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Topic: Making a Digikey order; Any suggestions? (Read 2299 times) previous topic - next topic

TchnclFl

Well, I'm putting together an order at Digikey for some stuff I need, and I was wondering if anyone had some suggestions for components to add to my list.

I figured that if I'm going to eventually need something, I might as well add it now and save on shipping.

So far I've got:

  • Momentary Push buttons
  • 16 MHz resonators
  • 5V regulators
  • Decoupling caps for the regulators
  • 2.1mm power jacks


Anything else I should add? :)

jezuz

Depends on what floats your boat... maybe a bunch of led's? Some breadboards? Tools perhaps?

TchnclFl

I've got 100+ LEDs, don't need breadboards, and I think I'm set on tools.

I was thinking mostly discreet components?

cr0sh

Get a mess of NPN 2n2222 transistors? Maybe a good set of resistors and capacitors in different common values? Potentiometers? MOSFETs for motor control? ULN200x motor drivers and darlingtons? 4051s? A complete 74xx kit (that would be kinda expensive)?

So many choices...

:)
I will not respond to Arduino help PM's from random forum users; if you have such a question, start a new topic thread.

TchnclFl

I do already have about 30 PN2222s, and many resistors in common values.

I may place some caps in the cart.

I have a few pots, but I could use some MOSFETs!  Anyone have a good part number for MOSFETs?

KenH

Depending on what you plan for the MOSFETs - I sorta like P type - 785-1106-1-ND is a decent 25amp...  wait - I'll bet you are looked for leaded items - TO-220?  That is a TO-252.  How about a FQP27P06-ND at $1.06 each if you are needing 27 amps?

One I've been looking at is IRF4905PBF-ND at 74 amps - but it's $2.81 each from Digikey - I'm thinking of ordering some on my next order to Futurlec - only $1.25 there.

Do you have a complementary for the 2N2222?  Diodes?

A couple extra m168 chips?  DigiKey won't have an m328 chips until March 22th.

Any temperature sensors?

Ken H>

Ran Talbott

Most of those parts are available cheaper surplus.  Except for the resonators,  which I've never had any luck with.

Check out bgmicro.com:  you may save enough to make it worth the extra postage.  Be warned that,  if you're shopping for panel mount power jacks,  the ones BG Micro sells are serviceable,  but visibly more cheaply made than the higher-priced ones.

If you do wind up ordering from Digi-key,  consider getting some of the chips that are popular in Arduino projects,  but really hard to find from other hobbyist sources.  Like the TPIC6C595 or TLC5940.  In addition to using them,  yourself,  you might swap a few with folks who want only one or two,  and find Digi-Key's minimum shipping charge painful.

Digi-key has some great deals on mounting hardware,  like bags of 4-40 nuts and screws.  And these spacers are really nice:  run a 4-40 tap through one,  and you get a threaded spacer for a fraction of the price of ready-made ones.

KenH

Quote
Digi-Key's minimum shipping charge painful
??? I've ordered quite a few times from Digikey and never had a min shipping charge - usually shipping for a few chips and things run less than $3 - $4 at max.  Only one time did I get hung with shipping charges - I order some 4 ft pieces of heat shrink - they shipped in a BIG long box so the heat trace would not get bent or rolled up.  That cost me $9 for priority shipped - Of course I rolled it up in a storage box at home.

Mouser is the one with heavy shipping - seems like it's $7 or $8 min.

BTW, I had not though of DigiKey for 4-40 nuts 'n screws - and those spacers.  You just cost me more money :)

Ken H>

bill2009

I like having a couple of atmega and attiny chips around to make custom circuits with.

TchnclFl

Well, I just ordered some ATmega644s from ebay (hence the reason I'm ordering things like resonators, etc.) so I think I'm good on chips for now (plus I have no idea how to program Attiny chips anyways) ;D.

TchnclFl

#10
Feb 21, 2010, 02:50 am Last Edit: Feb 21, 2010, 03:00 am by Tchnclfl Reason: 1
Looking at other ICs, I thought about buying one or two DS1307s, but 4 bucks seems like a lot to pay for something I have no current use for!  Plus I'd have to get a batter + holder + crystal..

Are there any cheaper (Arduino compatible) RTCs available?

PS:  What's the difference between DS1307 and DS1337 besides the price?  They're both listed as I2C, but I swear one of them was SPI..

Ah, I think I've figured it out:  DS1307 has no battery backup, but has alarms?

dts

As far as Mosfet's I just ordered some from Newark for $0.76 each.  I have used them before and I like the 150 Watt rating plus the low 'on' resistance rating.  I'm a newbie here and just starting with the Arduino micros but think these look good.  

Dave Stalsworth

Here are the Specs...

VISHAY SILICONIX
IRFZ44RPBF

MOSFET; Transistor Polarity:N Channel; Continuous Drain Current, Id:50A; Drain Source Voltage, Vds:60V; On Resistance, Rds(on):0.028ohm; Rds(on) Test Voltage, Vgs:10V; Threshold Voltage, Vgs Typ:4V; Power Dissipation, Pd:150W ;RoHS Compliant: Yes

TchnclFl

Aw man, those are 2.88 each at Digikey!

http://search.digikey.com/scripts/DkSearch/dksus.dll?WT.z_header=search_go&lang=en&site=us&keywords=IRFZ44RPBF+&x=0&y=0

Osgeld

proto board, or blank pcb stock (and etching materials)
http://arduino.cc/forum/index.php?action=unread;boards=2,3,4,5,67,6,7,8,9,10,11,66,12,13,15,14,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,86,87,89,1;ALL

TchnclFl

I don't have a laser printer :(.

Could be nice to have some protoboard though...

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