User avatar
fos
Posts: 104
Joined: Wed Nov 16, 2011 1:48 am
Location: Texas & Kansas, United States
Contact: Website

Improved parts in RS kit?

Sun Oct 14, 2012 2:03 am

I read somewhere in the past that the RS version of the Gertboard kit included a couple of improved spec parts. Does anyone recall what those parts were? (I would order from RS if they shipped to the US.)

I would like to use the improved parts once I receive my kit.

Thanks, Jeff
https://faroutscience.com

jamesh
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 23965
Joined: Sat Jul 30, 2011 7:41 pm

Re: Improved parts in RS kit?

Sun Oct 14, 2012 6:45 am

RS do not distribute the Gertboard - that's Farnell. Tandy HAVE supplied some after getting hold of some bare PCB's. Maybe it's Tandy you are thinking of?
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
Contrary to popular belief, humorous signatures are allowed. Here's an example...
“I think it’s wrong that only one company makes the game Monopoly.” – Steven Wright

User avatar
Grumpy Mike
Posts: 914
Joined: Sat Sep 10, 2011 7:49 pm
Location: Manchester (England England)
Contact: Website

Re: Improved parts in RS kit?

Sun Oct 14, 2012 12:09 pm

In the U.S.A. Radio Shack or RS is is what we in the UK know as Tandy.
In the U.K. the company Radio Spares is known as RS and they also distributed the Raspberry Pi.

I think this is the root of the confusion. Sorry but I know nothing about the components, my Gert Board has been dispatched from Farnell and I am expecting it tomorrow. :)

User avatar
fos
Posts: 104
Joined: Wed Nov 16, 2011 1:48 am
Location: Texas & Kansas, United States
Contact: Website

Re: Improved parts in RS kit?

Sun Oct 14, 2012 4:45 pm

I was thinking of Tandy in the UK for the Gertboards that shipped early. I'll go back and check through the posts. I may be mistaken.

Thanks, Jeff
https://faroutscience.com

el10t
Posts: 24
Joined: Wed Aug 22, 2012 2:04 pm

Re: Improved parts in RS kit?

Sun Oct 14, 2012 4:57 pm

According to Tandy elsewhere in this forum it's the IC sockets:

"The Gertboard Deluxe Kit for £29.99 is a full Gertboard kit containing all of the components you would get from Farnell with some of the standard IC sockets replaced with higher quality turned-pin sockets."

MarkDavies
Posts: 7
Joined: Mon Jul 30, 2012 11:56 pm

Re: Improved parts in RS kit?

Tue Oct 16, 2012 7:36 am

I assembled the Farnell kit last night (see image at http://www.marksbits.co.uk/Raspi/2012/1 ... assembled/)
Found all the parts were fine, had no troubles with the switches or IC's.

User avatar
fos
Posts: 104
Joined: Wed Nov 16, 2011 1:48 am
Location: Texas & Kansas, United States
Contact: Website

Re: Improved parts in RS kit?

Mon Oct 22, 2012 12:33 pm

These are the upgraded parts mentioned in another thread by Tandy:

All pin headers are gold plated and pre-cut to size.
IC sockets are all higher qulaity turned pin sockets.
Buffer ICs are more expensive 74AC244.

fos
https://faroutscience.com

User avatar
Grumpy Mike
Posts: 914
Joined: Sat Sep 10, 2011 7:49 pm
Location: Manchester (England England)
Contact: Website

Re: Improved parts in RS kit?

Tue Oct 23, 2012 11:18 am

IC sockets are all higher qulaity turned pin sockets.
I just don't get the turned pin socket thing, I have avoided them as they mess up the legs on the IC and make them only usable in other turned pin sockets.
I like the ones Farnell supplied and I would use them over turned pin any day.

paultnl
Posts: 103
Joined: Fri Oct 12, 2012 6:25 pm
Location: Cambridge

Re: Improved parts in RS kit?

Tue Oct 23, 2012 12:04 pm

Turned pins make a better electrical connection or so it is claimed.
I don't like Russian dolls, they are so full of themselves

User avatar
alexeames
Forum Moderator
Forum Moderator
Posts: 2869
Joined: Sat Mar 03, 2012 11:57 am
Location: UK
Contact: Website

Re: Improved parts in RS kit?

Tue Oct 23, 2012 12:24 pm

paultnl wrote:Turned pins make a better electrical connection or so it is claimed.
If you turn them too many times they come off :lol:
(I'll get my coat)
Alex Eames RasPi.TV, RasP.iO

User avatar
fos
Posts: 104
Joined: Wed Nov 16, 2011 1:48 am
Location: Texas & Kansas, United States
Contact: Website

Re: Improved parts in RS kit?

Tue Oct 23, 2012 2:20 pm

In the early days of integrated circuits (and semiconductors in general), sockets were used so the part could be changed easily. This was also true with vacuum tubes prior to the solid state age. (Anyone else remember those days?) ;)

With the early personal computers we used ram chips by the dozen and they frequently failed. When trouble shooting, it was quick to run your finger over a bank of ram to determine the hot one. Frequently when that one was changed out it would solve the problem.

During those days it was also a good idea to leave equipment turned on since the heating and cooling cycle could cause integrated circuits to climb out of their sockets causing hard to find connection problems.

Due to the high reliability of today's devices you rarely see sockets used in commercial devices. Even with high quality kits such as those from Elecraft you rarely see sockets.

When used, sockets of the best quality that hold the device securely are the best option. The cheap ones that just have friction clips along the sides of the pins are a poor gamble. With digital devices, any poor connection can generate static that can seem like on/off pulses.

fos
https://faroutscience.com

User avatar
Grumpy Mike
Posts: 914
Joined: Sat Sep 10, 2011 7:49 pm
Location: Manchester (England England)
Contact: Website

Re: Improved parts in RS kit?

Tue Oct 23, 2012 4:57 pm

The cheap ones that just have friction clips along the sides of the pins are a poor gamble.
No they are not.
I make a lot of stuff and I always use sockets and I have never had any trouble with reliability of stuff due to the sockets. I made a radio repeater logic box that operated 24 / 7 for 20 years before they decided to replace it.

Commercial designs do not use sockets because they are not necessary once you have established that a circuit works and they add unnecessary expense.
Turned pins do mangle your chips and the few I have in my stock box were ones I replaced with proper ones from kits. I only use them in emergencies, that is when I have to have a socket and I have run out of real ones.

This is my experience not theory.

User avatar
fos
Posts: 104
Joined: Wed Nov 16, 2011 1:48 am
Location: Texas & Kansas, United States
Contact: Website

Re: Improved parts in RS kit?

Tue Oct 23, 2012 5:18 pm

I base mine on experience as well.

YMMV

72 de Jeff WD4ET
https://faroutscience.com

User avatar
Grumpy Mike
Posts: 914
Joined: Sat Sep 10, 2011 7:49 pm
Location: Manchester (England England)
Contact: Website

Re: Improved parts in RS kit?

Wed Oct 24, 2012 1:01 pm

fos wrote:72 de Jeff WD4ET
Well nothing QRP from me

73 de G8HBR

Return to “HATs and other add-ons”