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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0answers
16 views
Raspberry pi and shift register
I have a project using a Raspberry pi and an 8 bit shift register to pull one of the 8 pins to ground if an event occurs, but leave it at 5 v 99% of the time. Ideally this will be done with Python, ...
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1answer
71 views
Has anyone manage to drive a HD44780 LCD using a 74HC595 shift register?
Using Python, I am trying to interface with a HD44780 16x2 LCD display and would like to save a few pins from my Pi's GPIO banks by using a 74HC595 shift register.
So far, I have managed to run the ...
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2answers
82 views
Which platform is best for project? Raspberry vs Arduino?
[CAVEAT: Very basic question from someone who not yet even at the "newbie" stage. Please forgive is the question is too basic and/or poorly formed. --thank you!]
Greetings!
I work for a small ...
2
votes
2answers
84 views
Capacitor C6 dislodged
I managed to break the C6 capacitor on Raspberry Pi Model B. Its the 220uF 16V EE6 capacitor. Nobody seems to have such low capacitance, low voltage capacitor (the least I can find is 220uF and 60V). ...
2
votes
2answers
249 views
Power USB hub and Raspberry Pi with the same PSU
I am still searching for a solution to conveniently power some external hard drivers.
I would like to use only one AC plug as I think it is not very efficient to use two different PSUs.
My idea is ...
3
votes
2answers
92 views
Electrical characteristics of GPIO
Is there a spec sheet anywhere which lists the electrical specifications for the varios GPIO pins on the RPi revision B? For example, if they are open collector etc, output voltage, max input voltage, ...
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1answer
72 views
Correctly grounding a circuit
I have a very simple circuit using the Adafruit breakout Pi cobbler kit with a HC-SR04 ultrasound module. The circuit works fine (I can trigger and read the echo back) but it doesn't seem to be ...
13
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1answer
427 views
Circuit to safely power-down Pi
I want to use my Pi as an XBMC server in the car. The XBMC docs say that you should always use the shutdown command before disconnecting the power.
I've been thinking that it should be possible to ...
3
votes
3answers
119 views
Electronics manual for noobs
In my faculty course I didn't have any introduction to electronics... just programming. So I want to start small thinks with the GPIO of the raspberry pi but I even to plug a simple led is not ...
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2answers
135 views
Need help with (ambitious?) project
I gave up on using my Pi as a VPN'd NAS, since the CPU is too slow to handle OpenVPN (see here Low bandwidth internet over VPN).
So I want to set it up to do (all of) the following:
Control a light ...
3
votes
2answers
232 views
Using RasPi to send signal, for locking / unlocking alarm clock?
I'm totally new to electronic/hardware/interfaces/GPIO sort of thing, but I have a project in mind. My house has an alarm system, which can be unlocked by key, with buttons. The alarm system gives a ...
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2answers
46 views
eda tool to validate basic circuits [closed]
I am new to electronics but am a hobbyist. I plan to use the GPIO headers on RPi to drive simple circuits. I would prefer to design simple circuits on some eda tool but also validate them. That will ...
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3answers
706 views
How can i turn an GPIO to its alternate function?
I want to use the altenate function of GPIO 4 namely the GPCLK0 function.
How can one set a GPIO to its alternate function? Many alternate functions are summarized here: elinux-wiki
The best would ...
3
votes
3answers
594 views
How to turn on a high current electrical device? (water heater)
I am looking into a project to measure the temperature inside a water heater and turning it on based on: time, temp, etc.
I am only on the theoretical phase since I am not sure it is possible.
I ...
16
votes
3answers
5k views
Using Raspberry Pi without a Linux OS?
I'm interested in using the Raspberry Pi as a pure embedded CPU unit, for the development of embedded applications. Since the Raspberry Pi has a powerful CPU with quite a bit of memory, it makes an ...
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votes
4answers
456 views
Is it possible to use the GPIO to program a PIC?
I'm referring to the PIC microcontrollers, specifically the 16f and 18f series - could the GPIO be used in this way?
If so, how?
