pepeganda
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Best manners with the breadboarding ??

Wed Jul 17, 2019 4:11 pm

Hello, iot just picked my interest and as a first step to discover it i decided to study development cards first, soo its my first time using a development card like arduino or raspberry, and i want to make sure i don't roast every card i use, so i want to ask you guys some questions you probably have the answer for :D , i would really be happy if i get an answer to every question :
1 . Can i really kill my raspberry pi with just a static discharge if i touch it ?
2 . Is it normal if i change or remove jumper wires when my raspberry pi is running in those 2 situations ?
a . not running a script / just power supplied .
b . running a python script.
3 . is it fine to add or remove components in the breadboard while the pi is running ?
4 . is it fine to run a script when no breadboard is connected ?
Thanks alot, every bit of help is appreciated

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mahjongg
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Re: Best manners with the breadboarding ??

Wed Jul 17, 2019 9:43 pm

The six things that can destroy your PI:
https://www.raspberrypi.org/forums/view ... 1#p1467093

pcmanbob
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Re: Best manners with the breadboarding ??

Wed Jul 17, 2019 10:08 pm

I would not advise making connections to the pi gpio while it's powered, nor would I make changes to components on a breadboard while powered.

There is no problem running a script if your pi is not connected to the breadboard , but you may find your code does not work correctly.
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davidcoton
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Re: Best manners with the breadboarding ??

Wed Jul 17, 2019 11:25 pm

  1. Possible but unlikely. Avoid very dry conditions and nylon carpets and clothes.
  2. Do not move wires without shutting down and disconnecting power.
  3. No.
  4. Yes.
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pepeganda
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Re: Best manners with the breadboarding ??

Thu Jul 18, 2019 9:08 am

thank you a lot for the answers !! :D

id like to know too, why is it normal to run a script when no pin is occupied i mean is there no risk when an output pin is emitting 5v to the void/air , and should i make pull up/down resistor for each input pin ?

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mahjongg
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Re: Best manners with the breadboarding ??

Thu Jul 18, 2019 9:36 am

GPIO's output 3V3 (3.3V) (or 0V) NOT 5V (GPIO's are NOT 5V tolerant).

if you output (ether a 1 or a 0) to an unconnected GPIO simply nothing will happen.

If you do not read out a GPIO input, (or have interrupts enabled on the GPIO) the state of the input is unimportant.
Otherwise I would turn on a soft pullup.
That said soft pull ups are weak (50K) and a long lead connected to one can and will pickup electromagnetic interference (noise).

the two very worst things you can do is connecting two GPIO's together, shorting a GPIO to either 0V or 3V3, and putting a voltage > 4V on a GPIO.

pcmanbob
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Re: Best manners with the breadboarding ??

Thu Jul 18, 2019 9:39 am

pepeganda wrote:
Thu Jul 18, 2019 9:08 am
thank you a lot for the answers !! :D

id like to know too, why is it normal to run a script when no pin is occupied i mean is there no risk when an output pin is emitting 5v to the void/air , and should i make pull up/down resistor for each input pin ?
First off the gpio is 3.3v not 5v.

if there is nothing connected to the gpio pin except the air , then no current can flow , yes the pin can go high to 3.3v but with nothing connected it will do nothing.

there is no need to put a pull up/down resistor on unused pins, all pins at boot are input unless you have set them other wise and it does not cause any problems.
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boyoh
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Re: Best manners with the breadboarding ??

Thu Jul 18, 2019 8:28 pm

It is best for the forum to know the age
of who we are dealing with, this makes easier to answer the post. First the
RaspberryPi is not plug and play the GPIO
Pins must be treated with care, and to know
How to Interface them with the project and
Breadboard, A basic understanding of basic
Electronics is worth understanding, Learning programming is great, but it is
Only useful if it as something to do and
Control, It is common sense not to work
On circuits with the power on only if you
Know what you are doing,
Regards BoyOh
BoyOh ( Selby, North Yorkshire.UK)
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LTolledo
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Re: Best manners with the breadboarding ??

Thu Jul 18, 2019 9:47 pm

one good point to remember is that

Breadboards, when powered on is not plug and play

one wrong move, then... somewhere on the breadboard, or something connected to the breadboard goes "pffft" (sometimes with matching "magic smoke" effect).

RPi's GPIO are also not plug and play, same thing as stated above applies to the RPi

better get good supervision on your first few breadboard attempts..... to get a good feel on how to properly use and enjoy the breadboards...
"Don't come to me with 'issues' for I don't know how to deal with those
Come to me with 'problems' and I'll help you find solutions"

Some people be like:
"Help me! Am drowning! But dont you dare touch me nor come near me!"

pcmanbob
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Re: Best manners with the breadboarding ??

Fri Jul 19, 2019 7:07 am

If you are new to both the pi and breadboards then may be these will help

how to use a breadboard : https://learn.sparkfun.com/tutorials/ho ... breadboard

the physical computing guide that has lots of examples of connecting the pi to the breadboard : https://projects.raspberrypi.org/en/pro ... -computing

Simple rules to follow

1. always make or break connections to pi or on breadboard with all power off
2. check you work carefully more than once before powering on
3. if you are not 100% sure that what you are connecting to a gpio pin is not more than 3.3v then power the circuit with it not connected to the pi and test the output with a volt meter
4. if you are not sure seek advice even if its posting pictures/diagrams on this forum and asking for help.
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