Questions tagged [electronics]

Use this tag for questions related to how to use control electronics from the Raspberry Pi, and how to control the Raspberry Pi from electronics.

28 questions with no upvoted or accepted answers
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GPIO to hifi amplifier's trigger input (remote power on). Protection? Circuit?

I use my raspberry 1 B+ with a DAC board (like hifiberry) and volumio/moode audio distribution. The board is working as a pre-amp and it's connected to my hifi amplifier RCAs input, sending analog ...
2
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0answers
130 views

Raspberry Pi as a Hi-Fi component

After reading the following post, I was wondering if I could achieve something similar with my own setup. I do own an old Technics SL505. However the nasty part of this setup is that each components ...
2
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0answers
373 views

Can I control 5050 RGB Strips with the Raspberry pi?

I have purchased 5 meters of a 5050 RGB Strip yesterday. I bought it for my PC case, but of course I don't want to use 5 meters in my case. I want to do some smart lighting in my room and a bias ...
2
votes
1answer
1k views

pull up resistors from rpi-gpio.js

I want to use the internall pull down resistor. In python the setup method accepts a parameter for that, like: GPIO.setup(18, GPIO.IN, pull_up_down=GPIO.PUD_UP) according the rpi-gpio.js ...
2
votes
0answers
321 views

USB devices gets new ttyU* while still attached raspberry pi 2

Conditions: I use RP2 for data collection purposes and i am testing its limits. I use it next to diesel engine and its alternator.(I know pi is not for industrial use and this is a prototype.) There ...
2
votes
1answer
543 views

GPIO pin PULL_DOWN would

I have set up a Arduino to send a 3.3V signal to my RPi if an object is detected in front of the UltraSonic sensor. I have measured the signal at 3.26V. But it does not work. Since the signal from ...
1
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0answers
48 views

I2C pin states when RPi powered off

I have a setup where RPi may join existing I2C -bus as master when powered on. Before taking over, it will first notify secondary master with "slave select" -line so that the bus becomes free for ...
1
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0answers
60 views

How to extend battery life on custom pi laptop

So I'm trying to make a pi laptop based on this project with a few differences: I use this display instead of this Technically, I'm using 18650 cells, but at a slightly reduced capacity No Arduinos ...
1
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1answer
625 views

Decrease the sensitivity on Capacitive Touch breakout?

I have this capacitive touch sensor: https://learn.adafruit.com/adafruit-capacitive-touch-sensor-breakouts/overview And it is WAY too sensitive for my purpose. I want to have a conductive panel on a ...
1
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1answer
307 views

What Circuit Should I Use to Hardwire Raspberry Pi to Doorbell?

I am trying to connect my raspberry pi to my hardwired doorbell in order to send a text message when the doorbell button is pushed. I have successfully sent the text message using a button connected ...
1
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0answers
276 views

300hz digital servo not working with Raspberry Pi

I ordered a digital servo JX 5521MG to use with my Pi but when I use the code below the servo does not move but there is a slight tick or twitch inside. gpio pwm-ms gpio pwmc 192 gpio pwmr 2000 ...
1
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1answer
408 views

Accidentally shorted C97 on the Raspberry Pi with a washer

I accidentally dropped a washer and unfortunately it landed on the C97 capacitor. I think that shorted the pi out. The ACT and PWR lights are now solid red and green, whereas it was blinking ...
1
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1answer
294 views

Is my wiring diagram correct for Raspberry Pi powering LEDs and Solenoid Lock?

I'm working on a project to take a mic input (over USB) on a RPi 2 and trigger the action of white LEDs lighting up and a Solenoid Lock activating by turning GPIO pins to ON. However, I'm far from ...
1
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0answers
64 views

GPIO Wiring Check - Am I doing it right?

After almost frying my Pi with my last question, I thought I'd better ask if what I have seemingly working is ok and won't cause me any problems. I have a modern wireless doorbell that I am powering ...
1
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0answers
67 views

I broke C13, is it serious doctor?

EDIT: I got a good answer on electronics SE, you can check it out here. While desoldering the GPIO, I accidentally broke the capacitor C13 of my raspberry pi model B (2011.12 Rev7). It is the ...
0
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1answer
464 views

Connecting 4 HX711 to one Raspberry Pi

I have four individual scales that are each connected to a HX711, those HX711s are each connected to the Raspberry Pi. I'm a beginner in python as well as this Rasberry Pi. how do i properly code this ...
0
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1answer
37 views

LED matrix won't light up properly

As you can see it won't light up correctly, why is it so? Is it possible that there are some issues with common cathode or anode? I tried using just that smaller one by itself, in a similar fashion ...
0
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0answers
101 views

Multiple raspberry pi's 3 synchronized image navigation

We have 7 raspberry pi's 3, each connected to the internet and an display. On each screen / raspberry pi is geeqie (image viewer_ running with an image slideshow. The goal is to have all raspberry pi'...
0
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0answers
29 views

raspberry multiple magnetix switches

I have a Pi 2 and I would like to monitor the state of 3 magnetic switches. All of them are in close distance, no more than 3m of cabling for each one of them. How can I connect them to monitor their ...
0
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0answers
244 views

How to connect sensor to Raspi via poor man’s a/d converter?

TL/DR: I’m using this and there are things I don’t understand about this circuit. Ultimately I’d like to read data from this sensor, but all I get is gibberish. Please, help. I have set up “poor man’...
0
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1answer
54 views

What will happen if I put my ESC's BEC black wire to ground and yellow/white wire to 5v pin directly

I wanted to do some experiment with raspi, ESC and BLDC motor. I am able to run my motor using servo tester. But I was curious what will happen if I connect ESC's BEC to Raspi's GND and 5v output ...
0
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1answer
885 views

How to read data from an NI DAQ USB-6259?

I have a sensor for which I'm forced to use a NI DAQ to read data from. And I have a USB-6259 to do so. I don't want to connect the DAQ directly to my laptop because it has messed it up before. I ...
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0answers
75 views

Wireless Communication with Electronics

I'm working in an Escape room, I have a pi as main brain of the thing using a nodejs server, but I want some small stuff away from the pi to talk to it wirelessly. My first approach would be to have ...
0
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2answers
286 views

Relay boards that can handle 20V 20A DC

I'm looking for relay boards that can handle 20V/20A DC easily and can be switched with the raspberry pi. I have been googling for days but haven't found anything ready made for DC, only for AC. I ...
0
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0answers
107 views

How can I get a Raspberry Pi to monitor a large number of Switches and Relays?

I have a raspberry pi, and I a significant number of relays in my house that I want to monitor. How can I use the Raspberry pi to monitor these relays, I do know a bit of electronic knowledge and good ...
0
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0answers
709 views

Powering 3.5 inch LCD screen and RPi with 7.4V Lithium Polymer Battery

I am attempting to create a portable Raspberry Pi. I am wondering how I would go about running the RPi and the LCD screen from the same battery. The screen draws about 6.5V. I have a 5V voltage ...
0
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1answer
174 views

Connecting RPi GPIO into a relay that draw high ampere

So straight to the problem I need to connect My RPi's GPIO to a (or some) relay(s) that consume around 30 - 60 Amps to fire up and RPi GPIO only give around 16 mA/Pin(Accroding to this). My question ...
-1
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1answer
65 views

Powering a line following robot with a power bank. Any thoughts?

I am currently wondering for a college project, if it'd be possible or not to use a power bank to build a line following robot and power both the pi 3b+, the waveform motor driver hat with 2 dc motors(...