The Raspberry Pi is a credit-card sized computer that plugs into your TV and a keyboard. It’s a capable little PC which can be used for many of the things that your desktop PC does, like spreadsheets, word-processing and games. It also plays high-definition video. The design is based around a ...
-1
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0answers
19 views
Can't connect to raspberrypi.local from TI TM4C129 LaunchPad
I am using the WebClient example at TI TM4C129 LaunchPad to connect to a service running on my local network on a raspberry pi.
If I use IP address of the raspberry PI as the server, I can connect
...
0
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0answers
41 views
Raspberry pi motor problems
I am experimenting with autonomous vehicles using a raspberry pi and an RC car. I set up my raspberry pi to control the RC car's DC motors following this guide. All worked as expected.
For ...
-5
votes
1answer
61 views
raspberry pi, fastest way to blink with a lot of leds? [on hold]
I saw this technology:
kino-mo
In short words they placed leds onto a usual fan.
I tried to do the same thing but I can't just take a strip of leds with ws2812 and blink with them - they are too ...
-3
votes
0answers
11 views
“Deriving Spatial Information’s from a Distributed Set of Data Acquisition (DAQ) Systems” [closed]
The distributed set of Data Acquisition (DAQ ) might be just a bunch(or 3) of Raspberry Pi computers with similar sensors and a GPS (for location and timing). For this topic, ...
0
votes
1answer
36 views
How to lower volume on microphone input before outputting through headphones? (Using a DSP) [closed]
As part of a senior engineering course, my partner and I decided on tackling the problem of hearing loss in youth, and went with a more preventative approach, trying to reduce the amount of cases ...
0
votes
1answer
37 views
LED strips controlled by SN3218
I have 6 RGB LED strips and I would like to control them by Raspberry PI. 6 strips with 3 colors each require 18 controllable PWM sources, so I have SN3218 which is exactly what I need. But I am not ...
0
votes
0answers
17 views
Debugging arduino shield for varying voltage [migrated]
I'm using this motor shield for arduino from adafruit. It says it can drive 4 DC motors with it. However, two terminals M3 & M4 (as marked in the image) seem to be supplying lesser voltage.
To ...
0
votes
1answer
41 views
Multiple signals over single RJ-45 cable
I need to set up a Raspberry Pi system with remote storage, but only have access to a single RJ-45 cable. This limitation is so the system may be replaced in the future, without having to change the ...
0
votes
0answers
32 views
Using one button to control two buttons [closed]
First of all, I don't know that much about electronics, but I have decided to try and build a Raspberry Pi Mirror. I have everything working perfectly, but wanted to add an on/off push button. I know ...
0
votes
0answers
38 views
How can I let my raspberry pi 3 know that my cars ignition is off using an ignition controlled 12 volt dc input with a battery in between
First of all I'd like to clarify the difference between my project and that of the "Shutdown Controller for Raspberry Pi". I only have access to the 12 volt DC ignition controlled line for my previous ...
4
votes
1answer
57 views
Understanding an 'ideal' diode made from a p-channel MOSFET and PNP transistors
The Raspberry Pi B+ models have a protection circuit between the USB connector and the 5V net on the board. They recommend putting a similar protection circuity on a Pi HAT before 'backpowering' the ...
0
votes
0answers
6 views
Detecting 5V output from USB charger via Raspberry Pi [migrated]
How can the presence of a 5V output from a USB charger be detected using a Raspberry Pi?
Scenario: My Raspberry Pi is powered by a (USB) powerbank which is continuously being charged by a dual-port ...
0
votes
0answers
7 views
best choice for image processing and real time embeded processing [migrated]
I'm trying to learn & develop Image processing application based on opencv on a embedded board.As you know latest Ras-pi(ras-pi 3) has modern ARM A53 processor with a VideoCore that makes it a ...
0
votes
0answers
32 views
Interfacing Example for GT-511C3 Fingerprint Scanner and Raspberry PI 2 Model B
I want to know, how to connect GT-511C3 Fingerprint Scanner Hardware with Raspberry PI 2 Model B and will these connectors be good to achieve the same?
and, I want to connect the scanner without ...
0
votes
1answer
45 views
Help SIM5320 Breakout Board construction for Raspberry Pi model B
I need a breakout board based on SIM5320 for experimenting web server http requests. I've found the board shown above in adafruit library and thought of using it as reference and slim it down to the ...
-2
votes
1answer
66 views
Wire soil moisture sensor such that it only powered when measuring
I am a rookie electronics tinkerer who wants to use the SparkFun soil moisture sensor. I plan on connecting it to ADC MCP3008 to the GPIO pins on a Raspberry Pi. On the SparkFun site the vendor warns ...
0
votes
1answer
44 views
How to control house climate system
In my house I have a climate system and I want to control the modes using RPI. I'm not very strong in electronics so my question is - How can I connect RPI GPIO to this hardware X2 switch?
Like ...
1
vote
2answers
150 views
What is the quickest way to read an analogue signal - Arduino / Raspberry Pi + ADC / Arduino + ADC?
I need to sample 50Hz voltage signals from four CT current sensors and compare the waveforms to a voltage signal from the mains (stepped-down and offset for ADC) to accurately measure power ...
0
votes
0answers
42 views
Interfacing a CMOS photosensor to Raspberry Pi for low light (astrophotography)
I'm a amateur astronomer, astrophotographer & casual electronics tinkerer. I am looking to homebrew a low-light, long exposure (30s - 5min), camera prototype for astrophotography imaging based on ...
0
votes
2answers
61 views
How can I measure the supply voltage of batteris without a multimeter?
My system consists of two XBee S1s and a Raspberry Pi. I've attached a TMP36 sensor and a ...
3
votes
2answers
91 views
Different ways to detect seals? [closed]
I would like to build an underwater mammal detector to take videos of seals when they get in and out of their cave (the entrance of their cave is underwater).
It will be a waterproof sealed box with ...
1
vote
1answer
54 views
Reading LM35 temperature sensor through long wire
I'm trying to read temperature through long wire, using raspberry pi.
I use mcp3008 that I power using one of my rpi 5V pins.
I use the same 5V pin to operate my LM35 temperature sensor.
The ...
2
votes
3answers
84 views
Hardware for IP Camera Project
I intend building a custom IP camera for home use, project goals are:
Videos are stored remotely in real time (storage somewhere else in home or cloud server)
Live steaming from internet
Video data ...
0
votes
2answers
39 views
Using Raspberry Pi GPIO for matrix switching
I'm working with a Raspberry Pi. I want to be able to connect any two of 7 pins together in a matrix fashion to control a device with a keypad input. This means I need to be able to short any of the 3 ...
0
votes
2answers
111 views
How does a 4 pin IR Object/Proximity Sensor work?
How does this IR Proximity/Object sensor work ? Any resources or tutorials on how this works would be really helpful. I want to use this for my raspberry pi
NOTE : I have searched a lot on the ...
-2
votes
1answer
72 views
How to use plain 315 MHz RF Transmitter with Simple RF T4 Receiver - 315MHz using Raspberry Pi?
I bought a 315 MHz RF receiver - Simple RF T4 Receiver - 315MHz Toggle Type - and a transmitter - Keyfob Single Button RF Remote Control 315MHz, both from Adafruit.
After trying some prototyping to ...
-1
votes
1answer
108 views
Programming Intel i3 like RPi [closed]
I am building a fairly large home automation system comprising of cameras and other sensors. I experimented with a Raspberry Pi, but it simply wasn't able to handle the load. Therefore I want to know ...
0
votes
2answers
80 views
Serial communucation rasperberry pi and atmega328p
I have a design system which is generate data. My system include lidar sensor and atmega328p. Atmega is driving my sensor and generate data. No problem is here.
But my aim is data processing in matlab ...
1
vote
2answers
196 views
Flickering on PCA9685 PWM controller with 3W RGB LED and Picobuck
I'm hoping someone here has some experience with the PCA 9685 PWM controller (16 channel, I2c interface). So far everything is working pretty well after getting the circuit connected properly. I'm ...
0
votes
1answer
57 views
operating landline phone via mobile phone [closed]
I am making a small DIY project to operate my wired landline phone (twisted copper cable) using my mobile phone. Use cases:
Dial number on landline via mobile device.
Receive incoming landline calls ...
0
votes
3answers
74 views
Wire microswitch so state can be read from Raspberry gpio
I'm trying to check whether a series of valves (described here Can I measure if current is on or off in cable with 24v DC (in a cheap way)) are open or not.
Updated question to be more specific after ...
0
votes
1answer
99 views
Can I ignore resistor for IR LED?
I have two IR diodes and I want to connect them to my Raspberry Pi. From Pi I have 3.3V voltage. Diodes are TSAL 6200 .
Can I connect them to PNP and my PI without resistor safely with this wiring?
3
votes
2answers
141 views
Mechanical Switch in parallel to the Micro Controller working in Sync
Here is the image for my requirement,want to operate Load Lamp of 230V AC with Mechanical Switch in parallel to Controller where one can 'ON' the Load Lamp from the Mechanical Switch and 'OFF' from ...
-1
votes
3answers
94 views
Want to replace raspberry pi with something cheaper and customised [closed]
Recently I have built a project using raspberry pi, I am using the USB ports, LAN, 3.5 mm jack headphones, file system in raspberry pi. Now I want to replace raspberry pi with something cheaper and ...
-5
votes
2answers
282 views
M-Bus (Meter-Bus) Arduino / RPI [closed]
Is there some one that have manage to connect to a M-Bus (Meter-Bus)? With a Arduino or RPI? Maybe a M-Bus to serial is the way to go?
0
votes
1answer
58 views
Wireless data transmission options for streaming video
I am in the initial stages of planning a project that involves the wireless transmission of data between either an Arduino or Raspberry Pi and a base computer/RPi.
Data transmitted includes the state ...
0
votes
1answer
73 views
How to determine range of wifi module
I am starting to plan a project that involves either an Arduino or Raspberry Pi (haven't decided yet) connected to a number of sensors. The unit will be located outside, battery powered and will send ...
-2
votes
2answers
116 views
Intercepting graphics card output?
I was wondering what it would take to intercept a PC's graphics card output or parts of it.
First of all I'm wondering if you could even intercept the output without increasing the latency between the ...
1
vote
1answer
58 views
how can I current-limit a Raspberry Pi 2 USB host port so phones/tables do not try to charge
Although my use case is specific to Raspberry Pi, I think the question is a general USB Host port question.
When a phone/tablet (especially iphone and ipad) is connected to a Raspberry Pi 2, if its ...
0
votes
2answers
78 views
Optocoupler w/ RasPi & Door Buzzer
I'm currently trying to make a system where sending a message to my Raspberry Pi from my phone will send a signal to my apartment's buzzer to open the front door, however I've been having problems ...
0
votes
1answer
57 views
Unnatural AD9850 Output Attenuation
Yes, another question about this DDS. However, I think mine is sufficiently different from the others I've read.
I purchased an AD9850 board on Amazon for $17 from "NooElec" (see here). I've been ...
0
votes
1answer
78 views
Indoor Location Tracker for Automated Cameraman
I am new to Electronic Hardware, but have prior experience with Custom built web applications. Recently purchased Raspberry Pi and have been thinking of different projects to make with it as the ...
0
votes
2answers
71 views
CAN BUS system compatibility? DB9 to M12
I have a CAN SYSTEM with a M12 5pin male plug that acts as a sensor processor. It runs on 12 volt. I am trying to feed this system with a Raspberry Pi B system using this CAN BUS board: ...
0
votes
1answer
48 views
Media converter (eth/fiber) problem in communication
I have a system which looks like that:
CPU(macbook)<-->thunderbolt<-eth->ethernet media converter<-fiber->ethernet media converter<-eth->raspberry pi 2.
Both CPU and RP2 have static IPs.
...
0
votes
3answers
36 views
16/18 VAC to 5 VDC UPS
I'm new here so please bear with me.
I'm planning to replace my old central alarm system with a new raspberry pi, which takes 5 VDC input.
My old central uses a separate 230 VAC to 16/18 VAC ...
1
vote
6answers
247 views
Designing a circuit with a bi-colored LED for indicating power vs. system ready
I am working on a headless Raspberry Pi project. Being headless, I can't visually tell when the system is fully booted and ready to accept tasks. While a Pi doesn't take an inordinate about of time ...
0
votes
1answer
107 views
Beginning electronics programming [closed]
I have substantial experience programming computers, but never programmed micro controllers or built digital equipment. The closest I ever came was controlling modems by reading & writing ...
-1
votes
1answer
60 views
What are the options for short range under six inches 3D multi point location tracking?
What methods exist to track the position of points relative to each other. Particularly what methods allow the determination of the distance between up to ten points at once. The distance ...
0
votes
1answer
126 views
Controlling servo: how to determine the angle and needed pulse-width?
I'm kind of new when it comes to using servo's with an Raspberry Pi. Although I do have some experience, I'd like to understand things a bit better. Therefore I would like to share some questions with ...
1
vote
1answer
169 views
Interfacing Raspberry PI to HoneyWell alarm system (3V vs 12V)
simulate this circuit – Schematic created using CircuitLab
I've been working on a similar project as this but with a HoneyWell alarm system. I've managed to lower the voltage from the ...
