In search of 4B3A Microswitch Keyswitches (for a restoration, not a keyboard collector!)
Al Kossow
aek at bitsavers.org
Fri Jul 10 16:28:59 CDT 2020
On 7/10/20 2:14 PM, Al Kossow via cctalk wrote:
> There are a couple of serious researchers out there who do useful work, here is what exists for the SD switch
> https://deskthority.net/wiki/Micro_Switch_SD_Series
>
the schematic of the 1660 microswitch keyboard can be found on page 235 of the maint manual
http://bitsavers.org/pdf/diablo/printer/400083-01_1660_Maintenance_Jul78.pdf
it uses x/y matrix style hall modules
the drawing you pointed to uses pulsed output switches
neither type will work in his application
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