Sinclair ZX80 / ZX81 / Z88 Forums

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...

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...

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

1024MAK wrote: You are learning and making good progress

I've learned more a by a couple of days in the forum than the electronics for beginners books I've read.

/Martin

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...

Paul wrote: Which software do you use? Maybe I could show you some beginner tricks?

http://fritzing.org

/Martin

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

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...

On the keyboard it would be nice to have keys for cursor that enables both [Shift] combined with [5], [6], [7] and [8]. As the keys have 4 pins one set can be connected to [Shift] and the other to e.g. [5]. http://img.dxcdn.com/productimages/sku_158030_4.jpg Do I need a component that delays e.g. [5...

XorA wrote:Almost certainly Resistor Network!

Ah! I found this component

/Martin