If you love LEDs on computers I'm sure you wanted one of these.

blueroomelectronics · Aug 27, 2007

It's an old CM-5 from thinking machines. Thousands of LEDs for the thousands of tiny microprocessors. Blinking and flashing.
**broken link removed**

ericgibbs · Aug 27, 2007

Hi Bill,

But I want to display hexadecimal and will they work for 12 months from a 9v battery?

Can you post the driver code, preferably written in Cobol and I need it by tomorrow

Eric

things · Aug 27, 2007

cool!! i wonder if once they all flashed to form a word

could you please send me the circuit diagram also my email is ispamtoomuch@spammerland.com

audioguru · Aug 28, 2007

Hi Eric,
LEDs use a lot of power.
A little PP3 9V alkaline battery has a very low amount of power and can light a single LED at 27mA for only about 32 hours, dimming all the time. After only 6 hours the 9V battery voltage is only 7V. After 20 hours the voltage is 6.2V and at 32 hours the voltage is 4V.

One year has 8760 hours. A little PP3 alkaline battery can supply only 0.1mA for one year.
An LED hex display with an average of 12 segments lighted at 10mA each uses 120mA.

Use an LCD display. It uses a very low amount of power if it is not lighted.

ericgibbs · Aug 28, 2007

audioguru said:
Hi Eric,
LEDs use a lot of power.
A little PP3 9V alkaline battery has a very low amount of power and can light a single LED at 27mA for only about 32 hours, dimming all the time. After only 6 hours the 9V battery voltage is only 7V. After 20 hours the voltage is 6.2V and at 32 hours the voltage is 4V.

One year has 8760 hours. A little PP3 alkaline battery can supply only 0.1mA for one year.
An LED hex display with an average of 12 segments lighted at 10mA each uses 120mA.

Use an LCD display. It uses a very low amount of power if it is not lighted.

hi agu,
Thank you for taking the time to respond.

I must apologise to you, I was making a joke reply for Bill's OP.
Its back fired on me

I owe you one!

Regards
Eric

blueroomelectronics · Aug 28, 2007

ericgibbs said:
Hi Bill,

But I want to display hexadecimal and will they work for 12 months from a 9v battery?
Can you post the driver code, preferably written in Cobol and I need it by tomorrow

Eric

No soup for you.

blueroomelectronics · Aug 28, 2007

ericgibbs said:
hi agu,
Thank you for taking the time to respond.

I must apologise to you, I was making a joke reply for Bill's OP.
Its back fired on me

I owe you one!

Regards
Eric

Now I could build it but it would be very very dim...

LOL sadly someone will probably seriously reqest that.
I like the posts that go... I have a 30W supply but I need 600W how do I build an adapter.

justDIY · Aug 28, 2007

blueroomelectronics said:
It's an old CM-5 from thinking machines. Thousands of LEDs for the thousands of tiny microprocessors. Blinking and flashing.

Hello Dear Sirs,

Thank you and congradulations on your postings of many leds project. I am current graduating training at university and needing assist with final project. I wish to create many leds but free power from sun with wireless gsm. Please help, I need to submit proposal by this end of month.

my email is sungradu@hotmails.com

thanks you!

just some humor guys, no need to reply

blueroomelectronics · Aug 28, 2007

ROTFLMAS

I love the internet, now here's a creative fellow. Completly off topic...
https://www.afrigadget.com/2007/06/21/the-knife-sharpening-bicycle/

ericgibbs · Aug 28, 2007

blueroomelectronics said:
No soup for you.

hi Bill,
Never mind the soup, I've just eaten 'crow' for audioguru!

Eric

ericgibbs · Aug 28, 2007

blueroomelectronics said:
ROTFLMAS

I love the internet, now here's a creative fellow. Completly off topic...
https://www.afrigadget.com/2007/06/21/the-knife-sharpening-bicycle/

Bill,
Ive actually seen this working recently in SouthAfrica.

Back in the UK during the 1930 and 1940's a guy would visit our neighbourhood about once a month and he used this exact setup,,, not joking.

Sharpened knives, scissors and the like

Eric

JimB · Aug 28, 2007

ericgibbs said:
Bill,
Back in the UK during the 1930 and 1940's a guy would visit our neighbourhood about once a month and he used this exact setup,,, not joking.
Sharpened knives, scissors and the like
Eric

I have seen this setup in the UK, probably until the late 50s.
A very practical solution.

JimB

blueroomelectronics · Aug 28, 2007

Just goes to show you a little inginutity goes a long way.

Here's a company that makes the an Altair PC case. Your leds in a retro look.
http://www.brielcomputers.com/altairpc.html
**broken link removed**

Nigel Goodwin · Aug 28, 2007

JimB said:
I have seen this setup in the UK, probably until the late 50s.
A very practical solution.

It was commonplace all over Europe - bit before my time though!

ThermalRunaway · Aug 28, 2007

blueroomelectronics said:
Just goes to show you a little inginutity goes a long way.

Here's a company that makes the an Altair PC case. Your leds in a retro look.
http://www.brielcomputers.com/altairpc.html
**broken link removed**

What do all those switches do?!?!

Brian

audioguru · Aug 28, 2007

blueroomelectronics said:
I have a 30W supply but I need 600W how do I build an adapter.

Some people think that an amplifier can boost a 30W supply to an output of 600W.
I think it would take a miracle to do that.

blueroomelectronics · Aug 28, 2007

ThermalRunaway said:
What do all those switches do?!?!

Brian

Brace yourself, that's how you programmed it.

things · Aug 28, 2007

its a built in keyboard

or should i say switchboard?

ericgibbs · Aug 28, 2007

Nigel Goodwin said:
It was commonplace all over Europe - bit before my time though!

hi,
Even back then the UK was at the "cutting edge of technology"

Eric

So as not to cause any confusion about the above statement,
"cutting edge of technology",
means the sharpening of cutting tools.

Hero999 · Aug 31, 2007

audioguru said:
Hi Eric,
LEDs use a lot of power.
A little PP3 9V alkaline battery has a very low amount of power and can light a single LED at 27mA for only about 32 hours, dimming all the time. After only 6 hours the 9V battery voltage is only 7V. After 20 hours the voltage is 6.2V and at 32 hours the voltage is 4V.

One year has 8760 hours. A little PP3 alkaline battery can supply only 0.1mA for one year.
An LED hex display with an average of 12 segments lighted at 10mA each uses 120mA.

Use an LCD display. It uses a very low amount of power if it is not lighted.

Of course it's perfectly possible, he didn't say how big the 9V battery is or how many rooms in is house he has spare to cram with batteries.

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