Show Posts
Pages: 1 2 3 [4] 5 6 ... 97
46  Community / Bar Sport / Re: Saving my Diecimila EEPROM on: February 05, 2014, 03:26:48 pm

Quote
I extended part of its life by using the 'wear leveling' technique

How did you do that if you don't have the sketch ?
47  Community / Bar Sport / Re: Various items of interest on: February 03, 2014, 10:03:13 pm
Thats very interesting about Digikey.

Ten years ago we lived at the southermost tip of Africa in a little village called L'Agulhas, where the Atlantic and Indian Oceans meet  ( we now live in Cape Town 250 kM NW of there)    It was 93 km down a dead end road off of nearest highway.

RS Components had a deal with a national courier company where they paid a flat rate to deliver anywhere in South Africa, even if it was next door to the warehouse in Cape Town.

I ordered a tiny nylon gear wheel from them and I said they could post it, but the lady said no, we courier everything, so fair enough next day a van drove 250km to the end of Africa with my little gear wheel.

I was reluctant to order again, but when I did the same guy in a van bought the parcel, but this time it was late afternoon, and he had a fishing rod on the roof !    He slept in the van overnight and drove home at first light.
48  Community / Bar Sport / Re: A broken Arduino... on: February 03, 2014, 08:33:55 pm
Gone to Italy to meet its maker ?
49  Community / Bar Sport / Re: A broken Arduino... on: February 02, 2014, 07:00:49 pm
Mony Pythons dead parrot sketch could give some ideas :-)

An exArduino,   or perhaps its not dead, just resting after a particularly long download .....
50  Community / Bar Sport / Re: Lifes little arduino mysteries on: January 26, 2014, 08:56:28 am
I shouldnt worry with the ZIF Paul, as I say my normal original type sockets have withstood over 1000 chip insertions,  just file a bit of plastic away on the socket under one end of the chip so you can get a small screwdriver in to lift it,and no problem.
51  Community / Bar Sport / Re: Lifes little arduino mysteries on: January 26, 2014, 04:34:03 am
"It's not like we shut up shop for Xmas/new year...oh hang on."

We havnt for 7 years now, but this morning we decided we will shut shop this year for a couple of weeks next Christmas  for a holiday.

It will have to be in the summer Xmas holidays to be able to spend time with the family,  but Cape Town gets chock a block full with tourists at that time ( bless them ) so we will have to join in with the masses :-)

I have just started using 5x7 matrix for the team names.  which could be 8x8 of course .
I am using the MAX7219 chips, which I was hoping to daisychain for more than 8 chips per chain,  it looked like its possible, but no data comes out of the 8th chip,  I have no time to experiment further , so I am driving each chain with a separate  load / latch/ CS pin whatever you want to call it :-)

What chips are you planning to use on your 65,000  LED display Rob ?


John
52  Community / Bar Sport / Re: Lifes little arduino mysteries on: January 26, 2014, 03:08:31 am
Thats true, it might be there is a better contact when not disturbed.
53  Community / Bar Sport / Re: Happy Australia Day on: January 26, 2014, 02:39:23 am
Arise Australia fair .
54  Community / Bar Sport / Re: Lifes little arduino mysteries on: January 25, 2014, 10:23:32 pm
Hi Rob,

I havnt had a chance to get on the forum, its been 18 hour days for months, but now I am getting smarter, and subcontracting the benchwork. ( its taken a long time to learn this ! )
I have some new designs I want to build a stock of, its quite exciting.

I have written some code for saving a library of  110 team names , and 20 age groups, in the 328s EEPROM.
The user can scroll through their previously typed in teamnames ( or enter a new one )  it will wrap around when full and overwrite the oldest )
Only after I worked out how to get it to save the name in the next empty byte, and save the address of the next empty byte , did I realise that I had made a little File Allocation Table , and I understand much better how it works :-)

I have 9 scoreboards and one telemetry unit that I should have finished already, but the Chinese New Year is messing me around with pcbs and LEDs  :-(

Back to the grindstone its 5-30 Sun morning and I need to finish some code and get a bit of shuteye !
55  Community / Bar Sport / Re: cast the line with no bytes on: January 25, 2014, 10:33:43 am
cast the line with no bytes      sounds like one of my fishing expeditions  ...
56  Community / Bar Sport / Re: Lifes little arduino mysteries on: January 25, 2014, 10:26:48 am
I made a little standalone board a couple of years ago, that I use in loads of projects :-



Here is todays in a hand held remote, sending data from 6 binary coded switches and 5 push buttons.
As I say I wish I had put a ISP socket on the board !

I will redesign it one day, but it is just so cheap and easy to order another 10 little boards without setup charges .

And I have no need for ZIF sockets when these cheap sockets in my arduiono boards have handled probably 1000 insertion/removals ( I make lots of corrections each project ! )

57  Community / Bar Sport / Re: Lifes little arduino mysteries on: January 25, 2014, 09:53:43 am
when I was 61, I could turn my birthday cards upside down on the shelf, and feel 19 again, it doesn't work so well at 66  !
58  Community / Bar Sport / Re: Lifes little arduino mysteries on: January 25, 2014, 09:14:21 am
The trouble is Jack, I havn't had chance to really document it, it might be a lot to do with fatigue, but I normally leave the avrdude config file at whatever worked last,  and then it tells me it expects the other.  And I am buying from the same supplier ....
Its not a train smash, but every time I have to bootload another tube of chips I get confused .  ( I was 66 yesterday so not too surprising :-) )

I am surprised with the cheapy IC sockets outperforming the others though.

PS  I have considered changing supplier, but this local one  supplies for about $US 3 , which I cant match elsewhere.
59  Community / Bar Sport / Lifes little arduino mysteries on: January 25, 2014, 08:52:35 am
I have just had to load the bootloader onto 20 blank P-UP chips that I embed in my projectts.

Sometimes it likes the IE 95 0F  in the signature, and sometimes IE 95 14 depending on the batch ???  from the same supplier ??

I have no time to investigate this, I am just so glad I can get the chips up and running with my rough and ready loom between my two Arduino Deumilanove boards.

While waiting for each to load, I had time to think about the IC sockets  ( I havn't got round to ICSP yet with my current pcbs )

Both my Arduino boards are 3 years old now, and each have had many hundred chips  inserted in the sockets.

I had one socket fail in the first year, and tried putting in a "tulip" type socket, which I heard were better, but more expensive.

The socket lasted a couple of weeks until the inner tiny cylinder of the the sockets pulled out on the chips leg.

I changed back to the original type socket, and they are both coping well after lots of abuse.

Just musing while waiting for the chips to load.
60  Using Arduino / Networking, Protocols, and Devices / Re: How to / Can I limit the range of XBee series 1? on: January 21, 2014, 07:10:54 pm
So you will need a transceiver then, I dont know offhand which would be suitable, but I have seen some adverts for micropower modules.

Good luck

John
Pages: 1 2 3 [4] 5 6 ... 97