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Topic: Need Suggestion Common Parts for Arduino Projects (Read 13149 times) previous topic - next topic



I'm quite new with Arduino and now I plan to build a small parts inventory of most commonly used components (resistors, diodes, transistor etc) in novice to medium level Arduino Projects

and here is my (incomplete) list: http://goo.gl/Pz3op

any inputs or other suggestion?



other suggestion?

Can I assume you already own a digital multimeter? If not, that should be the first item on your list.


Coding Badly


@retrolefty: owned already along with, heat gun and  regulated 0-12V DC powersupply  :)

@Coding Badly: thanks, will put it on my shopping list ...


A bunch of different coloured LEDs

DIL sockets if you're not breadboarding...


A motor Driver Ic and a Couple of motors ?  ;)


Jan 13, 2011, 05:23 pm Last Edit: Jan 13, 2011, 05:24 pm by Chuckz Reason: 1

How much do you need to use your multimeter for?  What do you check?



I would skip the 74LS47 and go with shift registers that can drive LEDs directly, like TI's tpic6b595 open drain shift register. Can drive columns of LEDs if needed, or single  segments of 7-segment displays. The 74LS47 offers no storage capability, so you have to put the data into something for it to decode anyway. Why not go direct? Then you also have the capability to do more than just 0-9 and odd shapes it uses for ABCDEF - you can define your own A, b, c, d, E, F and L, P, r, h, g, J, etc.  
I've also been using a good old octal latch like the 74F374 as shift register, display flickers a little while loading, but it suffices for my needs.
Did you hve shift-in registers listed too?
I would get extra on the LED current limit resistors too.
Pushbutton switches. 3x4, 4x4 Keypad. (can get a 4x5 for $1 from http://www.surplussales.com in Nebraska!)
Depending on how big your project gets, wirewrapping could be considered vs point to point soldering too. wirewrap sockets are nice to build with.
Some generic diodes like 1N4007.
If you are driving lots of digits, then some multiplex control chips from MAXIM are also nice, like the MAX7221 to control 8 digits via SPI interface.
I wouldn't worry too much about general parts - get parts for a specific project, but get a few extra each time.
I would also recommend an oscilloscope, such as the $89 kit from www.dpscope.com, or download a soundcard scope like Virtual Analyzer. Good for checking out things like PWM, often times a multimeter just can't show you what's really going on.
And a couple of boxes to mount things in. I have been using Really Useful Boxes (found at Staples, Office Max, online). Pretty low cost, easy to drill for mounting connectors & stuff.
Also a couple pieces of "island of holes" PCB like velleman ECS1/2 for building up on after getting things working on solderless breadboard.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.


I'd also change the number of 2n2222 and 2n3906 transistors you have listed; right now you have 5 each - instead, get an even number of each, because if you want to make h-bridges, it takes 2 of each (then again, if you were making small push-pull audio amplifiers, it would take one of each).

/maybe I just like even numbers :-?
I will not respond to Arduino help PM's from random forum users; if you have such a question, start a new topic thread.


How much do you need to use your multimeter for?  What do you check?

I use a meter constantly when I'm dealing with external components I'm wiring to an Arduino:

I measure resistors to make sure they are the value I think they are.

I check diodes and transistors to see if you aren't damaged before I try and use them, and that I'm correct in identifying device terminals.

I measure current actually being drawn by loads like relay coils, solenoids, motors, leds, etc, etc.

I measure voltage being supplied to the arduino board.

I read the actual voltage value of digital input and output pins.

The list goes on and on. The bottom line is that a digital multimeter is a basic requirement for anyone that is wiring stuff to an Arduino. It's as much an educational tool as it is a tool to help limit damage and help troubleshoot circuits that aren't operating as intended. If you aren't using a multimeter then you are working in the blind.



Thanks for your inputs guys, capacitors, diodes, transistor amount, motor controller transistor, LEDs and I still prefer to keep 74LS47,74LS48 along with 595s and 164s shift registers, for very beginner user purposes.

Still out from my list keypads, LCDs, motors, relays ...

Here is the update http://goo.gl/Pz3op

More inputs still welcome, I believe the list is still grow and hope this will give a good clue for Arduino and Electronics hobbyst beginners, what they should prepare to start playing around with Arduino.


I tried to look at your list and got this error from google :(

We're sorry.

The publishing options given are not valid. Please check the options and try again.

Find out more at the Google Docs Help Center.


This is a very cool list as I am looking at buying a blanket set of parts as selected from a online shop. I shall wait a while longer then use the list.

This is a cool idea...thanks for sharing senopati  :)
"The really amazing thing is how many people are successful with their Arduino projects considering the fact that so many of them do not have a technical background.  A lot of them seem to try, and succeed with, projects that no sane engineer would even attempt." - floresta commenting on the proper use of LCD displays


YES ! as a beginner myself, I study all day long, and then, when I
think I know the Ebers-Moll transistor model and I need one
with characteristic xyz, it all boils down to
"What is the right choice for this ?".
and the answer is "99% of all cases just use the bog-standard BC547"
(or 2n2222, or whatever)

I would very much like a list of "normal", a bit up-to-date, and above all obtainable suggestions, for
transistors, power transistors, jfet, enhancement fet, power mosfet,
signal diode, protection diode, audio range op-amp, high freq op-amp,
comparator, and maybe a few often occurring digital chips...

maybe you can put your list in the playground, and we can all enhance it.

Thx !

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