberry Pi's. I'm paranoid ...
- 41
3
votes
3
answers
4k
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how to increase the voltage of a digital signal?
I'd like my Raspberry Pi GPIO port to communicate with a digital circuit that works at 2x the GPIO voltage. The communication will be at a relatively high frequency (up to 500kHz).
The main question ...
- 53
1
vote
1
answer
3k
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Voltage shift from 3.3V to 12V
I'd like to use MX-FS-03V 433MHz transmitter together with a Raspberry Pi (RPi).
The Raspberry Pi's outputs have 3.3V, but the MX-FS-03V operates on 3.5-12V (the higher the voltage the higher the ...
- 135
2
votes
3
answers
662
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Logic level converter for H-bridge and UART for Raspberry Pi
Here is my situation:
I'm using a raspberry Pi to control a H-Bridge. The H-Bridge is not tolerant of both it's inputs being high logic value, which causes a short through the transistors, bypassing ...
- 123
1
vote
1
answer
3k
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Converting 3.3v logic level to 5v using octal bus transceiver
I'm using the Raspberry PI to communicate with various sensors and other circuits that input and output 5V logic level. The Raspberry Pi itself has 3.3V GPIOs, so i need to convert the logic levels.
...
- 55