You don’t have to have high-quality parts to play around with electronics and here’s a great example. [Vishal] used junk to play around with CapSense, the touch sensitive Arduino librar… ...

The ZX-81 keyboard was bad, but IMHO the Oric-1 keyboard is worse. As bad as old school flat membrane keyboards are, chicklet keys are even worse IMHO. The IBM PC Jr. Keyboard is a VERY close second.