Sinclair ZX80 / ZX81 / Z88 Forums

1980 is the copyright, not he building date

There is nothing preventing the ribbon to break if it's original. It's brittle and can't be rescued. A replacement is the best you can do. Warm up the old membrane with a hair dryer then fiddle it of beginning at one edge of the left side. Most probably there will be glue sticking on the case, it ca...

The trick on desoldering is to apply fresh tin before desoldering. Normal metal pliers are what we use because plastic will melt.
I have pliers that are like needles at the tip. The smaller the tip the less heat is transferred.

I have a birthday.p as Autorun program on my zeddy.
So every time I start up my zeddy it tells me who's Birthday is next.
That happens a few times a day

SMB for SirMorrisBig and 17 for a year or a version number

Best place is really close to 5he regulator and Marks place is really the best.
The Pi Zero is fine with the 5V coming from the regulator as is has sufficient filters.
The Wespi circuit shows an electrolyte capacitor and please don't skip that. It's really necessary.

They are called CLIFF FCR1291
Just Google and you will find them

Make sure to sorrowly clean the dust from the PCB as it's conducting

I'm not an expert in this field and as english isn't my native language I don't know most names for the tools

I would use a cylindic grinding stone bit and use the top edge with low to medium speed.

It's tinned copper.
I prefer the Dremel approach.