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BitWrangler.uk

Maker and tinkerer in retro-computers, electronics, micro controllers and software

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BitWrangler.uk

Category: ZX Spectrum

Projects related to the various ZX Spectrum computers originally released in 1982

Spectrum Demo board

Naked Spectrum

July 10, 2021 Gordon Pimblott Electronics, Projects, Retro Computers, ZX Spectrum

While fixing previous spectrums I bought a cheap motherboard in poor condition to use for spares. I knew it was[…]

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Dandanator mini PCB

Building a Dandanator mini

July 10, 2021 Gordon Pimblott Electronics, Projects, Retro Computers, ZX Spectrum

The Dandanator mini is an expansion card for the ZX Spectrum that enables fast ROM/game loading from a pre-programmed EEPROM.[…]

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Z80 Processor tester

Z80 Processor tester

July 7, 2021 Gordon Pimblott Electronics, Projects, Retro Computers, ZX Spectrum

The Z80 processor is a classic micro-processor. Originally designed in the 1970’s variants are still in production, and widely available[…]

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ZX Spectrum plus

ZX Spectrum+ (1984)

October 23, 2020 Gordon Pimblott Retro Computers, ZX Spectrum

After the well known ‘rubber keyed’ Spectrum came the ZX Spectrum+.  I never encountered one during my childhood, probably because[…]

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Spectrum finishing touches (part 4)

September 23, 2020 Gordon Pimblott Retro Computers, ZX Spectrum

With both Spectrum’s working I decided on a few upgrades before calling it a day.  Both of the cover plates[…]

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Lower ram replaced with sockets

Fixing the Issue 2 Spectrum (part 3)

September 23, 2020 Gordon Pimblott Retro Computers, ZX Spectrum

On first inspection the Issue 2 showed a picture with the typical Spectrum coloured border and some flashing bars in[…]

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Upper memory faults

Fixing the Issue 4 Spectrum (part 2)

September 23, 2020 Gordon Pimblott Retro Computers, ZX Spectrum

After checking the power rails it was obvious that the 5v regulator wasn’t working, so first action was to replace[…]

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Two 48K ZX Spectrums

A tale of two Spectrums (Part 1)

September 23, 2020 Gordon Pimblott Retro Computers, ZX Spectrum

Over the last couple of months I have been watching YouTube channels of people fixing various retro computers, mainly Commodore[…]

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Recent Posts

  • BBC Micro #3 (Caps, sound and colour)
  • BBC micro #2 (SD game loader)
  • BBC micro #1 (Power supply recapping)
  • Laptop panel recycled as Retro computer display
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