If you love LEDs on computers I'm sure you wanted one of these. - Electronic Circuits Projects Diagrams Free

blueroomelectronics · 28th August 2007, 07:24 AM

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

ericgibbs · 28th August 2007, 07:39 AM

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 · 28th August 2007, 07:43 AM

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 · 28th August 2007, 12:58 PM

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 · 28th August 2007, 01:07 PM

Quote:

Originally Posted by audioguru

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 · 28th August 2007, 03:38 PM

Quote:

Originally Posted by ericgibbs

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 · 28th August 2007, 03:41 PM

Quote:

Originally Posted by ericgibbs

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 · 28th August 2007, 03:45 PM

Quote:

Originally Posted by blueroomelectronics

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 · 28th August 2007, 03:53 PM

ROTFLMAS

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

ericgibbs · 28th August 2007, 04:19 PM

Quote:

Originally Posted by blueroomelectronics

No soup for you.

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

Eric

ericgibbs · 28th August 2007, 04:26 PM

Quote:

Originally Posted by blueroomelectronics

ROTFLMAS

I love the internet, now here's a creative fellow. Completly off topic...
http://www.afrigadget.com/2007/06/21...ening-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 · 28th August 2007, 04:57 PM

Quote:

Originally Posted by ericgibbs

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 · 28th August 2007, 05:48 PM

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

**Nigel Goodwin** · 28th August 2007, 09:09 PM

Quote:

Originally Posted by JimB

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 · 28th August 2007, 10:24 PM

Quote:

Originally Posted by blueroomelectronics

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

What do all those switches do?!?!

Brian

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28th August 2007, 07:24 AM	(permalink)
blueroomelectronics	If you love LEDs on computers I'm sure you wanted one of these. It's an old CM-5 from thinking machines. Thousands of LEDs for the thousands of tiny microprocessors. Blinking and flashing. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com

28th August 2007, 07:39 AM	(permalink)
ericgibbs	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

28th August 2007, 07:43 AM	(permalink)
things	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 __________________ The 3 laws of science.... 1. If it smells bad, It's chemistry. 2. If it's mushy, It's biology. 3. If it doesn't work, It's physics. www.laserpointerforums.com A forum for disscusion of lasers and laser shows! www.laserchat.org IRC chat for laser and electronic related stuff.

28th August 2007, 12:58 PM	(permalink)
audioguru	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. __________________ Uncle $crooge

28th August 2007, 03:53 PM	(permalink)
blueroomelectronics	ROTFLMAS I love the internet, now here's a creative fellow. Completly off topic... http://www.afrigadget.com/2007/06/21...ening-bicycle/ __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com

28th August 2007, 05:48 PM	(permalink)
blueroomelectronics	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 __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com