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Re: [LUG] Pi Output Box

To: list@xxxxxxxxxxxxx
Subject: Re: [LUG] Pi Output Box
From: Peter Lloyd-Jones <peter@xxxxxxxxxxxxxxxxxxxx>
Date: Sun, 3 Jun 2012 13:00:54 +0100
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On 2 June 2012 22:11, Gordon Henderson <gordon+lug@xxxxxxxxxx> wrote:

On Sat, 2 Jun 2012, Peter Lloyd-Jones wrote:

Make something idiot proof and you'll just find a better class of idiot ;-)

I resemble that remark!

Not only that I am showing my age. Having looked at the GPIO I thought "this is a job for a 8255", this would give one 24 lines and are (were) very cheap, however I do not think they make them any longer :(

However I have stumbled across an old circuit using 74LS151,138s 74154s and 7404 which should give 128 ins and 128 outs! (It was for the BBC user port which had 10 lines.)

All the best

Peter L-J

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Follow-up: Re: [LUG] Pi Output Box
- From: Mark Evans

References:
- [LUG] Pi Output Box
  - From: Peter Lloyd-Jones
- Re: [LUG] Pi Output Box
  - From: Mark Evans
- Re: [LUG] Pi Output Box
  - From: Peter Lloyd-Jones
- Re: [LUG] Pi Output Box
  - From: Gordon Henderson

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