Pages: [1] 2   Go Down
Author Topic: Diode selection  (Read 2805 times)
0 Members and 1 Guest are viewing this topic.
Ohio
Offline Offline
Full Member
***
Karma: 0
Posts: 227
Arduino Hexapod
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

What do I order and from where?
My search on diode selection turned up a lot of discussions on projects with vastly different requirements.

So, I want to try reading in multiple RC receiver channels on one pin.
I saw somewhere that using diodes, I can take the odd number channels and put then on one pin and read the pulse duration, and the gaps between pulse being the duration of the even channels.
What diodes should I get for this?
I must say that I do not even know what characteristics describe diodes.

I went to Digikey and searched on diode and there were a zillion hits.

This is a simple diagram of what I am thinking.


So, any recommendations on diodes and I guess the resistor would be helpful.
Thanks!
Logged

Left Coast, CA (USA)
Offline Offline
Brattain Member
*****
Karma: 361
Posts: 17292
Measurement changes behavior
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

That is a super non-critical diode application. Nearly any silicon diode would work. A 1N4001 should be easy to find although one certainly doesn't require the 1 amp rating they come with, but they are useful to have around. A 10k ohm resistor should work fine also.

Lefty
Logged

0
Offline Offline
Edison Member
*
Karma: 0
Posts: 1103
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

99% of all people use in 99% of all cases a 1n4148 or a 1n4004.

The issue is that the leads of the 4148 are too thin and of the 4004 (1 ampere!) too thick for the use in a breadboard :-)
Logged

Left Coast, CA (USA)
Offline Offline
Brattain Member
*****
Karma: 361
Posts: 17292
Measurement changes behavior
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
99% of all people use in 99% of all cases a 1n4148 or a 1n4004.

Yea. and 50% of baseball is 90% mental.  smiley-wink

And the remaining of us 1% use what we have on hand that will work.

Lefty
« Last Edit: August 26, 2010, 04:25:34 pm by retrolefty » Logged

0
Offline Offline
Tesla Member
***
Karma: 141
Posts: 9541
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Go to Radio Shack and get the 50 pack of small signal diodes for $2.49 and start testing.
Logged

Consider the daffodil. And while you're doing that, I'll be over here, looking through your stuff.   smiley-cool

Manchester (England England)
Online Online
Brattain Member
*****
Karma: 618
Posts: 33952
Solder is electric glue
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
Yea. and 50% of baseball is 90% mental.

Did you know that 83.296% of all statistics are made up?
Logged

CT, USA
Offline Offline
Sr. Member
****
Karma: 3
Posts: 446
Arduino rocks
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
Did you know that 83.296% of all statistics are made up?

I am 99.173% sure about that smiley
Logged

S.Carolina USA
Offline Offline
Newbie
*
Karma: 0
Posts: 16
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

7/5th of all people do not understand fractions! :-?
Logged

Ohio
Offline Offline
Full Member
***
Karma: 0
Posts: 227
Arduino Hexapod
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

10 kinds of people in the world
Those who understand binary and those who don't
Logged

Ohio
Offline Offline
Full Member
***
Karma: 0
Posts: 227
Arduino Hexapod
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Logged

S.Carolina USA
Offline Offline
Newbie
*
Karma: 0
Posts: 16
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

If only dead people understand hexadecimal, how many people understand hexadecimal?

I have no friends. :'(
« Last Edit: August 27, 2010, 04:10:50 pm by jerryb » Logged

Seattle, WA USA
Offline Offline
Brattain Member
*****
Karma: 610
Posts: 49034
Seattle, WA USA
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
how many people understand hexadecimal?
Anyone that can count to 16 on one hand... smiley
Logged

SW Scotland
Offline Offline
Edison Member
*
Karma: 17
Posts: 1383
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

It's a fact that most of us have more than the average number of legs !
Logged

0
Offline Offline
Edison Member
*
Karma: 0
Posts: 1103
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Back to the topic:
How many people understand tunnel diodes?
Logged

Nowhere
Offline Offline
God Member
*****
Karma: 3
Posts: 852
|-\ |\|\
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Back off topic:  (I can't resist a cheesy joke)


Many mathmaticians get halloween and christmas confused.







(31 OCT == 25 DEC) ;D





Logged

Soundcloud page: http://soundcloud.com/beefinator-2
Youtube channel: http://www.youtube.com/user/beefinator14
Old soundcloud page (ran out o

Pages: [1] 2   Go Up
Jump to: