Dan, thank you for your interest in my 2:5 Scale KENBAK-1 Personal Computer Reproduction project.

Thank you for liking my #Homebrew Digital Sampler in 1979! I'm happy to be able to reproduce the behavior from 45 years ago.

Hi, Dan! Thanks for your interest in #Pomelo: Gamma Spectroscopy Module!

Thanks for the like #Pi Radio Gateway

Thank you for liking my WDC-1 a "Working Digital Computer" project Dan. 

Thank you for liking my #Prehistory of my homemade PERSEUS computers !

Thank you for liking my #PERSEUS-3 6802 homebrew computer !

Thanks for liking #6 segments suffice !

Dan: your DL1416SmarTerm project is awesome!  Excellent work!

I also decided to follow your solar MPPT project.  I'm looking forward to see how you ended up implementing your final design.

Thanks Jonathan.  I think we live in the same city.  I read with interest your excellent project documentation on your own MPPT charger.  I definitely empathize with some of the issues you have faced.

Hi Dan

Really liked your serial to parallel printer solution.

Just wondering about some details of the project and how it is powered up.

Does it get its power directly from the printer or via the USB interface?

Also, would it be possible to get the code that the interface runs to convert from  serial to parallel ?

I am a bit new to arduino type projects, but I need to build such a device such as you have to help an elderly friend of mine who has a unit which prints out via a serial rs232 port. The unit does not have a USB or parallel interface and outputs only in Epson or hp protocol.

Ideally,  I wanted to find some sort of Rs232 -> USB b converter to print directly from the legacy rs232 unit to a USB printer, but realise that this is not an easy solution as there is likely a requirement for some sort of bridge to convert the protocol from rs232 to USB. Nothing on the net had anything like this.

Anyhow, I would really be grateful if you could share with me the aduino code or any other information from your project so that I can help my friend.

You can send me the info on tomkrst@gmail.com if it's ok.

Keep up the great work !!! 

Hi Tom,

You should be able to download both the schematic and arduino code for this project from the hackaday.io post.  Look for the section called "FILES".

My circuit normally gets power from the printer.  There is a schottky diode connecting the printer's +5 volt supply to the Arduino Pro-Micro raw voltage input (J1 is closed to bypass the on-board voltage regulator since we're supplying 5 volts).  This diode allows powering the arduino section from its USB port so that code can be loaded without the printer being powered.  It prevents power from the USB port flowing backwards into the printer.

Regarding your desire to print to a USB printer from RS232.  I wonder if something could be cobbled together cheaply using a Raspberry Pi (or Pi Zero since it is so cheap).  Have the pi's serial port take data from the RS232 device (though appropriate level shifting circuitry) and then spool it through Linux's printer software to an attached USB printer.

Anyway, let me know if you have any other questions about my HP printer project.
Regards, Dan

hello Dan! i tried to contact you. Please let know your free time.

Hello Dan! i tried to contact you. Please let know your free time.

Hi - Thanks for skulling my PowerBucket project - Michel

Howdy! Thanks for the skull! And nice work on the LED-computer!

Thanks and howdy back. Enjoyed reading through your various projects.

Thanks for following! - you might also like my printer:

https://hackaday.io/project/15584-the-printer

Thanks for the skull!  :)

You too, Sophi!  Hello again.

Dan! I remember seeing your beautiful art work a few years back. Nice to see you here :)