Search found 1416 matches

by mrtinb
Sun Jan 17, 2016 11:56 am
Forum: Hardware
Topic: Creating Wilf Rigter's ZXKBD v3
Replies: 52
Views: 17760

Re: Creating Wilf Rigter's ZXKBD v3

Using a transistor or an analog switch, one key can "press" multiple ZX81 key at once. Here is an example I use to have "Backspace" (BS) and "/" on a single key: http://forum.tlienhard.com/phpBB3/viewtopic.php?f=2&t=915&hilit=tasten#p8838 I looked at the Maplin instruktions yesterday evening and fo...
by mrtinb
Sat Jan 16, 2016 1:39 pm
Forum: Hardware
Topic: Creating Wilf Rigter's ZXKBD v3
Replies: 52
Views: 17760

Re: Creating Wilf Rigter's ZXKBD v3

1 2 3 4 5 6 7 8 9 0 <x SHIFT, 0 ed SHIFT, 1 > SHIFT 8 Q W E R T Y U I O P ^ SHIFT, 7 gr SHIFT, 9 A S D F G H J K L <x nl NEW LINE sp SPACE Z X C V B N M ^ . nl sh SHIFT < SHIFT, 5 sh fn ed gr sp sp < v > sh fn SHIFT, NEW LINE v SHIFT, 6 As pointed out to me earlier, the keys can't be used for multi...
by mrtinb
Sat Jan 16, 2016 1:07 pm
Forum: Hardware
Topic: Creating Wilf Rigter's ZXKBD v3
Replies: 52
Views: 17760

Re: Creating Wilf Rigter's ZXKBD v3

Hi :) Now the keys from China has arrived. They've been place loosely on top of a pcb. The keys are small 1.2 x 1.2 cm, and the transparent plastic can be opened up, og a small piece of paper can be place under the transparent plastic. E. g. look at the key with Q. This will be a small keyboard with...
by mrtinb
Thu Jan 14, 2016 9:00 am
Forum: Software
Topic: Memotext & word processing in general
Replies: 84
Views: 65797

Re: Memotext & word processing in general

Hi :) I've downloaded 'Hi-Res Word Processor (1983) (Nissim Elmalehes) from this page: http://nitroroms.com/list/Sinclair%20ZX%20Spectrum/by-name/page-513 Does anyone have a manual for this? Another question: I've read Andre***'s ZX91, and he uses 'Word Sinc II (P. Hargrave Nanaim)'. Is this availab...
by mrtinb
Tue Jan 12, 2016 12:23 pm
Forum: WANTED
Topic: zx81 Keyboard...Sort of
Replies: 13
Views: 9478

Re: zx81 Keyboard...Sort of

Look like you are trying to create the same as I am.

I will have it as an external keyboard via expansion board however.

I have similar keys.

http://sinclairzxworld.com/viewtopic.php?f=7&t=1793
by mrtinb
Fri Jan 08, 2016 1:19 pm
Forum: Hardware
Topic: Creating Wilf Rigter's ZXKBD v3
Replies: 52
Views: 17760

Re: Creating Wilf Rigter's ZXKBD v3

1024MAK wrote: You are learning and making good progress :D
I've learned more a by a couple of days in the forum than the electronics for beginners books I've read. ;-)

/Martin
by mrtinb
Fri Jan 08, 2016 8:01 am
Forum: Hardware
Topic: Creating Wilf Rigter's ZXKBD v3
Replies: 52
Views: 17760

Re: Creating Wilf Rigter's ZXKBD v3

5V and GND only. For the rest: the thinner the better. I always choose minimum allowed (by my PCB manufacturer) thickness for all lines except power. GND normally is "the rest of the PCB" on top and bottom side as it can't be thick enough. power supply (12V, 5V, 3.3V etc) as thick as the design all...
by mrtinb
Fri Jan 08, 2016 7:54 am
Forum: Hardware
Topic: Creating Wilf Rigter's ZXKBD v3
Replies: 52
Views: 17760

Re: Creating Wilf Rigter's ZXKBD v3

Paul wrote: Which software do you use? Maybe I could show you some beginner tricks?
http://fritzing.org

/Martin
by mrtinb
Fri Jan 08, 2016 7:23 am
Forum: Hardware
Topic: Creating Wilf Rigter's ZXKBD v3
Replies: 52
Views: 17760

Re: Creating Wilf Rigter's ZXKBD v3

Paul wrote:I would like to say that all power lines should be much thicker.
kind regards Paul
I'm n00b with electronics. Do you mean all lines, or e.g. 5V and GND?

/Martin
by mrtinb
Thu Jan 07, 2016 11:30 pm
Forum: Hardware
Topic: Creating Wilf Rigter's ZXKBD v3
Replies: 52
Views: 17760

Re: Creating Wilf Rigter's ZXKBD v3

Now the PCB design is complete. The board (10 cm x 5 cm) has been ordered in China. It looks quite confusing but this is my first board, and all connections have been made with autoroute. Now I need to order the ics, sockets, connectors, resistors, diodes and capacitor. Keyboard will be connected wi...