All Questions
15
questions
2
votes
1
answer
2k
views
Problem with 1-Wire devices not showing up on GPIO4
For a project I want to implement 1-Wire communication in a Raspberry Pi Zero W. The goal is to use a Maxim Integrated Max17313 Fuel Gauge for inspecting battery usage.
To make sure the implementation ...
1
vote
1
answer
337
views
Delay/Lag when controlling motors with arduino from raspberry pi
I'm making a car-type-thingy where I control motors connected to an arduino with a raspberry pi via serial communication. I'm using the adafruit motor shield to control the motors. I want to control ...
- 11
3
votes
0
answers
1k
views
Controlling a laser rangefinder via the raspberry pi
First, a disclaimer that I am an electronics newbie. I got my hands on a laser rangefinder which looks very similar to this:
On the top left corner, there are two sets of pins. The first set has ...
- 31
2
votes
0
answers
2k
views
Hardware controlled RTS on a Pi4 not working accurately
We need to use RS485 to talk to one of our custom tools. We need to use hardware controlled rts/cts. I've read so many articles about this but nobody ever says it works for them with fast timing and ...
- 21
3
votes
3
answers
1k
views
How can a 12VDC power supply stepped down to 5VDC for Rpi?
Good day,
I have a Raspberry Pi Zero W that I would like to deploy onto a tower that is supplied with 12VDC power from a photovoltaic solar panel.
I'm currently looking at powering the Pi Zero W ...
- 31
0
votes
1
answer
530
views
How to use the DMA-DREQ/PANIC threshold of the hardware-PWM
I'm using the hardware PWM that is described on page 138 of the BCM2835-ARM-Peripherals document.
The description of the DMAC-register (page 145) indicates that one can set the FIFO-threshold at ...
- 101
0
votes
1
answer
106
views
no HDMI, how to connect via arduino
I have a Raspberry Pi 3 but no HDMI cable but I do have a 2560 mega Arduino.
I read a couple of places that Arduino has an onboard ttl chip.
on the Arduino I shorted reset to gnd (which should of put ...
- 1
3
votes
1
answer
5k
views
Raspberry Pi as Wiegand device - output Wiegand to receiver
I would like to build a Wiegand device from Raspberry Pi to output 37 bit Wiegand format data to Wiegand control unit receiver.
I don't want to read the Wiegand protocol on Raspberry Pi like from ...
- 133
0
votes
1
answer
194
views
Raspberry Pi Zero as Hardware Bypass
My girlfriend has been working on a project for a high level university CS class. The requirements are that input is take from a gaming controller, steering wheel, et al, and sent simultaneously to a ...
- 103
1
vote
1
answer
2k
views
Can I use an FT232RL USB to TTL adapter with Raspberry Pi for a GPS module?
I am just starting to scratch the surface and attempt to understand TTL and serial data ports in general, and am really just trying to put the pieces together and see if I'm on the right path.
First, ...
- 299
7
votes
1
answer
16k
views
Is there a way to attach multiple serial port devices to a single raspberry pi?
I have three separate devices that all need access to a data serial port on the pi. My devices are an accelerometer, a GPS unit, and a GMS cell service chip. I've found tutorials on how to attach ...
- 299
1
vote
1
answer
940
views
How to access SPI on Raspberry Pi B+
I tried searching here and other places. What is the best way to access the SPI and get the fastest speed out of it. My project involves interfacing the Pi with an ADC that is rated for 5Msps (http://...
- 135
1
vote
1
answer
1k
views
How to connect Raspberry Pi to the serial interface (TTL) of a Cubieboard?
Can I use a Raspberry Pi as an adapter for connecting to Cubieboard TTL?
I don't have USB-Serial adapter but need to read it.
- 13
4
votes
3
answers
2k
views
Analog input to the PI
I have a bit of a specialized question for you. Recently I got my Pi up and running, and am amazed at what it can pull off. But I want more.
I want to be able to record the output from an ...
- 143
6
votes
2
answers
3k
views
UART Output working on 57600 Baud but with 115200 only gibberish
I've got a strange problem with serial output. Using Wheezy and 8 Databits, 1 Stopbit, NoFlowcontroll, NoParity (config as stated in eLinux Wiki). With 57600 Baud everything works fine but with 115200 ...
- 661