turn your expensive oscilloscope into a $5 clock

Hi,

Here is my suggestion to turn your oscilloscope into a clock with a PIC a 4
resistors :
http://www.micro-examples.com/public/microex-navig/doc/082-pic-oscillo-clock

I'm opened to your destructive comments

Bruno

 

I remember hacking 6800 assembly code as a kid and tweaking R's and
C's in my ramp generator until I had spelled out my name on the scope
screen .

Somewhere on the world-wide-interweb is a 50's era article that shows
how to synthesize some very nicely rendered digits onto a X-Y display
using sine/cosine waves and harmonics.

Tim.

 

Check this out:
http://www.sparkfun.com/commerce/product_info.php?products_id=8488#

 

Your schematic has +5v connected directly to GND.

The project itself is cool, though.

 

Very nice... good use for that old Tek 2465B when you're not using it for Real
Work! (Granted, someone like Joerg might suggest that the ratio of how often
you use a 2465B to a digital 'scope tells you something about how good you are
at circuit troubleshooting... )

 

Well spotted !
I should have named the topic "how to turn your expensive power supply into
carbon".
Schematic has been corrected ;-)

Thanks !

Bruno

 

Ah.

 

Reminds me of a late '70s Byte project for Space War (gravity and
everything!) on a 'scope using an 8080.
[scuttles off to dig out code and see if it is feasible to translate to PIC
asm]

 

Well done.. Nice U Tube Video support

Fun is good

Regards

--
Walter Banks
Byte Craft Limited
Tel. (519) 888-6911
Fax (519) 746 6751
http://www.bytecraft.com

 

There was a nice article in the Proceedings of the IRE from the '50s
about doing just that -- it was a lot like a QEX article from more
recent times.

Regards,

Michael

 

Sorry, I was too busy using a $10,000.00 computer to replace
a 99 cent pack of playing cards while playing solitaire...

 

I ran a WAV of something like that on my oscilloscope. Too bad my
soundcard is crummy.



Tim

 

$10,000.00 computer? Are you interested in a used bridge, cheap?


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

Nice.
Hat down.

 

Look again.
it's not to ground, or at least when I looked at it it wasn't.

 

It sure looks like it's tied to ground.

Maybe you should reconsider this AND coupling capacitors.

 

I think you will find the small schematic on the page does have the
power supply short.
When you click it for the enlargement, you get the corrected version.
Depending on your age and your monitor the one directly on the page is
difficult to see if it is correct or not.

 

I would rather you sell me one of these for less than $10,000:

Dell PowerEdge 6800 server
Quad 3.4GHz/800Mhz/16mb Cache, Dual-Core Intel Xeon 7140M CPUs
8GB, DDR2, 400MHz (8X1GB) Single Ranked DIMMs, (Mirrored, 4GB usable)
Dual Power Supplies
24X IDE CD-RW/DVD ROM Drive
Split HD Backplane
2X5 Hot-Pluggable Split HDD Backplane
Dula PERC4DC-PCI Express controllers, 128MB Cache ea.
Two 146GB 15KRPM SCSI U320 HotPlug Hard Drives (RAID-1[mirrored])
Three 300GB 10KRPM SCSI U320 HotPlug Hard Drives (RAID-5)
Two Intel Pro 1000MT Dual Port Gigabit Network Adapters
List price: $16,063
Price after Volume discount: $11,244

(I didn't add the cost of Redhat, VMWare, multiple Windows
licenses, seperate NAS for backup, UPS, monitor, etc...)

BTW, I don't actually play Solitaire on a computer; until
the above system gets installed it will be running a chess
program -- and beating me badly every game.

 

Neat design, generating text in Y/T mode.

Let's be constructive:

With a small SW change you could put a needle ('invisible') pulse in each
image trace at the point in time where the scope should start, the scope
should be able to trigger on that. Just have enough time between images so
the scope hold off time has finished (normally not more than 10..20% of the
sweep time).
For most scopes this removes the need for the trigger cable (which still
makes thinks look as if you are doing X-Y control). For rotten scopes one
could still connect the old trigger output.

Regards,
Arie de Muynck