Sinclair ZX80 / ZX81 / Z88 Forums

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

XorA wrote:Almost certainly Resistor Network!

Is that a component, or just a schematic way to show multiple resistors connected?

/Martin

Hi :) I found Wilf Rigter's project to build an external connected keyboard like the version from Memotech. I've found this schematic http://www.user.dccnet.com/wrigter/index_files/ZXKBDv3_files/image003.gif on this page: http://www.user.dccnet.com/wrigter/index_files/ZXKBDv3.htm Unfortunately there...

I've read ZX91 from http://zx81.de/andre/.

In the first issue it's stated that the magazine is monthly and will last for at least a year.

How come there's only 5 issues?

Anyone know what happend?

Great read!

/Martin