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.

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1answer
58 views

I've run out of 5V ports on my Pi 3

I was loosely following this tutorial to drive some DC motors with an L293D chip via GPIO. Each chip can control two motors each, but what if I want to use 5 motors? I can use 2 chips to control 4 ...
0
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0answers
18 views

Choosing the correct motor for actuating a roller blind [on hold]

Using a raspberry pi zero, I'm building an automated blind controller. The blinds are this kind with a beaded cord. I'll fit a 3d printed gear that grips the beads onto the end of the axle. I'm ...
2
votes
2answers
48 views

Rasberry PI for a tractor

forgive me as I am only starting out with what Raspberry PI can and can not do, and I am far from a guru in electronics. I want to know- is Raspberry PI shock proof? Can it handle vibrations and ...
0
votes
1answer
22 views

Controlling an Electric Ducted Fan via a Raspberry Pi

How could I connect an EDF to a raspberry pi to control importantly On/Off, and if possible the power supplied to it? The information for the specific EDF is Working Voltage: 3s-4s Motor : ...
0
votes
1answer
34 views

Simple circuit to check the data flow [duplicate]

This question is a follow up for this question. I have a classic servo motor (Vin, PWM, Ground), and a short program to work with it. The code is: import RPi.GPIO as GPIO import time GPIO.setmode(...
3
votes
2answers
109 views

Use 3.3V regulator on 5V rail with GPIO

I would like to run a the LD1117H linear 3.3V regulator on my Pi's 5V rail in order to provide more current than the 50mA that the onboard 3.3V rail provides. My concern is that this is not entirely ...
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2answers
36 views

Is it possible to control DC motors without an Integrated Circuit chip?

I am working on a robot on a tight budget, I've been a bit daft as I made the DC motors go forwards and can't go backwards. So I looked at tutorials on-line and all of them suggest that you can't do ...
2
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0answers
20 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 ...
0
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2answers
57 views

3V3 enough for a 5V relay?

I currently have this relay, and it is a 5V relay (for the control circuit). Seeing as how our GPIO pins are rated at 3V3, I connected constant 3V3 power to Vcc and a GPIO pin to In1 to actually ...
2
votes
1answer
67 views

How to connect a 12V Solenoid electric door lock to a Raspberry Pi?

I would like to create a lock that can be operated via Wi-Fi. To do this I decided to connect the following 12V solenoid electric door lock to a Raspberry Pi. However, I am not sure of the correct ...
0
votes
1answer
61 views

PI 3 OrCAD schematics

I am looking for schematics of the raspberry PI 3 suitable for use with OrCAD.
4
votes
1answer
71 views

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 ...
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0answers
11 views

Running multiple Led's from GPIO pins [duplicate]

How can I run multiple Led's from few GPIO pins? I am building a smart home and I want to control lights in three rooms. I have already succeeded in controlling 3 led's from 3 GPIO pins. Can I control ...
0
votes
2answers
69 views

What happens if I put 3.9V into the GPIO Pin? [duplicate]

I have a sensor which gives an output of 3.9V when high and 0V when low. Perfect for the RPi, except is it? What happens if I put the 3.9V high signal directly into the GPIO and if bad things will ...
0
votes
1answer
33 views

4 way infrared sensor board interfacing with Raspberry

I wanted to expand my Raspberry Pi robot and bought 2x 4 way channel infrared boards with adjustable distance, but I didn't research if I would actually be able to connect these to the raspberry ...
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vote
2answers
96 views

Can I use a relay board safely without an external power source?

This is question built purely on impatience. I've just got the Pi 3 and I'm still awaiting any components GPIO related to arrive in the mail, other than this relay shield. It matches the ...
0
votes
1answer
226 views

Connection guide for GT-511C3 Fingerprint Scanner and Raspberry Pi 2 Model B

I have a Fingerprint Scanner - TTL (GT-511C3) and I want to connect that with Raspberry Pi 2 Model B, through GPIO. I have referred this website, to understand what input will go for different pins ...
0
votes
2answers
163 views

Raspberry Pi - TSL2561 Lightsensor

I have a Raspberry Pi 2+ . Now I want control a light sensor ( TSL2561 ) . I connected it to the following schedule : Where I connect the 3V to the 3V0 (not in the picture) and now to the VIN . ...
0
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2answers
58 views

Tips for keeping a motor in sync?

So I got this motor, and I need to be able to control its angle with a raspberry pi; its okay if there is a little inaccuracy, but I don't want it to lose precision over time. Any tips on how to ...
0
votes
1answer
49 views

Why do I need to connect servos to the ground of the battery and the ground of the RPi?

I'm trying to use two servos simultaneously and I've connected both servos to my battery pack which gives 6V (the servos require 6v). If I ground the servo only to the battery and I only use one of ...
3
votes
1answer
560 views

Common ground with 9V?

I'm new to pi's extending. I've a MB102 breadboard, coupled with a powersupply. I plugged a 9V power supply, and it's working (powersupply => resistor => led on). I'd like to interface some ...
0
votes
2answers
109 views

Two servos connected causes shaking

I have two servos which I want to control from my RPi. My problem is that the servos start shaking if I use them both. Both servos are connected to the +5V pin and to the ground of the Pi. So I have ...
0
votes
1answer
38 views

Why a resistance between signal and GPIO - External power source

I'm trying to power my servo from an external power source and control it with my Pi and I've found following circuit: http://razzpisampler.oreilly.com/images/rpck_1001.png Why is there a resistance ...
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0answers
15 views

IOT hacking electricity safety [duplicate]

Please, excuse me if this question is ill-suited here. I am new and in need of guidance. I am studying Internet-of-things and I'm keen on starting a first project. The tutorial I'm planning to ...
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0answers
12 views

Reuse old smartphone's screen as PI touch screen? [duplicate]

I have an old smartphone (Samsung Omnia 7) that is broken. I wonder if there any chance to disassemble it, extract the screen and plug my PI 2 on it. Any advise?
3
votes
4answers
400 views

How to read values from an clamp-on ammeter with an raspberry pi?

I want to use a clamp-on ammeter (like this one) to detect whether a table saw (230V) is switched on or not. The clamp-on ammeter is meant to be used with a volt meter and has an 1 mVAC / A output ...
2
votes
3answers
287 views

reverse engineering: Transcend digital photo frame display to Raspberry Pi

I have a Transcend [TS-PF705B] digital photo frame lying around with me for a while. And since the day i got this unit, i always gave a thought to do some thing with, like hooking it up with my ...
1
vote
1answer
220 views

12v+ on Raspberry Pi Ground Pin

I am currently working on a project that requires a 12V RGB led strip controller. basically this is the controller: Please note that I am using a raspberry pi 2 and that the pins in this diagram ...
1
vote
0answers
49 views

Splitting mains power into individually-controllable circuits [closed]

Introduction My goal is to split a 1-gang mains power extension lead into three, have my Pi plugged into one of the ouputs and have it able to switch the other two using relays. (Incidentally, I ...
1
vote
2answers
346 views

Dimmer - How synchronize PWM with 230V power supply?

I need your's help with dimmer which is controlled by Raspberry PWM. My problem is lack of synchronization PWM with power supply. Unfortunately , I don't have oscilloscope waveforms to show my problem,...
2
votes
1answer
62 views

Making a plug and play setup for devices connecting to the Pi

Hopefully I am asking in the right place, being electrical and code, not sure. In short, I want to create a plug and play setup for different devices(mostly sensors and relays) to be attached. ...
5
votes
5answers
913 views

Is there a component out there that can push a button i.e. will extend a rod about 1 inch and then retract it?

I'm basically trying to find something that can push a button for me. I want to be able to control it through code, just like you can with motors, LEDs etc.. via the GPIO on a Pi. I want it to extend ...
5
votes
2answers
190 views

Easy way to switch on and off of 12V DC current

I recently bought a compressor and now I want to be able to turn it on and off programmatically using my Raspberry Pi Model B. Since I know nothing about electronics, it seems like the safe option ...
2
votes
2answers
45 views

Is it safe to drive a current between a GPIO output at 0V (LOW) and the 3.3V supply?

Normally I would drive a current between a GPIO output at 3.3V (HIGH) and GND, for example to light a LED (with a resistor included of course). I am now wondering if it is safe to drive the current in ...
3
votes
1answer
255 views

Using WiringPi with Jasper (voice recognition)

I am using Jasper. The voice control part works, however the function I call when a certain word is said, does not. I'm trying to control a robot, sending high signals to certain pins on an L293D ...
2
votes
2answers
139 views

Using an L293D chip (to control a motor) with a separate power supply

I've got an L293D Motor Driver chip powered by 4.5v via some batteries and am trying to send high signals via the GPIO library in Python to control a motor, however this does not seem to work. My code ...
4
votes
1answer
486 views

Connecting a standard telephone through GPIO

I am wondering if you can interface a standard, RJ11 telephone through GPIO, and input an output through the phone, even using asterisk to connect to voip. The phone I have is a GE model number ...
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0answers
35 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 ...
2
votes
1answer
109 views

Not getting 3.3v from GPIO Pin

I hope this is the right place to ask this kind of question. I'm quite new to this, so I expect there is a simple explanation. Basically, I have a small electro magnet (the type from an old doorbell)...
1
vote
2answers
74 views

Limiting GPIO input voltage

I am a very recent new Pi owner and am setting up to build a 'lab board', with a breakout breadboard for the GPIO pins. I have read a great many dire warnings about frying the Pi if I accidentally ...
0
votes
1answer
118 views

Controlling a Solenoid With GPIO Output Using a Transistor

I'm trying to control a solenoid using the RasPi 2's GPIO pins. Since the solenoid needs more power than the RasPi can provide, I'm using a 9V battery to provide the power. I started with just wiring ...
0
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0answers
44 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
votes
2answers
50 views

Raspberry Pi jumper

This is a strange question, but I just want to see if it's possible. Basically, would I be able to safely connect the 3.3 or 5v cable to another GPIO pin as a sort of jumper? So for example, if if ...
0
votes
1answer
207 views

GPIO HW PWM @ 143Hz and 20-80% duty cycle, with WiringPi's gpio utility

I've tried to find the solution from other threads but they all seem to miss the point to a certain degree, usually going into kHz and MHz, or into the SW GPIO territory that I don't need. I have a ...
1
vote
1answer
106 views

GPIO's firing every ~3 milliseconds

I'm currently building a project using adafruits arcade buttons, and seem to be having a bit of an electrical problem. Using a Raspberry Pi 2 , and after confirming that wires aren't touching in ...
1
vote
1answer
150 views

Trying to shortcircuit a computer motherboard pin with the Raspberry Pi

So I'm working on a project which requires me to compile the kernel of my desktop machine at the office. But I do a lot of work at home using SSH. As the kernel is very delicate, it causes a lot of ...
0
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2answers
125 views

Raspberry pi location detection [closed]

Id like to create a small "car" alike robot (4 wheels and steering via servo) that will travel around my house. Id like the robot to be able to go and charge itself when its batteries are low, I do ...
1
vote
0answers
47 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
votes
1answer
52 views

How to create DYI female jumper cables from male cables?

I just got a elctronics for Arduino/Raspberry Pi. The problem is that all the jumper cables included are male to male. I know I could easily just buy more cables, but I'm wondering if any of you know ...
0
votes
1answer
163 views

MCP3008 returns sinusoidal values

Alright, I have to start off with the fact I'm a n00b. So there's a good chance I'm screwing something up. I've got an MCP3008 10-bit ADC hooked up to my Raspberry Pi B+ via a Cobbler. Here are the ...