Discussion forums for users of the Sinclair 8-bit range of computers - ZX80, ZX81, ZX Spectrum, Z88, clones...
About the ZX80 / ZX81
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by makeit2day » Sun Sep 02, 2018 5:16 pm
siggi wrote: ↑Sun Sep 02, 2018 2:44 pm
That are 4 analog switches (IC version of a relay). Maybe a CD4066?
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