Standalone Arduino

Other Hardware 3rd Party Boards
1

Hi, I'm building this:

And here it states: Add a 16 MHz external clock between pin 9 and 10, and add two 22 pF capacitors running to ground from each of those pins.

I only have capacitors with the marking: 221 will that be good enough?

Thanks,

Cameron.

2

No, you need 220, i.e. 22pF

3

Thank you for your help :slight_smile: I trip to radio shack tomorrow

4

Browse www.dipmicro.com, stock up on 100nf/0.1uF, 22pF, 16 MHz crystals, 10K resistors, etc. Save you some money in the long run.

5

Thanks, CrossRoads,

That's pretty cheap! In RadioShack, and even DigiKey that stuff is expensive.

6

Digikey is not expensive - can just be hard to locate.
All are inexpensive compared to Radio Shack - unless you buy just 1 and add in shipping.
I typically get a bunch of stuff, spread the shipping costs out over many parts.
Compare:
http://www.dipmicro.com/store/index.php?act=viewProd&productCode=XC7-16000
28 cents

33 cents

10 cents

35 cents (Frequency & Timing Devices - certainly not as easy to locate as the others)

I don't even see crystals.

7

I once spent $26 at taydaelectronics - caps, resistors, crystals, pots, knobs, buttons, connectors, ICs, sockets - huge bag of stuff arrived (from Colorada!), for like $8 in shipping. I am still building that stuff into projects.

8

connect 10 220pF capacitors in series you get a 22pF.
just like connecting 10 2.2k ohm resistor in parallel you get 220 ohm.

9

Not very convenient tho ...