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PiFace and Gertboard

Posted: Mon Nov 12, 2012 5:22 pm
by RaTTuS

Re: PiFace and Gertboard

Posted: Mon Nov 12, 2012 7:14 pm
by JohnCrow
Hmm I have a few thoughts about this.

1) Ok The photo is not very clear but It looks like the IC's are soldered into the PCB.
The idea of the buffer chips is to protect the RPi. If you blow them on the kit version it just a case of unplug it and stick a new one in. A soldered IC is quite difficult to remove without damaging the PCB for a beginner.

2) I'm not an expert on EU laws but as this is a complete board, I would expect it to need to be CE marked (Like the RPi). (Kits i believe are exempt)

3.)It should be tested so it will work out the box. Maybe this is better for the novice (Soldering the SMDs may but some people off, but the ideas of building your own may get the person into building other projects)

Re: PiFace and Gertboard

Posted: Mon Nov 12, 2012 8:59 pm
by Gert van Loo
It is a bit more difficult then with sockets but the price is lower.
Also to replace one of these the solution is to cut of all pins then remove the remains.
Next solder in a new chip. Do NOT try to remove the chips as a whole.
It is worth about 0.50 so not worth the trouble.

Re: PiFace and Gertboard

Posted: Tue Nov 13, 2012 10:09 am
by poglad
Or, next solder in a socket. If you've blown one chip you might blow another!

Re: PiFace and Gertboard

Posted: Tue Nov 13, 2012 11:18 am
by alexeames
poglad wrote:Or, next solder in a socket. If you've blown one chip you might blow another!
LOL - that was my thought too. Although, I haven't looked at the data sheets, the buffer coped better with me trying to put +5V to ground than the reversed-polarity servo which let the smoke out and burnt a hole in it. I would be concerned about destroying the buffer chip while soldering it in. But you might have to modify the socket to get it to sit properly on the board?