Classic Schematics

[teenix]

Hi all,

If anyone is interested, I uploaded some schematics of the classics and HP67 in PDF format. I have left out the logic interconnections as to me they complicate matters, however all connections are marked.

http://www.teenix.org/classSchm.zip

cheers

Tony

[Harald]

Tony,

Thanks a lot for the effort and for making these avaialble!

Cheers,
Harald

[PANAMATIK]

Thanks teenix

I love classic schematics!

Bernhard

[DaveBr]

Thank you!

[[kby]]

Thank you!

[teenix]

Hi all,

I added schematics for HP-10 and HP-19C in PDF format to the zip file.

http://www.teenix.org/classSchm.zip

cheers

Tony

[Peter Monta]

Thanks---very useful and readable. On the HP-35 schematic, pins 15 and 17 of the 26-pin header have the same label, C3. One of them should be C4 I guess.

[teenix]

(06-10-2019 11:47 PM)Peter Monta Wrote:  Thanks---very useful and readable. On the HP-35 schematic, pins 15 and 17 of the 26-pin header have the same label, C3. One of them should be C4 I guess.

Thanks Peter,

Fixed. There are probably other bugs there that I missed. I'm sure sometimes when I see an error, my mind totally ignores it for some reason. Maybe my blind spot is bigger than I think.

Recently, and after numerous checks, I put in a new PCB design for the replacement HP-67 CPU board and as soon as I got the message it was completed and on it's way I saw a circuit error :-( Thankfully nothing major.

cheers

Tony

[Jim Horn]

Thank you for that, Tony!

Just a minor point - the HP67 Charger diode bridge is rotated clockwise 90° compared to the actual circuit (the four diodes should be pointing to the top of the 400µF cap).

Best to you - and thank you for all your research, hard work and delightful postings!

[teenix]

(06-11-2019 12:51 AM)Jim Horn Wrote:  Thank you for that, Tony!

Just a minor point - the HP67 Charger diode bridge is rotated clockwise 90° compared to the actual circuit (the four diodes should be pointing to the top of the 400µF cap).

Best to you - and thank you for all your research, hard work and delightful postings!

Thanks Jim, (all Classics too) Fixed :-)

I put the charger on its own sheet.

cheers

Tony

[isanchez]

Impressive! Congrats!
Thanks for sharing!

Kind regards

Ignacio

[[kby]]

(06-10-2019 04:29 PM)teenix Wrote:  Hi all,

I added schematics for HP-10 and HP-19C in PDF format to the zip file.

http://www.teenix.org/classSchm.zip

cheers

Tony

Thanks for the update! minor point: both the HP-10 and HP-19c are labeled HP-10.
-kby

[teenix]

(06-17-2019 03:34 AM)[kby] Wrote:  Thanks for the update! minor point: both the HP-10 and HP-19c are labeled HP-10.
-kby

All Fixed :-)

cheers

Tony

[Archilog]

Many thanks for those helpfull schematics!