A new DIY handheld

Hey guys,

years ago I built a little handheld Computer with a microcontroller


The thing had a basic interpreter built in to be able to program your own programs. Also some built-in programs like calendar, moon phase calculator, etc. and games.
Yes and now I'm rebuilding it with a larger display






The device is - inspired by the Tandy TRS-100, VTech Laser PC3 and PC4,
and more - a portable computer with which you can do smaller things
program and execute on the go and also on the PC via RS232
can transmit.

As interfaces I have: I²C, SPI, RS232 and PortA to the outside
guided.
In addition to games, smaller MSR tasks can also be programmed in this way.

PS: Pictures added as attachments is still NOT possible!

Edited by Citgo 2023-04-17 7:37 AM

Wow! very nice. I once had a similar PIC16F84 based device, but not with cool things you can do (software) like yours.
Mine only said "Welcome Professor..." lol.

-stingraze

Very cool, Citgo!

The keyboard is quite unique!

Have fun and keep us posted on it....

Makes me want to build something.....



Mark

Thank you guys.

I removed the keys from an old video mixer.

It's really a stripped down version of a keyboard. To write a text you have to select each individual character one after the other. Well, it's not meant for writing either, but rather for programming.

This is very cool @Citgo the B/W (or B/G) display is nice to use, I like the button choice they look very tactile!

Will you make a case for it too?

Thanks.
The display is a mega large one from an old heating controller. Since it is a high temperature display, it needs a negative voltage for contrast.
The keys are extremely easy to use, like a real keyboard. This makes writing much easier.

Of course, a case would be great. But I have to see how I can do that.

SUPER cool! Do you plan to have have schematics/software available for sale anywhere? I'd pay top dollar for this and if you can get a kit started for it you'd be rich.

Edited by WinFishCE 2023-04-19 2:58 AM

Thank you
Well I could upload the schematic and the source for free. That's not the problem.
But first I have to finish the project. The code isnt really finished.

I would get rich if the device could run Windows and Linux

I decided to build it sandwich like. So there will be another PCB under the display with the controller and all interfaces. So the device will be not bigger than a Jornada. Almost.